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Schindler TH, Sadhu J. Moving towards PET determined coronary flow capacity in outcome prediction after coronary revascularization? Int J Cardiol 2024; 405:131921. [PMID: 38432610 DOI: 10.1016/j.ijcard.2024.131921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Accepted: 02/28/2024] [Indexed: 03/05/2024]
Affiliation(s)
- Thomas H Schindler
- Mallinckrodt Institute of Radiology, Division of Nuclear Medicine, Cardiovascular Medicine, Washington University School of Medicine, St. Louis, MO, USA; Cardiovascular Division, John T. Milliken Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO, USA.
| | - Justin Sadhu
- Cardiovascular Division, John T. Milliken Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO, USA
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Kvitka D, Pauza DH. Pathways and morphologic pattern of blood supply of epicardial ganglionated nerve plexus. Ann Anat 2024; 252:152201. [PMID: 38128744 DOI: 10.1016/j.aanat.2023.152201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 11/29/2023] [Accepted: 12/14/2023] [Indexed: 12/23/2023]
Abstract
Detailed cardiac neuroanatomy is critical for understanding cardiac function and its pathology. However, there remains a significant gap in knowledge regarding the blood supply to the intrinsic cardiac ganglionated plexus (GP). This study addresses this by mapping the routes and morphological pattern of blood supply to the epicardial GP in a large-animal pig model (Sus scrofa domesticus). Twenty-five domestic pigs were used in the study. We demonstrate that the epicardial ganglionated nerves receive blood from both coronary and extra-cardiac arteries. The coronary arterial branches supply blood to all five subplexuses constituting the epicardial GP. In contrast, the branches of extra-cardiac arteries supply blood to target heart areas: 1) the venous part of the heart hilum on the left atrium, 2) the walls of the sinuses of the right cranial (superior cava) and 3) pulmonary veins. Uniformly, epicardial nerves and ganglia are supplied with blood via a sole epineurial arteriole which, in most cases, is the fifth/sixth-order branch of the coronary arteries. The extra-cardiac arteries supplying blood to the epicardial GP accompanied the mediastinal nerves entering the epicardium within the limits of the heart hilum. Together, the dual and triple blood supply of the epicardial nerves and ganglia suggests a protective role from an ischemic event and/or ischemic heart disease. STUCTURED ABSTRACT: This study details the anatomy of the blood supply of epicardial ganglionated nerve plexus, from which nerve fibres extend to the myocardium, heart conduction system, coronary vessels, and endocardium, in the most popular animal model of experimental cardiology and cardiac surgery - the domestic pig. Our observations demonstrate that the epicardial nerves and ganglia receive blood from both coronary and extra-cardiac arteries. The multi-source blood supply to the cardiac nerves and ganglia may offer protection against myocardial infarction ant other ischemic heart disorders.
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Affiliation(s)
- Dmitrij Kvitka
- Institute of Anatomy, Faculty of Medicine, Lithuanian University of Health Sciences, A. Mickeviciaus Street 9, Kaunas LT 44307, Lithuania.
| | - Dainius H Pauza
- Institute of Anatomy, Faculty of Medicine, Lithuanian University of Health Sciences, A. Mickeviciaus Street 9, Kaunas LT 44307, Lithuania.
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Rissi R, Gonsalves DG, Marques MJ, Neto HS. Congenital morphological patterns of myocardial bridges. Morphologie 2023; 107:100603. [PMID: 37246099 DOI: 10.1016/j.morpho.2023.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 05/10/2023] [Accepted: 05/15/2023] [Indexed: 05/30/2023]
Abstract
BACKGROUND Myocardial bridging (MB) is a coronary anomaly in which a segment of the coronary artery is overlapped by a layer of myocardial tissue. Nowadays, there is no scientific agreement on if the MB are congenital or acquired or on the factors that determine their presence and/or absence. OBJECTIVE This study is performed to analyze the anatomical characteristics of adult and children's hearts regarding the shape of the left coronary artery branching, presence of pre-bridge arterial branch, coronary dominance and its correlations to MB formation. METHODS We analyzed 240 adults heart specimens and 63 children's specimens. The frequency of the myocardial bridges (MB) occurrence was performed through observational study of the anatomical specimens. The shape of the left coronary artery (LCA) branching, presence of pre-bridge arterial branch (PBB) and coronary dominance was determined superficial dissection of the epicardial adipose tissue and careful evaluation of the hearts. RESULTS A relation between the trifurcated pattern of the LCA and the presence of MB (P<0.0001, odds ratio=3.74) was found in adults heart and in children's hearts (P=0.003, odds ratio=16.0), as well as a relation between the presence of PBB and the presence of MB in adult hearts (P<0.0001) and children's hearts (P<0.0001). CONCLUSION Our findings suggest for the first time that the myocardial bridges are related to the presence of trifurcation of the left coronary artery and the pre-bridge arterial branch in adult and children's hearts.
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Affiliation(s)
- Renato Rissi
- Medical School, Padre Albino University Center (FAMECA-UNIFIPA), rua dos Estudantes, 225, Catanduva, 15.809-144 São Paulo, Brazil; Department of Structural and Functional Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil.
| | - Daniel Gregório Gonsalves
- Medical School, Padre Albino University Center (FAMECA-UNIFIPA), rua dos Estudantes, 225, Catanduva, 15.809-144 São Paulo, Brazil
| | - Maria Julia Marques
- Department of Structural and Functional Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil
| | - Humberto Santo Neto
- Department of Structural and Functional Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil
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4
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Anyfanti P, Dimitriadou A, Dara A, Angeloudi E, Gavriilaki E, Nikolaidou B, Triantafyllou A, Dimitroulas T, Gkaliagkousi E. Circulating levels of galectin-3 and coronary microvascular perfusion in rheumatoid arthritis patients with suppressed inflammation. Clin Rheumatol 2023; 42:2881-2887. [PMID: 37418035 DOI: 10.1007/s10067-023-06685-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 06/18/2023] [Accepted: 06/24/2023] [Indexed: 07/08/2023]
Abstract
OBJECTIVE Cardiovascular manifestations are the leading cause of mortality in rheumatoid arthritis (RA). Galectin-3, a lectin protein with major role in cellular, inflammatory, and fibrotic processes, has been introduced as a novel cardiac biomarker. We hypothesized that patients with RA present increased levels of galectin-3, and investigated potential associations with arterial stiffness and coronary microvascular dysfunction. METHODS This cross-sectional study enrolled RA patients and non-RA individuals without cardiovascular comorbidities. Galectin-3 and high-sensitivity C-reactive protein (hsCRP) were measured with enzyme-linked immunosorbent assay (ELISA) in serum samples. Subendocardial viability ratio (SEVR), an index of microvascular myocardial perfusion, and pulse wave velocity (PWV), the gold-standard measure of vascular stiffness, were estimated with applanation tonometry. RESULTS Cardiovascular risk factors and hsCRP were comparable between patients (n = 24) and controls (n = 24). However, galectin-3 was increased [6.9 (6.7) vs 4.6 (4.7)] ng/dl, p = 0.015], and coronary microvascular perfusion was decreased (142.6 ± 22.8 vs 159.7 ± 23.2%, p = 0.028) in RA patients compared to controls, whereas PWV did not significantly differ. Galectin-3 correlated with both PWV and SEVR in univariate analysis. However, after adjustment for cardiovascular risk factors and subclinical inflammation, these associations were rendered non-significant. CONCLUSION Galectin-3 appears increased in RA, even among patients with suppressed inflammation in the absence of cardiovascular comorbidities. The observed association of galectin-3 with coronary microvascular perfusion in our study was non-significant after adjustment for cardiovascular risk factors and inflammation. The potential role of galectin-3 as a cardiac biomarker in RA warrants further investigation. Key Points • Galectin-3 has emerged as a novel cardiac biomarker but remains understudied in RA. • Patients with RA present elevated levels of galectin-3 and impaired coronary microvascular perfusion compared to non-RA individuals. • These differences were observed in patients with suppressed inflammation, even in the absence of CVD. • The association of galectin-3 with coronary microvascular impairment in RA warrants further investigation.
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Affiliation(s)
- Panagiota Anyfanti
- Second Medical Department, Hippokration General Hospital, Aristotle University of Thessaloniki, 49, Konstantinoupoleos Str, 54642, Thessaloniki, Greece.
| | - Antonia Dimitriadou
- 3rd Department of Internal Medicine, Papageorgiou Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Athanasia Dara
- Fourth Department of Internal Medicine, Hippokration Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Elena Angeloudi
- Second Medical Department, Hippokration General Hospital, Aristotle University of Thessaloniki, 49, Konstantinoupoleos Str, 54642, Thessaloniki, Greece
| | - Eleni Gavriilaki
- 2nd Propedeutic Department of Internal Medicine, Hippokration Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Barbara Nikolaidou
- 3rd Department of Internal Medicine, Papageorgiou Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Areti Triantafyllou
- 3rd Department of Internal Medicine, Papageorgiou Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Theodoros Dimitroulas
- Fourth Department of Internal Medicine, Hippokration Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Eugenia Gkaliagkousi
- 3rd Department of Internal Medicine, Papageorgiou Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
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Zhao ZZ, Li E, Li XJ, Guo Q, Shi QB, Li MW. Effects of remote ischemic preconditioning on coronary blood flow and microcirculation. BMC Cardiovasc Disord 2023; 23:404. [PMID: 37592218 PMCID: PMC10433538 DOI: 10.1186/s12872-023-03419-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Accepted: 07/26/2023] [Indexed: 08/19/2023] Open
Abstract
This study aimed to determine the effect of short-term remote ischemic preconditioning (RIPC) on coronary blood flow and microcirculation function using the quantitative flow ratio (QFR) and index of microcirculatory resistance (IMR). We randomly divided 129 patients undergoing coronary angiography (CAG) into RIPC and control groups. Following the first CAG, we randomly divided the patients further into the unilateral upper limb and lower limb groups for four cycles of ischemia/reperfusion circulation; subsequently, we performed the second CAG. During each CAG, contrast-flow QFR (cQFR), fixed-flow QFR (fQFR), and IMR (in patients with cardiac syndrome X) were calculated and compared. We measured 253 coronary arteries in 129 patients. Compared to the control group, the average cQFR of the RIPC group increased significantly after RIPC. Additionally, 23 patients with cardiac syndrome X (IMR > 30) were included in this study. Compared to the control group, IMR and the difference between cQFR and fQFR (cQFR-fQFR) both decreased significantly after receiving RIPC. The application of RIPC can increase coronary blood flow and improve coronary microcirculation function.
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Affiliation(s)
- Zhen-Zhou Zhao
- Heart Center of Henan Provincial People's Hospital, Fuwai Central China Cardiovascular Hospital, Henan Province, Zhengzhou, 450003, Henan Province, China
| | - En Li
- Heart Center of Henan Provincial People's Hospital, Fuwai Central China Cardiovascular Hospital, Henan Province, Zhengzhou, 450003, Henan Province, China
| | - Xue-Jie Li
- Heart Center of Henan Provincial People's Hospital, Fuwai Central China Cardiovascular Hospital, Henan Province, Zhengzhou, 450003, Henan Province, China
| | - Quan Guo
- Heart Center of Henan Provincial People's Hospital, Fuwai Central China Cardiovascular Hospital, Henan Province, Zhengzhou, 450003, Henan Province, China
| | - Qing-Bo Shi
- Heart Center of Henan Provincial People's Hospital, Fuwai Central China Cardiovascular Hospital, Henan Province, Zhengzhou, 450003, Henan Province, China
| | - Mu-Wei Li
- Heart Center of Henan Provincial People's Hospital, Fuwai Central China Cardiovascular Hospital, Henan Province, Zhengzhou, 450003, Henan Province, China.
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Dong F, Yin L, Sisakian H, Hakobyan T, Jeong LS, Joshi H, Hoff E, Chandler S, Srivastava G, Jabir AR, Kimball K, Chen YR, Chen CL, Kang PT, Shabani P, Shockling L, Pucci T, Kegecik K, Kolz C, Jia Z, Chilian WM, Ohanyan V. Takotsubo syndrome is a coronary microvascular disease: experimental evidence. Eur Heart J 2023; 44:2244-2253. [PMID: 37170610 PMCID: PMC10290875 DOI: 10.1093/eurheartj/ehad274] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 02/08/2023] [Accepted: 04/26/2023] [Indexed: 05/13/2023] Open
Abstract
BACKGROUND AND AIMS Takotsubo syndrome (TTS) is a conundrum without consensus about the cause. In a murine model of coronary microvascular dysfunction (CMD), abnormalities in myocardial perfusion played a key role in the development of TTS. METHODS AND RESULTS Vascular Kv1.5 channels connect coronary blood flow to myocardial metabolism and their deletion mimics the phenotype of CMD. To determine if TTS is related to CMD, wild-type (WT), Kv1.5-/-, and TgKv1.5-/- (Kv1.5-/- with smooth muscle-specific expression Kv1.5 channels) mice were studied following transaortic constriction (TAC). Measurements of left ventricular (LV) fractional shortening (FS) in base and apex, and myocardial blood flow (MBF) were completed with standard and contrast echocardiography. Ribonucleic Acid deep sequencing was performed on LV apex and base from WT and Kv1.5-/- (control and TAC). Changes in gene expression were confirmed by real-time-polymerase chain reaction. MBF was increased with chromonar or by smooth muscle expression of Kv1.5 channels in the TgKv1.5-/-. TAC-induced systolic apical ballooning in Kv1.5-/-, shown as negative FS (P < 0.05 vs. base), which was not observed in WT, Kv1.5-/- with chromonar, or TgKv1.5-/-. Following TAC in Kv1.5-/-, MBF was lower in LV apex than in base. Increasing MBF with either chromonar or in TgKv1.5-/- normalized perfusion and function between LV apex and base (P = NS). Some genetic changes during TTS were reversed by chromonar, suggesting these were independent of TAC and more related to TTS. CONCLUSION Abnormalities in flow regulation between the LV apex and base cause TTS. When perfusion is normalized between the two regions, normal ventricular function is restored.
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Affiliation(s)
- Feng Dong
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, Ohio 44272, USA
| | - Liya Yin
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, Ohio 44272, USA
| | - Hamayak Sisakian
- Department of Cardiology, Yerevan State Medical University, Yerevan, Kentron, Armenia
| | - Tatevik Hakobyan
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, Ohio 44272, USA
| | - Lacey S Jeong
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, Ohio 44272, USA
| | - Hirva Joshi
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, Ohio 44272, USA
| | - Ellianna Hoff
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, Ohio 44272, USA
| | - Selena Chandler
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, Ohio 44272, USA
| | - Geetika Srivastava
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, Ohio 44272, USA
| | - Abdur Rahman Jabir
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, Ohio 44272, USA
| | - Kelly Kimball
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, Ohio 44272, USA
| | - Yeong-Renn Chen
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, Ohio 44272, USA
| | - Chwen-Lih Chen
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, Ohio 44272, USA
| | - Patrick T Kang
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, Ohio 44272, USA
| | - Parisa Shabani
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, Ohio 44272, USA
| | - Lindsay Shockling
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, Ohio 44272, USA
| | - Thomas Pucci
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, Ohio 44272, USA
| | - Karlina Kegecik
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, Ohio 44272, USA
| | - Christopher Kolz
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, Ohio 44272, USA
| | - Zhenyu Jia
- Department of Botany and Plant Sciences, University of California, Riverside, CA, USA
| | - William M Chilian
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, Ohio 44272, USA
| | - Vahagn Ohanyan
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, Ohio 44272, USA
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Warne CM, Essajee SI, Tucker SM, Figueroa CA, Beard DA, Dick GM, Tune JD. Oxygen-sensing pathways below autoregulatory threshold act to sustain myocardial oxygen delivery during reductions in perfusion pressure. Basic Res Cardiol 2023; 118:12. [PMID: 36988670 PMCID: PMC10797605 DOI: 10.1007/s00395-023-00985-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 03/13/2023] [Accepted: 03/17/2023] [Indexed: 03/30/2023]
Abstract
The coronary circulation has an innate ability to maintain constant blood flow over a wide range of perfusion pressures. However, the mechanisms responsible for coronary autoregulation remain a fundamental and highly contested question. This study interrogated the local metabolic hypothesis of autoregulation by testing the hypothesis that hypoxemia-induced exaggeration of the metabolic error signal improves the autoregulatory response. Experiments were performed on open-chest anesthetized swine during stepwise changes in coronary perfusion pressure (CPP) from 140 to 40 mmHg under normoxic (n = 15) and hypoxemic (n = 8) conditions, in the absence and presence of dobutamine-induced increases in myocardial oxygen consumption (MVO2) (n = 5-7). Hypoxemia (PaO2 < 40 mmHg) decreased coronary venous PO2 (CvPO2) ~ 30% (P < 0.001) and increased coronary blood flow ~ 100% (P < 0.001), sufficient to maintain myocardial oxygen delivery (P = 0.14) over a wide range of CPPs. Autoregulatory responsiveness during hypoxemia-induced reductions in CvPO2 were associated with increases of autoregulatory gain (Gc; P = 0.033) but not slope (P = 0.585) over a CPP range of 120 to 60 mmHg. Preservation of autoregulatory Gc (P = 0.069) and slope (P = 0.264) was observed during dobutamine administration ± hypoxemia. Reductions in coronary resistance in response to decreases in CPP predominantly occurred below CvPO2 values of ~ 25 mmHg, irrespective of underlying vasomotor reserve. These findings support the presence of an autoregulatory threshold under which oxygen-sensing pathway(s) act to preserve sufficient myocardial oxygen delivery as CPP is reduced during increases in MVO2 and/or reductions in arterial oxygen content.
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Affiliation(s)
- Cooper M Warne
- Department of Physiology and Anatomy, University of North Texas Health Science Center, 3500 Camp Bowie Blvd., TX, 76107, Fort Worth, USA
| | - Salman I Essajee
- Department of Physiology and Anatomy, University of North Texas Health Science Center, 3500 Camp Bowie Blvd., TX, 76107, Fort Worth, USA
| | - Selina M Tucker
- Department of Physiology and Anatomy, University of North Texas Health Science Center, 3500 Camp Bowie Blvd., TX, 76107, Fort Worth, USA
| | - C Alberto Figueroa
- Section of Vascular Surgery, Department of Surgery, University of Michigan, Ann Arbor, USA
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, USA
| | - Daniel A Beard
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, USA
| | - Gregory M Dick
- Department of Physiology and Anatomy, University of North Texas Health Science Center, 3500 Camp Bowie Blvd., TX, 76107, Fort Worth, USA
| | - Johnathan D Tune
- Department of Physiology and Anatomy, University of North Texas Health Science Center, 3500 Camp Bowie Blvd., TX, 76107, Fort Worth, USA.
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Wallbom N, Zena LA, McArley TJ, Ekström A, Axelsson M, Gräns A, Sandblom E, Morgenroth D, Kallstenius N. Increased reliance on coronary perfusion for cardiorespiratory performance in seawater-acclimated rainbow trout. J Exp Biol 2023; 226:286759. [PMID: 36700410 PMCID: PMC10088527 DOI: 10.1242/jeb.244733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Accepted: 01/09/2023] [Indexed: 01/27/2023]
Abstract
Salmonid ventricles are composed of spongy and compact myocardium, the latter being perfused via a coronary circulation. Rainbow trout (Oncorhynchus mykiss) acclimated to sea water have higher proportions of compact myocardium and display stroke volume-mediated elevations in resting cardiac output relative to freshwater-acclimated trout, probably to meet the higher metabolic needs of osmoregulatory functions. Here, we tested the hypothesis that cardiorespiratory performance of rainbow trout in sea water is more dependent on coronary perfusion by assessing the effects of coronary ligation on cardiorespiratory function in resting and exhaustively exercised trout acclimated to fresh water or sea water. While ligation only had minor effects on resting cardiorespiratory function across salinities, cardiac function after chasing to exhaustion was impaired, presumably as a consequence of atrioventricular block. Ligation reduced maximum O2 consumption rate by 33% and 17% in fish acclimated to sea water and fresh water, respectively, which caused corresponding 41% and 17% reductions in aerobic scope. This was partly explained by different effects on cardiac performance, as maximum stroke volume was only significantly impaired by ligation in sea water, resulting in 38% lower maximum cardiac output in seawater compared with 28% in fresh water. The more pronounced effect on respiratory performance in sea water was presumably also explained by lower blood O2 carrying capacity, with ligated seawater-acclimated trout having 16% and 17% lower haemoglobin concentration and haematocrit, respectively, relative to ligated freshwater trout. In conclusion, we show that the coronary circulation allows seawater-acclimated trout to maintain aerobic scope at a level comparable to that in fresh water.
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Affiliation(s)
- Nicklas Wallbom
- Department of Biological and Environmental Sciences, University of Gothenburg, 405 30 Gothenburg, Sweden
| | - Lucas A Zena
- Department of Biological and Environmental Sciences, University of Gothenburg, 405 30 Gothenburg, Sweden
| | - Tristan J McArley
- Department of Biological and Environmental Sciences, University of Gothenburg, 405 30 Gothenburg, Sweden
| | - Andreas Ekström
- Department of Biological and Environmental Sciences, University of Gothenburg, 405 30 Gothenburg, Sweden
| | - Michael Axelsson
- Department of Biological and Environmental Sciences, University of Gothenburg, 405 30 Gothenburg, Sweden
| | - Albin Gräns
- Department of Animal Environment and Health, Swedish University of Agricultural Sciences, 405 30 Gothenburg, Sweden
| | - Erik Sandblom
- Department of Biological and Environmental Sciences, University of Gothenburg, 405 30 Gothenburg, Sweden
| | - Daniel Morgenroth
- Department of Biological and Environmental Sciences, University of Gothenburg, 405 30 Gothenburg, Sweden
| | - Nicklas Kallstenius
- University of Gothenburg, Department of Biological and Environmental Sciences, Sweden
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Rösch Y, Eggenberger D, Kuster Y, Widmer L, Frey S, Schwartz R, Nef C, Ulmer J, Obrist D. Enhanced Drug Delivery for Cardiac Microvascular Obstruction with an Occlusion-Infusion-Catheter. Ann Biomed Eng 2023; 51:1343-1355. [PMID: 36681747 PMCID: PMC10172228 DOI: 10.1007/s10439-023-03142-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 01/05/2023] [Indexed: 01/22/2023]
Abstract
Microvascular Obstruction (MVO) is a common consequence of acute myocardial infarction. MVO is underdiagnosed and treatment is often nonspecific and ineffective. A multi-scale in-vitro benchtop model was established to investigate drug perfusion in MVO affected microcirculation. The central element of the benchtop model was a fluidic microchip containing channels with diameters between [Formula: see text] and 50 μm representing [Formula: see text] of the microvascular tree fed by the left anterior descending artery (LAD). The outlets of the chip could be closed to mimic MVO. Two methods for intracoronary infusion of pharmacologic agents (simulated by dye) to regions with MVO were investigated using an occlusion-infusion catheter. The first case was a simple, bolus-like infusion into the LAD, whereas the second case consisted of infusion with concomitant proximal occlusion of the LAD phantom with a balloon. Results show that local dye concentration maxima in the chip with MVO were 2.2-3.2 times higher for the case with proximal balloon occlusion than for the conventional infusion method. The cumulated dose could be raised by a factor 4.6-5.2. These results suggest that drug infusion by catheter is more effective if the blood supply to the treated vascular bed is temporarily blocked by a balloon catheter.
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Affiliation(s)
- Yannick Rösch
- ARTORG Center for Biomedical Engineering Research, University of Bern, Freiburgstrasse 3, 3010, Bern, Switzerland.
| | - David Eggenberger
- Institute for Microtechnology and Photonics, OST University of Applied Sciences, Buchs SG, Switzerland
| | - Yves Kuster
- Institute for Microtechnology and Photonics, OST University of Applied Sciences, Buchs SG, Switzerland
| | - Lino Widmer
- ARTORG Center for Biomedical Engineering Research, University of Bern, Freiburgstrasse 3, 3010, Bern, Switzerland
| | | | | | - Cornelia Nef
- Institute for Microtechnology and Photonics, OST University of Applied Sciences, Buchs SG, Switzerland
- matriq AG, St. Gallen, Switzerland
| | - Jens Ulmer
- Institute for Microtechnology and Photonics, OST University of Applied Sciences, Buchs SG, Switzerland
| | - Dominik Obrist
- ARTORG Center for Biomedical Engineering Research, University of Bern, Freiburgstrasse 3, 3010, Bern, Switzerland
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10
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Cheng J, Zhen M, Cheng Y. The "Hand as Foot" teaching method in coronary circulation. Asian J Surg 2022; 45:2865-2866. [PMID: 35764485 DOI: 10.1016/j.asjsur.2022.06.071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 06/10/2022] [Indexed: 12/15/2022] Open
Affiliation(s)
- Jinfeng Cheng
- Department of Cardiology, Binzhou Medical University Hospital, Binzhou, Shandong Province, China
| | - Mengmeng Zhen
- Department of Cardiology, Binzhou Medical University Hospital, Binzhou, Shandong Province, China
| | - Yanli Cheng
- Department of Cardiology, Binzhou Medical University Hospital, Binzhou, Shandong Province, China.
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11
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Lorenzoni RP, Elkins N, Quezada M, Silver EJ, Mahgerefteh J, Hsu DT, Choueiter NF. Impact of Z score system on the management of coronary artery lesions in Kawasaki disease. Cardiol Young 2022; 32:952-9. [PMID: 34494945 DOI: 10.1017/S1047951121003437] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND Coronary artery aneurysms are well-described in Kawasaki disease and the Multisystem Inflammatory Syndrome in Children and are graded using Z scores. Three Z score systems (Boston, Montreal, and DC) are widely used in North America. The recent Pediatric Heart Network Z score system is derived from the largest diverse sample to-date. The impact of Z score system on the rate of coronary dilation and management was assessed in a large real-world dataset. METHODS Using a combined dataset of patients with acute Kawasaki disease from the Children's Hospital at Montefiore and the National Heart, Lung, and Blood Institute Kawasaki Disease Study, coronary Z scores and the rate of coronary lesions (Z ≥ 2.0) and aneurysms (Z ≥ 2.5) were determined using four Z score systems. Agreement among Z scores and the effect on Kawasaki management were assessed. RESULTS Of 333 patients analysed, 136 were from Montefiore and 197 from the Kawasaki Disease Study. Age, sex, body surface area, and rate of coronary lesions did not differ between the samples. Among the four Z score systems, the rate of acute coronary lesions varied from 24 to 55%. The mean left anterior descending Z scores from Pediatric Heart Network and Boston had a large uniform discrepancy of 1.3. Differences in Z scores among the four systems may change anticoagulation management in up to 22% of a Kawasaki population. CONCLUSIONS Choice of Z score system alone may impact Kawasaki disease diagnosis and management. Further research is necessary to determine the ideal coronary Z score system.
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12
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Kawase Y, Matsuo H, Kuramitsu S, Shiono Y, Akasaka T, Tanaka N, Amano T, Kozuma K, Nakamura M, Yokoi H, Kobayashi Y, Ikari Y. Clinical use of physiological lesion assessment using pressure guidewires: an expert consensus document of the Japanese association of cardiovascular intervention and therapeutics-update 2022. Cardiovasc Interv Ther 2022. [PMID: 35543896 DOI: 10.1007/s12928-022-00863-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Accepted: 04/16/2022] [Indexed: 01/10/2023]
Abstract
Fractional flow reserve and instantaneous wave-free ratio are widely accepted and recommended in Western and Japanese guidelines for appropriate percutaneous coronary intervention. There are, however, many differences in clinical situations between Japan and Western countries. Therefore, the Task Force on coronary physiology of the Japanese Association of Cardiovascular Intervention and Therapeutics (CVIT) has proposed an expert consensus document to summarize current evidence and suggest the practical use of physiological lesion assessment in Japan.
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13
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Saito Y, Nishi T, Kato K, Kitahara H, Kobayashi Y. Resistive reserve ratio and microvascular resistance reserve in patients with coronary vasospastic angina. Heart Vessels 2022; 37:1489-1495. [PMID: 35301553 DOI: 10.1007/s00380-022-02051-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Accepted: 03/04/2022] [Indexed: 11/29/2022]
Abstract
Patients with epicardial coronary vasospastic angina (VSA) may be likely to have coronary microvascular dysfunction, although mixed results have been reported. The aim of this study was to evaluate coronary microvascular function in detail using novel invasive physiologic indices, such as resistive reserve ratio (RRR) and microvascular resistance reserve (MRR). A total of 45 patients undergoing intracoronary acetylcholine (ACh) provocation test and invasive coronary circulatory evaluation using a thermodilution method were prospectively included. VSA was diagnosed as angiographic vasospasm accompanied by chest pain and/or ischemic electrocardiographic changes by intracoronary injection of ACh. Coronary circulation was assessed with physiologic indices including fractional flow reserve, resting and hyperemic mean transit time (Tmn), coronary flow reserve (CFR), basal resistance index, index of microcirculatory resistance (IMR), RRR, and MRR. Of 45 patients, 23 (51.1%) were diagnosed as having VSA. Patients with positive ACh test had longer resting Tmn (slower coronary flow velocity), higher basal resistance index, and greater RRR and MRR than those without, while fractional flow reserve, CFR, and IMR did not differ significantly between the two groups. In conclusion, although conventional measures such as CFR and IMR failed to show significant differences, RRR and MRR, novel invasive coronary physiologic indices, provided counterintuitive insights that coronary microvascular dilation function was better preserved in patients with VSA than those without.
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Affiliation(s)
- Yuichi Saito
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo-ku, Chiba, Chiba, 260-8677, Japan.
| | - Takeshi Nishi
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo-ku, Chiba, Chiba, 260-8677, Japan.,Department of Cardiology, Kawasaki Medical School, Kurashiki, Japan
| | - Ken Kato
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo-ku, Chiba, Chiba, 260-8677, Japan
| | - Hideki Kitahara
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo-ku, Chiba, Chiba, 260-8677, Japan
| | - Yoshio Kobayashi
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo-ku, Chiba, Chiba, 260-8677, Japan
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14
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Akyuz A, Mert B, Ozkaramanli Gur D, Mucip Efe M, Aykac H, Alpsoy S, Guzel S. Association of lower serum irisin levels with diabetes mellitus: Irrespective of coronary collateral circulation, and syntax score. North Clin Istanb 2021; 8:607-14. [PMID: 35284785 DOI: 10.14744/nci.2021.73669] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 01/27/2021] [Indexed: 11/30/2022] Open
Abstract
Objective: Irisin is a myokine thought to be involved in the pathophysiological process of atherosclerosis with its’ cardiovascular protective effects. Patients with diabetes mellitus (DM) have lower levels of irisin. Therefore, we investigated whether there is a connection between irisin, DM, coronary collateral circulation (CCC), and SYNTAX scores representing coronary artery disease (CAD) severity. Methods: This study evaluated 86 patients who have at least one epicardial coronary artery with chronic total occlusion. We included Rentrop 0–1 into the poor CCC group (n=45) and Rentrop 2–3 into the good CCC group (n=41) and measured serum irisin levels. Results: Irisin levels did not differ (17585 [882–37741] pg/ml and (17504 [813–47683] pg/ml, p=0.772) between the two groups. Irisin levels were lower in patients with diabetes (n=41; 14485 [813–29398] pg/ml) than those without diabetes (n=45; 19724 [865–47683] pg/ml (p=0.002). Irisin was not correlated with SYNTAX scores. In multivariate analysis, DM (OR=0.463; CI: 0.184–0.783; p=0.012) was a negative predictor of good CCC development Conclusion: Although its level is decreased in patients with diabetes, serum irisin levels have no role in the pathophysiology of collateral development and CAD severity.
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15
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Ekström A, Prystay TS, Abrams AEI, Carbajal A, Holder PE, Zolderdo AJ, Sandblom E, Cooke SJ. Impairment of branchial and coronary blood flow reduces reproductive fitness, but not cardiac performance in paternal smallmouth bass (Micropterus dolomieu). Comp Biochem Physiol A Mol Integr Physiol 2022; 267:111165. [PMID: 35167975 DOI: 10.1016/j.cbpa.2022.111165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 02/09/2022] [Accepted: 02/09/2022] [Indexed: 11/18/2022]
Abstract
The capacity to extract oxygen from the water, and the ability of the heart to drive tissue oxygen transport, are fundamental determinants of important life-history performance traits in fish. Cardiac performance is in turn dependent on the heart's own oxygen supply, which in some teleost species is partly delivered via a coronary circulation originating directly from the gills that perfuses the heart, and is crucial for cardiac, metabolic and locomotory capacities. It is currently unknown, however, how a compromised branchial blood flow (e.g., by angling-induced hook damage to the gills), constraining oxygen uptake and coronary blood flow, affects the energetically demanding parental care behaviours and reproductive fitness in fish. Here, we tested the hypothesis that blocking ¼ of the branchial blood flow and abolishing coronary blood flow would negatively affect parental care behaviours, cardiac performance (heart rate metrics, via implanted Star-Oddi heart rate loggers) and reproductive fitness of paternal smallmouth bass (Micropterus dolomieu). Our findings reveal that branchial/coronary ligation compromised reproductive fitness, as reflected by a lower proportion of broods reaching free-swimming fry and a tendency for a higher nest abandonment rate relative to sham operated control fish. While this was associated with a tendency for a reduced aggression in ligated fish, parental care behaviours were largely unaffected by the ligation. Moreover, the ligation did not impair any of the heart rate performance metrics. Our findings highlight that gill damage may compromise reproductive output of smallmouth bass populations during the spawning season. Yet, the mechanism(s) behind this finding remains elusive.
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Affiliation(s)
- Andreas Ekström
- Department of Biological and Environmental Sciences, University of Gothenburg, Gothenburg, Sweden.
| | - Tanya S Prystay
- Department of Biology and Institute of Environmental and Interdisciplinary Sciences, Carleton University, Ottawa, ON, Canada
| | - Alice E I Abrams
- Department of Biology and Institute of Environmental and Interdisciplinary Sciences, Carleton University, Ottawa, ON, Canada
| | - Annaïs Carbajal
- Department of Animal Health and Anatomy, Autonomous University of Barcelona, Barcelona, Spain
| | - Peter E Holder
- Department of Biology and Institute of Environmental and Interdisciplinary Sciences, Carleton University, Ottawa, ON, Canada
| | - Aaron J Zolderdo
- Department of Biology and Institute of Environmental and Interdisciplinary Sciences, Carleton University, Ottawa, ON, Canada; Department of Biology, Queen's University Biological Station, Elgin, ON, Canada
| | - Erik Sandblom
- Department of Biological and Environmental Sciences, University of Gothenburg, Gothenburg, Sweden
| | - Steven J Cooke
- Department of Biology and Institute of Environmental and Interdisciplinary Sciences, Carleton University, Ottawa, ON, Canada
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16
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Juguilon C, Wang Z, Wang Y, Enrick M, Jamaiyar A, Xu Y, Gadd J, Chen CW, Pu A, Kolz C, Ohanyan V, Chen YR, Hardwick J, Zhang Y, Chilian WM, Yin L. Mechanism of the switch from NO to H(2)O(2) in endothelium-dependent vasodilation in diabetes. Basic Res Cardiol 2022; 117:2. [PMID: 35024970 DOI: 10.1007/s00395-022-00910-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 12/28/2021] [Accepted: 12/29/2021] [Indexed: 02/06/2023]
Abstract
Coronary microvascular dysfunction is prevalent among people with diabetes and is correlated with cardiac mortality. Compromised endothelial-dependent dilation (EDD) is an early event in the progression of diabetes, but its mechanisms remain incompletely understood. Nitric oxide (NO) is the major endothelium-dependent vasodilatory metabolite in the healthy coronary circulation, but this switches to hydrogen peroxide (H2O2) in coronary artery disease (CAD) patients. Because diabetes is a significant risk factor for CAD, we hypothesized that a similar NO-to-H2O2 switch would occur in diabetes. Vasodilation was measured ex vivo in isolated coronary arteries from wild type (WT) and microRNA-21 (miR-21) null mice on a chow or high-fat/high-sugar diet, and B6.BKS(D)-Leprdb/J (db/db) mice using myography. Myocardial blood flow (MBF), blood pressure, and heart rate were measured in vivo using contrast echocardiography and a solid-state pressure sensor catheter. RNA from coronary arteries, endothelial cells, and cardiac tissues was analyzed via quantitative real-time PCR for gene expression, and cardiac protein expression was assessed via western blot analyses. Superoxide was detected via electron paramagnetic resonance. (1) Ex vivo coronary EDD and in vivo MBF were impaired in diabetic mice. (2) Nω-Nitro-L-arginine methyl ester, an NO synthase inhibitor (L-NAME), inhibited ex vivo coronary EDD and in vivo MBF in WT. In contrast, polyethylene glycol-catalase, an H2O2 scavenger (Peg-Cat), inhibited diabetic mouse EDD ex vivo and MBF in vivo. (3) miR-21 was upregulated in diabetic mouse endothelial cells, and the deficiency of miR-21 prevented the NO-to-H2O2 switch and ameliorated diabetic mouse vasodilation impairments. (4) Diabetic mice displayed increased serum NO and H2O2, upregulated mRNA expression of Sod1, Sod2, iNos, and Cav1, and downregulated Pgc-1α in coronary arteries, but the deficiency of miR-21 reversed these changes. (5) miR-21-deficient mice exhibited increased cardiac PGC-1α, PPARα and eNOS protein and reduced endothelial superoxide. (6) Inhibition of PGC-1α changed the mRNA expression of genes regulated by miR-21, and overexpression of PGC-1α decreased the expression of miR-21 in high (25.5 mM) glucose treated coronary endothelial cells. Diabetic mice exhibit a NO-to-H2O2 switch in the mediator of coronary EDD, which contributes to microvascular dysfunction and is mediated by miR-21. This study represents the first mouse model recapitulating the NO-to-H2O2 switch seen in CAD patients in diabetes.
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17
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Scarsoglio S, Ridolfi L. A review of multiscale 0D-1D computational modeling of coronary circulation with applications to cardiac arrhythmias. Rev Cardiovasc Med 2021; 22:1461-1469. [PMID: 34957785 DOI: 10.31083/j.rcm2204150] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2021] [Revised: 09/09/2021] [Accepted: 09/22/2021] [Indexed: 11/06/2022] Open
Abstract
Computational hemodynamics is becoming an increasingly important tool in clinical applications and surgical procedures involving the cardiovascular system. Aim of this review is to provide a compact summary of state of the art 0D-1D multiscale models of the arterial coronary system, with particular attention to applications related to cardiac arrhythmias, whose effects on the coronary circulation remain so far poorly understood. The focus on 0D-1D models only is motivated by the competitive computational cost, the reliability of the outcomes for the whole cardiovascular system, and the ability to directly account for cardiac arrhythmias. The analyzed studies show that cardiac arrhythmias by their own are able to promote significant alterations of the coronary hemodynamics, with a worse scenario as the mean heart rate (HR) increases. The present review can stimulate future investigation, both in computational and clinical research, devoted to the hemodynamic effects induced by cardiac arrhythmias on the coronary circulation.
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Affiliation(s)
- Stefania Scarsoglio
- Department of Mechanical and Aerospace Engineering, Politecnico di Torino, 10129 Torino, Italy
| | - Luca Ridolfi
- Department of Environmental, Land and Infrastructure Engineering, Politecnico di Torino, 10129 Torino, Italy
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18
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Ahmad A, Shelly-Cohen M, Corban MT, Murphree Jr DH, Toya T, Sara JD, Ozcan I, Lerman LO, Friedman PA, Attia ZI, Lerman A. Machine learning aids clinical decision-making in patients presenting with angina and non-obstructive coronary artery disease. Eur Heart J Digit Health 2021; 2:597-605. [PMID: 36713103 PMCID: PMC9707870 DOI: 10.1093/ehjdh/ztab084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 09/14/2021] [Indexed: 02/01/2023]
Abstract
Aims The current gold standard comprehensive assessment of coronary microvascular dysfunction (CMD) is through a limited-access invasive catheterization lab procedure. We aimed to develop a point-of-care tool to assist clinical guidance in patients presenting with chest pain and/or an abnormal cardiac functional stress test and with non-obstructive coronary artery disease (NOCAD). Methods and results This study included 1893 NOCAD patients (<50% angiographic stenosis) who underwent CMD evaluation as well as an electrocardiogram (ECG) up to 1-year prior. Endothelial-independent CMD was defined by coronary flow reserve (CFR) ≤2.5 in response to intracoronary adenosine. Endothelial-dependent CMD was defined by a maximal percent increase in coronary blood flow (%ΔCBF) ≤50% in response to intracoronary acetylcholine infusion. We trained algorithms to distinguish between the following outcomes: CFR ≤2.5, %ΔCBF ≤50, and the combination of both. Two classes of algorithms were trained, one depending on ECG waveforms as input, and another using tabular clinical data. Mean age was 51 ± 12 years and 66% were females (n = 1257). Area under the curve values ranged from 0.49 to 0.67 for all the outcomes. The best performance in our analysis was for the outcome CFR ≤2.5 with clinical variables. Area under the curve and accuracy were 0.67% and 60%. When decreasing the threshold of positivity, sensitivity and negative predictive value increased to 92% and 90%, respectively, while specificity and positive predictive value decreased to 25% and 29%, respectively. Conclusion An artificial intelligence-enabled algorithm may be able to assist clinical guidance by ruling out CMD in patients presenting with chest pain and/or an abnormal functional stress test. This algorithm needs to be prospectively validated in different cohorts.
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Affiliation(s)
- Ali Ahmad
- Department of Cardiovascular Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN 55902, USA
| | - Michal Shelly-Cohen
- Department of Cardiovascular Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN 55902, USA
| | - Michel T Corban
- Department of Cardiovascular Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN 55902, USA
| | - Dennis H Murphree Jr
- Department of Cardiovascular Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN 55902, USA
| | - Takumi Toya
- Department of Cardiovascular Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN 55902, USA,Department of Medicine, Division of Cardiology, National Defense Medical College, Tokorozawa, Saitama, Japan
| | - Jaskanwal D Sara
- Department of Cardiovascular Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN 55902, USA
| | - Ilke Ozcan
- Department of Cardiovascular Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN 55902, USA
| | - Lilach O Lerman
- Department of Medicine, Division of Nephrology and Hypertension, Mayo Clinic, 200 First Street SW, Rochester, MN 55902, USA
| | - Paul A Friedman
- Department of Cardiovascular Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN 55902, USA
| | - Zachi I Attia
- Department of Cardiovascular Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN 55902, USA
| | - Amir Lerman
- Department of Cardiovascular Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN 55902, USA,Corresponding author. Tel: +1 507 255 4152, Fax: +1 507 255 7798,
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19
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Demir OM, Rahman H, van de Hoef TP, Escaned J, Piek JJ, Plein S, Perera D. Invasive and non-invasive assessment of ischaemia in chronic coronary syndromes: translating pathophysiology to clinical practice. Eur Heart J 2021; 43:105-117. [PMID: 34516621 PMCID: PMC8757583 DOI: 10.1093/eurheartj/ehab548] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 03/22/2021] [Accepted: 08/05/2021] [Indexed: 01/10/2023] Open
Abstract
Intracoronary physiology testing has emerged as a valuable diagnostic approach in the management of patients with chronic coronary syndrome, circumventing limitations like inferring coronary function from anatomical assessment and low spatial resolution associated with angiography or non-invasive tests. The value of hyperaemic translesional pressure ratios to estimate the functional relevance of coronary stenoses is supported by a wealth of prognostic data. The continuing drive to further simplify this approach led to the development of non-hyperaemic pressure-based indices. Recent attention has focussed on estimating physiology without even measuring coronary pressure. However, the reduction in procedural time and ease of accessibility afforded by these simplifications needs to be counterbalanced against the increasing burden of physiological assumptions, which may impact on the ability to reliably identify an ischaemic substrate, the ultimate goal during catheter laboratory assessment. In that regard, measurement of both coronary pressure and flow enables comprehensive physiological evaluation of both epicardial and microcirculatory components of the vasculature, although widespread adoption has been hampered by perceived technical complexity and, in general, an underappreciation of the role of the microvasculature. In parallel, entirely non-invasive tools have matured, with the utilization of various techniques including computational fluid dynamic and quantitative perfusion analysis. This review article appraises the strengths and limitations for each test in investigating myocardial ischaemia and discusses a comprehensive algorithm that could be used to obtain a diagnosis in all patients with angina scheduled for coronary angiography, including those who are not found to have obstructive epicardial coronary disease.
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Affiliation(s)
- Ozan M Demir
- British Heart Foundation Centre of Excellence and National Institute for Health Research Biomedical Research Centre at the School of Cardiovascular Medicine and Sciences, King's College London, Westminster Bridge Road, London SE1 7EH, UK
| | - Haseeb Rahman
- British Heart Foundation Centre of Excellence and National Institute for Health Research Biomedical Research Centre at the School of Cardiovascular Medicine and Sciences, King's College London, Westminster Bridge Road, London SE1 7EH, UK
| | - Tim P van de Hoef
- Department of Clinical and Experimental Cardiology, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, Amsterdam 1105 AZ, Netherlands
| | - Javier Escaned
- Department of Cardiology, Hospital Clínico San Carlos IDISCC, Complutense University of Madrid, SpainCalle del Prof Martín Lagos, Madrid 28040, Spain
| | - Jan J Piek
- Department of Clinical and Experimental Cardiology, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, Amsterdam 1105 AZ, Netherlands
| | - Sven Plein
- Department of Biomedical Imaging Science, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9JT, UK
| | - Divaka Perera
- British Heart Foundation Centre of Excellence and National Institute for Health Research Biomedical Research Centre at the School of Cardiovascular Medicine and Sciences, King's College London, Westminster Bridge Road, London SE1 7EH, UK
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Maruta S, Usami K, Tajiri K, Otani M, Hiraya D, Watabe H, Hoshi T, Sato A, Ieda M. Vasospastic angina in a chronic myeloid leukemia patient treated with nilotinib. Cardiooncology 2021; 7:31. [PMID: 34452646 PMCID: PMC8393793 DOI: 10.1186/s40959-021-00119-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 08/21/2021] [Indexed: 01/07/2023]
Abstract
BACKGROUND Nilotinib, a second-generation BCR-ABL tyrosine kinase inhibitor (TKI), is highly effective in the treatment of patients with chronic myeloid leukemia (CML), despite being more vasculotoxic than older TKIs such as imatinib. Herein, we present a case of nilotinib-associated vasospastic angina confirmed by an acetylcholine spasm provocation test. CASE PRESENTATION A 62-year-old CML patient treated with 300 mg nilotinib twice daily complained of several episodes of rest angina and was hospitalized at our institution. Coronary angiography revealed no severe organic stenosis, and the acetylcholine spasm provocation test confirmed the diagnosis of vasospastic angina. Although treatment with a calcium channel blocker and nicorandil reduced the frequency of chest pain, angina symptoms continued to occur. At 10 months post discharge, the patient complained of increased frequency of angina; therefore, the nilotinib dosage was reduced to 150 mg twice daily. Consequently, the patient reported a significant improvement in chest symptoms. CONCLUSIONS This case report highlights the potential vasculotoxic effects of nilotinib. Cardiologists and hematologists should be vigilant for coronary artery spasm as a possible vascular adverse event caused by nilotinib.
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Affiliation(s)
- Shunsuke Maruta
- Department of Cardiology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Kyohei Usami
- Department of Cardiology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Kazuko Tajiri
- Department of Cardiology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan.
| | - Masafumi Otani
- Department of Cardiology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Daigo Hiraya
- Department of Cardiology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Hiroaki Watabe
- Department of Cardiology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Tomoya Hoshi
- Department of Cardiology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Akira Sato
- Department of Cardiology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Masaki Ieda
- Department of Cardiology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
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Schindler TH, Leucker TM, Bhandiwad A. Entering a new era of the identification and characterization of myocardial ischemic burden with 15O-water PET? Int J Cardiol 2021; 341:22-23. [PMID: 34329679 DOI: 10.1016/j.ijcard.2021.07.046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 07/21/2021] [Indexed: 11/17/2022]
Affiliation(s)
- Thomas H Schindler
- Mallinckrodt Institute of Radiology, Division of Nuclear Medicine, Cardiovascular Medicine, Washington University School of Medicine, St. Louis, MO, USA; Department of Medicine, Division of Cardiology, Johns Hopkins University, Baltimore, MD, USA; Cardiovascular Division, John T. Milliken Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO, USA.
| | - Thorsten M Leucker
- Department of Medicine, Division of Cardiology, Johns Hopkins University, Baltimore, MD, USA
| | - Anita Bhandiwad
- Cardiovascular Division, John T. Milliken Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO, USA
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22
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Yang Y, Hwang E, Lee SA, Lee S, Kim DH, Song JM, Kang DH. Effect of Rosuvastatin on Coronary Flow Reserve in Hypertensive Patients at Cardiovascular Risk. J Cardiovasc Imaging 2021; 29:255-262. [PMID: 34080332 PMCID: PMC8318809 DOI: 10.4250/jcvi.2020.0244] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 02/01/2021] [Accepted: 02/03/2021] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND It has been unclear whether statin therapy directly improves coronary flow reserve (CFR) in hypertensive patients at cardiovascular risk, independent of lifestyle modification and antihypertensive medications. METHODS In this double-blind, randomized controlled trial, we randomly assigned 95 hypertensive patients at cardiovascular risk to receive either rosuvastatin 10 mg or placebo for 12 months, in addition to antihypertensive therapy and lifestyle modification for hypercholesterolemia. Using Doppler echocardiography, coronary flow velocity in the distal left anterior descending artery was measured and CFR was calculated as the ratio of hyperemic to basal averaged peak diastolic flow velocity. The primary end point was change in CFR from baseline to 12 months follow-up. RESULTS Low-density lipoprotein-cholesterol was changed from 157 ± 23 to 84 ± 16 mg/dL in the rosuvastatin group (p < 0.001) and from 152 ± 19 to 144 ± 22 mg/dL in the control group (p = 0.041, but there were no significant differences between the treatment groups in the changes in C-reactive protein, high-density lipoprotein cholesterol, and blood pressures. CFR was changed from 3.03 ± 0.44 to 3.25 ± 0.49 in the rosuvastatin group (p < 0.001) and from 3.15 ± 0.54 to 3.17 ± 0.56 in the control group (p = 0.65). The primary end point of change in CFR was significantly different between the rosuvastatin group and the control group (0.216 ± 0.279 vs. 0.015 ± 0.217; p < 0.001). CONCLUSIONS Compared with lifestyle modification alone, addition of rosuvastatin significantly improved CFR in hypertensive patients at cardiovascular risk.
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Affiliation(s)
- Yujin Yang
- Division of Cardiology, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Korea
| | - EunSoon Hwang
- Division of Cardiology, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Korea
| | - Seung Ah Lee
- Division of Cardiology, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Korea
| | - Sahmin Lee
- Division of Cardiology, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Korea
| | - Dae Hee Kim
- Division of Cardiology, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Korea
| | - Jong Min Song
- Division of Cardiology, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Korea
| | - Duk Hyun Kang
- Division of Cardiology, Asan Medical Center, College of Medicine, University of Ulsan, Seoul, Korea.
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Kappel C, Chow J, Ahmed Z, Schwalm JD, Amin F. Cardiogenic shock in the context of newly diagnosed anomalous origin of the right coronary artery originating from the pulmonary artery: a case report. Eur Heart J Case Rep 2021; 5:ytab030. [PMID: 34113753 PMCID: PMC8186929 DOI: 10.1093/ehjcr/ytab030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 09/21/2020] [Accepted: 01/09/2021] [Indexed: 11/25/2022]
Abstract
Background Anomalous right coronary artery (RCA) from the pulmonary artery (ARCAPA) is a rare congenital heart abnormality with varying clinical presentations, for which multiple imaging modalities are often required for diagnosis. Case summary We present a case of a 76-year-old female presenting with 2 weeks of palpitations and shortness of breath who was found to be in rapid atrial fibrillation (AF) with congestive heart failure. Despite initial medical management, the patient developed cardiogenic shock with anuric renal failure. Emergent right and left heart catheterization did not demonstrate any significant obstructive coronary artery disease but showed severe right ventricular (RV) failure and raised the possibility of an ARCAPA. This diagnosis was further corroborated by findings on a subsequent transoesophageal echocardiogram. In view of profound decline and limited anticipated improvement, the patient ultimately decided to pursue comfort measures in a hospice setting. Discussion We postulate that the underlying aetiology of our patient’s shock state was multifactorial, notably progressive RCA-territory ischaemia and RV failure, sepsis, and new-onset uncontrolled AF. In adults, unrecognized congenital heart disease can uncommonly cause cardiogenic shock. In our case, echocardiography and invasive angiography were integrated for the diagnosis of ARCAPA given the clinical circumstances that limited the use of cardiac computed tomography angiography.
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Affiliation(s)
- Coralea Kappel
- Department of Medicine, McMaster University, 1200 Main Street West, Hamilton, ON L8S 4L8, Canada
| | - Justin Chow
- Department of Medicine, Division of Cardiology, McMaster University, 1200 Main Street West, Hamilton, ON L8S 4L8, Canada
| | - Zeeshan Ahmed
- Department of Medicine, Division of Cardiology, McMaster University, 1200 Main Street West, Hamilton, ON L8S 4L8, Canada
| | - Jon-David Schwalm
- Department of Medicine, Division of Cardiology, McMaster University, 1200 Main Street West, Hamilton, ON L8S 4L8, Canada.,Population Health Research Institute, 237 Barton Street East, Hamilton, ON L8L 2X2, Canada
| | - Faizan Amin
- Department of Medicine, Division of Cardiology, McMaster University, 1200 Main Street West, Hamilton, ON L8S 4L8, Canada.,Department of Medicine, Division of Critical Care Medicine, McMaster University, 1200 Main Street West, Hamilton, ON L8S 4L8, Canada
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Tamaru H, Fujii K, Fukunaga M, Imanaka T, Kawai K, Miki K, Horimatsu T, Nishimura M, Saita T, Sumiyoshi A, Shibuya M, Masuyama T, Ishihara M. Mechanisms of gradual pressure drop in angiographically normal left anterior descending and right coronary artery: Insights from wave intensity analysis. J Cardiol 2021; 78:72-78. [PMID: 33509679 DOI: 10.1016/j.jjcc.2021.01.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 12/17/2020] [Accepted: 01/03/2021] [Indexed: 01/09/2023]
Abstract
BACKGROUND This study evaluated the mechanism of decline in coronary pressure from the proximal to the distal part of the coronary arteries in the left anterior descending (LAD) versus the right coronary artery (RCA) from the insight of coronary hemodynamics using wave intensity analysis (WIA). METHODS Twelve patients with angiographically normal LAD and RCA were prospectively enrolled. Distal coronary pressure, mean aortic pressure, and average peak velocity were measured at 4 different positions: 9, 6, 3, and 0 cm distal from each coronary ostium. RESULTS The distal-to-proximal coronary pressure ratio during maximum hyperemia gradually decreased in proportion to the distance from the ostium (0.92±0.03 and 0.98±0.03 at 9 cm distal to the LAD and RCA ostium). WIA showed the dominant forward-traveling compression wave gradually decreased and the backward-traveling suction wave gradually decreased in proportion to the decrease in coronary pressure through the length of the non-diseased LAD but not the RCA. CONCLUSIONS The pushing wave and suction wave intensities on WIA were diminished in proportion to the distance from the ostium of the LAD despite the wave intensity not changing across the length of the RCA, which may lead to gradual intracoronary pressure drop in the angiographically normal LAD.
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Affiliation(s)
- Hiroto Tamaru
- Division of Cardiovascular Medicine and Coronary Heart Disease, Hyogo College of Medicine, Nishinomiya, Japan; Department of Cardiology, Higashi Takarazuka Satoh Hospital, Takarazuka, Japan
| | - Kenichi Fujii
- Division of Cardiology, Department of Medicine II, Kansai Medical University, Hirakata, Osaka 5731010, Japan.
| | - Masashi Fukunaga
- Division of Cardiovascular Medicine and Coronary Heart Disease, Hyogo College of Medicine, Nishinomiya, Japan
| | - Takahiro Imanaka
- Division of Cardiovascular Medicine and Coronary Heart Disease, Hyogo College of Medicine, Nishinomiya, Japan
| | - Kenji Kawai
- Division of Cardiovascular Medicine and Coronary Heart Disease, Hyogo College of Medicine, Nishinomiya, Japan
| | - Kojiro Miki
- Division of Cardiovascular Medicine and Coronary Heart Disease, Hyogo College of Medicine, Nishinomiya, Japan
| | - Tetsuo Horimatsu
- Division of Cardiovascular Medicine and Coronary Heart Disease, Hyogo College of Medicine, Nishinomiya, Japan
| | - Machiko Nishimura
- Division of Cardiovascular Medicine and Coronary Heart Disease, Hyogo College of Medicine, Nishinomiya, Japan
| | - Ten Saita
- Division of Cardiovascular Medicine and Coronary Heart Disease, Hyogo College of Medicine, Nishinomiya, Japan
| | - Akinori Sumiyoshi
- Division of Cardiovascular Medicine and Coronary Heart Disease, Hyogo College of Medicine, Nishinomiya, Japan
| | - Masahiko Shibuya
- Division of Cardiovascular Medicine and Coronary Heart Disease, Hyogo College of Medicine, Nishinomiya, Japan
| | - Tohru Masuyama
- Division of Cardiovascular Medicine and Coronary Heart Disease, Hyogo College of Medicine, Nishinomiya, Japan
| | - Masaharu Ishihara
- Division of Cardiovascular Medicine and Coronary Heart Disease, Hyogo College of Medicine, Nishinomiya, Japan
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Lahiri R, Chauhan U. Extra-cardiac collateral to an anomalous origin right coronary artery in a post-PTCA, post-CABG patient. Indian J Thorac Cardiovasc Surg 2021; 37:451-453. [PMID: 34220030 DOI: 10.1007/s12055-020-01127-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 11/28/2020] [Accepted: 12/21/2020] [Indexed: 10/22/2022] Open
Abstract
In the context of collateral circulation of the heart, the role of extra-cardiac collateral arteries has been thought to be negligible. We present a case in which such collateral vessel acted as a rescue, subsequent to a failed revascularisation attempt. With surgeons nowadays considering 'less is more' in terms of grafting in coronary artery bypass grafting (CABG), and more evidence arising in favour of medical therapy, we need to re-assess the role of these collateral vessels in the coronary circulation.
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Affiliation(s)
- Raja Lahiri
- Department of Cardiothoracic & Vascular Surgery, AIIMS Rishikesh, Rishikesh, Uttarakhand 249203 India
| | - Udit Chauhan
- Department of Radiodiagnosis, AIIMS Rishikesh, Rishikesh, Uttarakhand India
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26
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Aghajanian A, Zhang H, Buckley BK, Wittchen ES, Ma WY, Faber JE. Decreased inspired oxygen stimulates de novo formation of coronary collaterals in adult heart. J Mol Cell Cardiol 2021; 150:1-11. [PMID: 33038388 PMCID: PMC7855913 DOI: 10.1016/j.yjmcc.2020.09.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 09/13/2020] [Accepted: 09/25/2020] [Indexed: 01/18/2023]
Abstract
RATIONALE Collateral vessels lessen myocardial ischemia when acute or chronic coronary obstruction occurs. It has long been assumed that although native (pre-existing) collaterals enlarge in obstructive disease, new collaterals do not form in the adult. However, the latter was recently shown to occur after coronary artery ligation. Understanding the signals that drive this process is challenged by the difficulty in studying collateral vessels directly and the complex milieu of signaling pathways, including cell death, induced by ligation. Herein we show that hypoxemia alone is capable of inducing collateral vessels to form and that the novel gene Rabep2 is required. OBJECTIVE Hypoxia stimulates angiogenesis during embryonic development and in pathological states. We hypothesized that hypoxia also stimulates collateral formation in adult heart by a process that involves RABEP2, a recently identified protein required for formation of collateral vessels during development. METHODS AND RESULTS Exposure of mice to reduced FiO2 induced collateral formation that resulted in smaller infarctions following LAD ligation and that reversed on return to normoxia. Deletion of Rabep2 or knockdown of Vegfa inhibited formation. Hypoxia upregulated Rabep2, Vegfa and Vegfr2 in heart and brain microvascular endothelial cells (HBMVECs). Knockdown of Rabep2 impaired migration of HBMVECs. In contrast to systemic hypoxia, deletion of Rabep2 did not affect collateral formation induced by ischemic injury caused by LAD ligation. CONCLUSIONS Hypoxia induced formation of coronary collaterals by a process that required VEGFA and RABEP2, proteins also required for collateral formation during development. Knockdown of Rabep2 impaired cell migration, providing one potential mechanism for RABEP2's role in collateral formation. This appears specific to hypoxia, since formation after acute ischemic injury was unaffected in Rabep2-/- mice. These findings provide a novel model for studying coronary collateral formation, and demonstrate that hypoxia alone can induce new collaterals to form in adult heart.
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Affiliation(s)
- Amir Aghajanian
- Department of Cell Biology and Physiology and the McAllister Heart Institute, University of North Carolina at Chapel Hill, United States of America
| | - Hua Zhang
- Department of Cell Biology and Physiology and the McAllister Heart Institute, University of North Carolina at Chapel Hill, United States of America
| | - Brian K Buckley
- Department of Cell Biology and Physiology and the McAllister Heart Institute, University of North Carolina at Chapel Hill, United States of America
| | - Erika S Wittchen
- Department of Cell Biology and Physiology and the McAllister Heart Institute, University of North Carolina at Chapel Hill, United States of America
| | - Willa Y Ma
- Department of Cell Biology and Physiology and the McAllister Heart Institute, University of North Carolina at Chapel Hill, United States of America
| | - James E Faber
- Department of Cell Biology and Physiology and the McAllister Heart Institute, University of North Carolina at Chapel Hill, United States of America.
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Mikaeilvand A, Firuozi A, Basiri H, Varghaei A, Izadpanah P, Kojuri J, Abdi-Ardekani A, Attar A. Association of coronary artery dominance and mortality rate and complications in patients with ST-segment elevation myocardial infarction treated with primary percutaneous coronary intervention. J Res Med Sci 2020; 25:107. [PMID: 33824672 PMCID: PMC8019104 DOI: 10.4103/jrms.jrms_414_19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 04/29/2020] [Accepted: 07/13/2020] [Indexed: 11/04/2022]
Abstract
Background Percutaneous coronary intervention (PCI) is the treatment of choice for patients with ST-segment elevation myocardial infarction (STEMI). Effect of coronary artery dominance on the patients' outcome following primary PCI (PPCI) is not fully investigated. We investigated the association of coronary artery dominance with complications and 1-year mortality rate of PPCI. Materials and Methods In this retrospective study, patients with STEMI treated with PPCI from March 2016 to February 2018 were divided into three groups based on their coronary dominancy: left dominance (LD), right dominance (RD), and codominant. Demographic characteristics, medical history, results of physical examination, electrocardiography, angiography, and echocardiography were compared between the groups. Results Of 491 patients included in this study, 34 patients (7%) were LD and 22 patients (4.5%) were codominant. Accordingly, 54 propensity-matched RD patients were included in the analysis. The demographics and comorbidities of the three groups were not different (P > 0.05); however, all patients in the RD group had thrombolysis in myocardial infarction (TIMI) 3, while five patients in the LD and five patients in the codominant group had a TIMI ≤2 (P = 0.006). At admission, the median left ventricular ejection fraction (LVEF) was highest in RD patients and lowest in LD and codominant patients (34%, P = 0.009). There was no difference in terms of success or complications of PCI, in-hospital, and 1-year mortality rate (P > 0.05). Conclusion Patients with left coronary artery dominance had a higher value of indicators of worse outcomes, such as lower LVEF and TIMI ≤ 2, compared with RD patients, but not different rates of success or complications of PCI, in-hospital, and 1-year mortality. This finding may suggest that interventionists should prepare themselves with protective measures for no-reflow and slow-flow phenomenon and also mechanical circulatory support before performing PPCI in LD patients.
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Affiliation(s)
- Amir Mikaeilvand
- Department of Cardiology, Urmia University of Medical Sciences, Urmia, Iran
| | - Ata Firuozi
- Cardiovascular Intervention Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Hosseinali Basiri
- Cardiovascular Intervention Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
| | | | - Peyman Izadpanah
- Department of Cardiovascular Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Javad Kojuri
- Department of Cardiovascular Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Alireza Abdi-Ardekani
- Department of Cardiovascular Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Armin Attar
- Department of Cardiovascular Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
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28
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Wang YD, Chen WQ, Li Y, Li JM, Zhang J. [Related risk factors of PET/CT detected coronary microvascular disease in patients with chest pain and no obstructive coronary artery disease]. Zhonghua Xin Xue Guan Bing Za Zhi 2020; 48:942-947. [PMID: 33210866 DOI: 10.3760/cma.j.cn112148-20200409-00298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Objective: To explore the related factors of the coronary microvascular disease (CMD) diagnosed with positron emission tomography(PET)/CT in patients with chest pain and without obstructive coronary artery disease (NOCA). Methods: This study was a single-center retrospective cross-sectional study. Consecutive patients with chest pain and NOCA on coronary angiography, who underwent PET/CT quantitative myocardial blood flow measurements at TEDA International Cardiovascular Hospital from August 2018 to January 2019, were enrolled for this study. The diagnostic criteria for NOCA was the absence of coronary artery diameter stenosis ≥50% on coronary angiography. Clinical data, global left ventricular myocardial blood flow on stress and rest, and the coronary flow reserve (CFR) were analyzed. Patients were divided into two groups according to CFR. Patients with CFR<2 were defined as CMD group, and the rest were classified as control group. Pearson correlation analysis and Logistics regression analysis were used for exploring the risk factors of the CMD. Results: A total of 66 patients, with an mean age of (56.7±9.6) years, were included in the study, including 41 females (62%). There were 20 patients with CMD (30%). Body mass index (BMI) was significantly higher in CND group than in control group ((28.1±3.6) kg/m2 vs. (25.6±3.5) kg/m2, P=0.01). Total cholesterol (TC) and low density lipoprotein cholesterol (LDL-C) were also significantly higher in CMD group than in control group ((4.89±1.03) mmol/L vs. (4.30±1.02) mmol/L and (3.23±0.81) mmol/L vs. (2.71±0.95) mmol/L respectively, P=0.038). Pearson correlation analysis showed that CFR was moderately correlated with BMI (r=-0.45, P<0.001), and was weakly correlated with TC and LDL-C (r=-0.271 and r=-0.280, respectively, P<0.05). Multivariate logistic regression analysis showed that BMI (the risk of CMD increased by 1.528 times for every 5 kg/m2 increase in BMI, 95%CI 1.083-5.897, P<0.05) was an independent risk factor of CMD after adjusted by gender, hypertension, diabetic mellites and LDL-C. Conclusion: For patients with NOCA and chest pain, high BMI is independent risk factor of CMD diagnosed by PET/CT.
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Affiliation(s)
- Y D Wang
- Department of Cardiology, TEDA International Cardiovascular Hospital and Tianjin Medical University Cardiovascular Clinical Institute, Tianjin 300457, China
| | - W Q Chen
- Department of Cardiology, TEDA International Cardiovascular Hospital and Tianjin Medical University Cardiovascular Clinical Institute, Tianjin 300457, China
| | - Y Li
- Department of Cardiology, Chengde Medical College, Chengde 067000, China
| | - J M Li
- Department of Nuclear Medicine, TEDA International Cardiovascular Hospital and Tianjin Medical University Cardiovascular Clinical Institute, Tianjin 300457, China
| | - J Zhang
- Department of Cardiology, TEDA International Cardiovascular Hospital and Tianjin Medical University Cardiovascular Clinical Institute, Tianjin 300457, China
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Nakayama M, Uchiyama T, Hijikata N, Kobori Y, Tanaka N, Iwasaki K. Effect of QTU prolongation on hyperemic instantaneous wave-free ratio value: a prospective single-center study. Heart Vessels 2020; 35:909-917. [PMID: 31989184 PMCID: PMC7256076 DOI: 10.1007/s00380-020-01562-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 01/17/2020] [Indexed: 12/16/2022]
Abstract
We hypothesized that in patients with QT prolongation, resistance might not decrease in the wave-free period, because QTU prolongation cannot be detected by instantaneous wave-free ratio (iFR) analysis software. We investigated whether corrected QTU (QTUc) prolongation affects the hyperemic iFR value. Forty-two consecutive patients with intermediate stenosis (≥ 50%) in the left anterior descending coronary artery (LAD) were analyzed. Fractional flow reserve (FFR) and hyperemic iFR were simultaneously and continuously recorded with intravenous adenosine triphosphate (ATP) and papaverine infusions. In 17 patients with stenosis in the proximal LAD, coronary flow was measured. Patients were divided into two groups according to the median absolute deviation of the QTUc by ATP administration/QTUc by papaverine administration. FFR, hyperemic iFR, and flow data were compared between each stimulus and group. Moreover, influences of pressure and electrocardiogram parameters on differences in iFR values under ATP and papaverine administration were compared between the following two groups (group 1: the absolute difference of hyperemic iFR values between ATP and papaverine administration is ≤ 0.05; group 2: that is > 0.05). The paired t test and t test were used in analysis. Hyperemic iFR values of patients under the use of papaverine were lower than those of patients under the use of ATP when QTUc was more prolonged by papaverine administration than by ATP administration (ATP 0.74 ± 0.14, papaverine 0.71 ± 0.15, P = 0.025). No significant differences were observed in the FFR value and flow data between the groups. Regarding QTU, QTUc, and QTUc by ATP/QTUc by papaverine, significant differences were observed between group 1 and group 2. Pressure parameters did not induce significant differences. QTUc prolongation induced by papaverine was associated with lower hyperemic iFR values. An iFR-based assessment might lead to inappropriate treatment of patients with QTUc prolongation.
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Affiliation(s)
- Masafumi Nakayama
- Cardiovascular Center, Todachuo General Hospital, Toda, Japan
- Cooperative Major in Advanced Biomedical Sciences, Joint Graduate School of Tokyo Women's Medical University and Waseda University, Waseda University, 2-2 Wakamatsucho, Shinjuku, Tokyo, 162-8480, Japan
| | | | | | - Yuichi Kobori
- Cardiovascular Center, Todachuo General Hospital, Toda, Japan
| | - Nobuhiro Tanaka
- Department of Cardiology, Tokyo Medical University Hachiouji Medical Center, Hachiouji, Japan
| | - Kiyotaka Iwasaki
- Cooperative Major in Advanced Biomedical Sciences, Joint Graduate School of Tokyo Women's Medical University and Waseda University, Waseda University, 2-2 Wakamatsucho, Shinjuku, Tokyo, 162-8480, Japan.
- Department of Modern Mechanical Engineering, Waseda University, Shinjuku, Tokyo, Japan.
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30
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Levy BI, Heusch G, Camici PG. The many faces of myocardial ischaemia and angina. Cardiovasc Res 2020; 115:1460-1470. [PMID: 31228187 DOI: 10.1093/cvr/cvz160] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 04/25/2019] [Accepted: 06/17/2019] [Indexed: 12/13/2022] Open
Abstract
Obstructive disease of the epicardial coronary arteries is the main cause of angina. However, a number of patients with anginal symptoms have normal coronaries or non-obstructive coronary artery disease (CAD) despite electrocardiographic evidence of ischaemia during stress testing. In addition to limited microvascular vasodilator capacity, the coronary microcirculation of these patients is particularly sensitive to vasoconstrictor stimuli, in a condition known as microvascular angina. This review briefly summarizes the determinants and control of coronary blood flow (CBF) and myocardial perfusion. It subsequently analyses the mechanisms responsible for transient myocardial ischaemia: obstructive CAD, coronary spasm and coronary microvascular dysfunction in the absence of epicardial coronary lesions, and variable combinations of structural anomalies, impaired endothelium-dependent and/or -independent vasodilation, and enhanced perception of pain. Lastly, we exemplify mechanism of angina during tachycardia. Distal to a coronary stenosis, coronary dilator reserve is already recruited and can be nearly exhausted at rest distal to a severe stenosis. Increased heart rate reduces the duration of diastole and thus CBF when metabolic vasodilation is no longer able to increase CBF. The increase in myocardial oxygen consumption and resulting metabolic vasodilation in adjacent myocardium without stenotic coronary arteries further acts to divert blood flow away from the post-stenotic coronary vascular bed through collaterals.
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Affiliation(s)
- Bernard I Levy
- Inserm U970 and Vessels and Blood Institute, 8 Rue Guy Patin, Paris, France
| | - Gerd Heusch
- Institute for Pathophysiology, West German Heart and Vascular Center, Universitätsklinikum Essen, Essen, Germany
| | - Paolo G Camici
- Vita Salute University and San Raffaele Hospital, Milan, Italy
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31
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Kasumi I, Fujii K, Satoru O, Shin T, Katsuyuki H, Hiroto T, Rui I, Shingo Y, Sho N, Wataru Y, Hirofumi K, Yusuke T, Mikio K, Yuji S, Yorihiko H. Influence of caffeine intake on intravenous adenosine-induced fractional flow reserve. J Cardiol 2020; 76:472-478. [PMID: 32532583 DOI: 10.1016/j.jjcc.2020.05.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 04/29/2020] [Accepted: 05/04/2020] [Indexed: 12/19/2022]
Abstract
BACKGROUND This study evaluated whether caffeine abstention is required before fractional flow reserve (FFR) measurement by intravenous adenosine triphosphate (ATP) administration in Japanese patients. METHODS This study was a subanalysis of a previously published study and a total of 208 intermediate lesions that underwent FFR measurements were enrolled for this analysis. Hyperemia was induced by continuous intravenous ATP infusion at 150 μg/kg/min (IVATP150) and 210 μg/kg/min (IVATP210), and by intracoronary administration of nicorandil 2 mg (ICNIC2mg) as a reference standard. RESULTS The degree of change in the FFR value after ICNIC2mg and IVATP210 was similar between the caffeine and non-caffeine groups (0.00 ± 0.02 vs. 0.01 ± 0.02). In patients who consumed caffeine before the FFR measurement, the degree of FFR change was independent of the time interval (<12 h, 12-24 h, and 24-48 h) between caffeine intake and catheterization both after IVATP150 and ICNIC2mg and after IVATP210 and ICNIC2mg. CONCLUSION When compared with the FFR value after ICNIC2mg, the degree of change in the FFR value after IVATP210 were similar regardless of caffeine intake. Strict caffeine abstention before intravenous ATP-induced FFR measurement may not be required in clinical practice.
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Affiliation(s)
- Ishibuchi Kasumi
- Department of Cardiology, Higashi Takarazuka Satoh Hospital, Takarazuka, Japan
| | - Kenichi Fujii
- Department of Cardiology, Higashi Takarazuka Satoh Hospital, Takarazuka, Japan; Department of Medicine II, Kansai Medical University, Hirakata, Japan.
| | - Otsuji Satoru
- Department of Cardiology, Higashi Takarazuka Satoh Hospital, Takarazuka, Japan
| | - Takiuchi Shin
- Department of Cardiology, Higashi Takarazuka Satoh Hospital, Takarazuka, Japan
| | - Hasegawa Katsuyuki
- Department of Cardiology, Higashi Takarazuka Satoh Hospital, Takarazuka, Japan
| | - Tamaru Hiroto
- Department of Cardiology, Higashi Takarazuka Satoh Hospital, Takarazuka, Japan
| | - Ishii Rui
- Department of Cardiology, Higashi Takarazuka Satoh Hospital, Takarazuka, Japan
| | - Yasuda Shingo
- Department of Cardiology, Higashi Takarazuka Satoh Hospital, Takarazuka, Japan
| | - Nakabayashi Sho
- Department of Cardiology, Higashi Takarazuka Satoh Hospital, Takarazuka, Japan
| | - Yamamoto Wataru
- Department of Cardiology, Higashi Takarazuka Satoh Hospital, Takarazuka, Japan
| | - Kusumoto Hirofumi
- Department of Cardiology, Higashi Takarazuka Satoh Hospital, Takarazuka, Japan
| | - Taniguchi Yusuke
- Department of Cardiology, Higashi Takarazuka Satoh Hospital, Takarazuka, Japan
| | - Kakishita Mikio
- Department of Cardiology, Higashi Takarazuka Satoh Hospital, Takarazuka, Japan
| | - Shimatani Yuji
- Department of Cardiology, Higashi Takarazuka Satoh Hospital, Takarazuka, Japan
| | - Higashino Yorihiko
- Department of Cardiology, Higashi Takarazuka Satoh Hospital, Takarazuka, Japan
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Obata JE, Horikoshi T, Nakamura T, Kugiyama K. Sustained endothelial dysfunction in the infarct-related coronary artery is associated with left ventricular adverse remodeling in survivors of ST-segment elevation myocardial infarction. J Cardiol 2019; 75:261-269. [PMID: 31447080 DOI: 10.1016/j.jjcc.2019.08.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 07/30/2019] [Accepted: 08/02/2019] [Indexed: 01/27/2023]
Abstract
BACKGROUND Ischemia-reperfusion causes endothelial injury and dysfunction in the infarct-related coronary artery (IRA). Using serial assessment of coronary endothelial vasomotor function and left ventriculography (LVG), this study prospectively investigated the clinical impact of endothelial vasomotor dysfunction in the patent IRA on left ventricular (LV) remodeling in survivors of ST-elevation myocardial infarction (STEMI). METHODS This study included 78 patients with STEMI due to occlusion of the left anterior descending coronary artery (LAD) and successful reperfusion therapy with percutaneous coronary intervention. All of them had LV ejection fraction (LVEF) <55%. LVG and the vasomotor responses to acetylcholine (ACh) in the LAD were examined within 2 weeks (1st test) and 6 months (2nd test) after MI. Cut-off values for coronary vasomotor dysfunction in response to ACh were based on the lower 10% of the distribution of coronary vasomotor responses to ACh in 20 control subjects. RESULTS LV adverse remodeling, defined as a >10% increase in either LV end-diastolic volume index (LVEDVI) and/or end-systolic volume index (LVESVI) from the 1st to the 2nd test, occurred in 21 (70%) of 30 patients with sustained impairment of the coronary flow response to ACh at both the 1st and 2nd tests and 14 (29%) of 48 in the other coronary flow response group (p < 0.01). In multivariate logistic regression analysis, a >10% increase in LVEDVI and LVESVI was respectively associated with sustained impairment of the coronary diameter and flow responses to ACh (OR 4.9 and 3.5, 95% CI 1.7-14.1 and 1.1-10.9, p < 0.01 and p = 0.03, respectively), that was independent of hypertension, peak creatine phosphokinase, and the baseline coronary flow response to ACh at the 1st test. CONCLUSIONS Sustained endothelial vasomotor dysfunction in the IRA was associated with LV adverse remodeling in STEMI survivors with successful reperfusion therapy.
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Affiliation(s)
- Jun-Ei Obata
- Department of Internal Medicine II, University of Yamanashi, Faculty of Medicine, Chuo, Yamanashi, Japan
| | - Takeo Horikoshi
- Department of Internal Medicine II, University of Yamanashi, Faculty of Medicine, Chuo, Yamanashi, Japan
| | - Takamitsu Nakamura
- Department of Internal Medicine II, University of Yamanashi, Faculty of Medicine, Chuo, Yamanashi, Japan
| | - Kiyotaka Kugiyama
- Department of Internal Medicine II, University of Yamanashi, Faculty of Medicine, Chuo, Yamanashi, Japan.
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Ishibuchi K, Fujii K, Otsuji S, Takiuchi S, Hasegawa K, Tamaru H, Ishii R, Yasuda S, Nakabayashi S, Yamamoto W, Kusumoto H, Taniguchi Y, Kakishita M, Shimatani Y, Higashino Y. Utility and Validity of Intracoronary Administration of Nicorandil Alone for the Measurement of Fractional Flow Reserve in Patients With Intermediate Coronary Stenosis. Circ J 2019; 83:2010-2016. [PMID: 31413232 DOI: 10.1253/circj.cj-19-0421] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND Intracoronary (IC) administration of nicorandil has been proposed as an alternative choice of hyperemic agent for fractional flow reserve (FFR) measurements. This study evaluated the utility and validity of IC nicorandil administration alone to induce maximal hyperemia.Methods and Results:Two-hundred-seven patients with coronary artery disease listed for coronary angiography with FFR were prospectively enrolled. FFR was measured after (1) IC administration of nicorandil 2 mg (ICNIC2 mg); (2) continuous intravenous (IV) adenosine triphosphatase (ATP) infusion at 150 μg/kg/min (IVATP150); (3) IV ATP infusion at 210 μg/kg/min (IVATP210); (4) IC administration of 0.5 mg nicorandil during IVATP150 (ICNIC0.5 mg+IVATP150); (5) IC administration of 1 mg nicorandil during IVATP150 (ICNIC1 mg+IVATP150); and (6) IC administration of 2 mg nicorandil during IVATP150 (ICNIC2 mg+IVATP150). The average FFR values and the rate of achieving maximum hyperemia after ICNIC2 mg, IVATP150, IVATP210, ICNIC0.5 mg+IVATP150, ICNIC1 mg+IVATP150, and ICNIC2 mg+IVATP150 were 0.85±0.08, 0.89±0.08, 0.85±0.09, 0.84±0.08, 0.83±0.08, 0.83±0.08 (P<0.01), and 92%, 54%, 91%, 96%, 99%, 99% (P<0.01), respectively. The incidence of systolic aortic pressure drop, chest discomfort, and transient atrioventricular block increased in a dose-dependent manner after IV ATP infusion, but almost no adverse effects were observed after ICNIC2 mg. CONCLUSIONS ICNIC2 mg produced a more pronounced hyperemia than continuous IV ATP, and might be the preferred method for assessment of FFR.
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Affiliation(s)
| | - Kenichi Fujii
- Department of Cardiology, Higashi Takarazuka Satoh Hospital.,Department of Medicine II, Kansai Medical University
| | - Satoru Otsuji
- Department of Cardiology, Higashi Takarazuka Satoh Hospital
| | - Shin Takiuchi
- Department of Cardiology, Higashi Takarazuka Satoh Hospital
| | | | - Hiroto Tamaru
- Department of Cardiology, Higashi Takarazuka Satoh Hospital
| | - Rui Ishii
- Department of Cardiology, Higashi Takarazuka Satoh Hospital
| | - Shingo Yasuda
- Department of Cardiology, Higashi Takarazuka Satoh Hospital
| | | | | | | | | | | | - Yuji Shimatani
- Department of Cardiology, Higashi Takarazuka Satoh Hospital
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Hausenloy DJ, Chilian W, Crea F, Davidson SM, Ferdinandy P, Garcia-Dorado D, van Royen N, Schulz R, Heusch G. The coronary circulation in acute myocardial ischaemia/reperfusion injury: a target for cardioprotection. Cardiovasc Res 2019; 115:1143-1155. [PMID: 30428011 PMCID: PMC6529918 DOI: 10.1093/cvr/cvy286] [Citation(s) in RCA: 140] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2018] [Revised: 10/15/2018] [Accepted: 11/14/2018] [Indexed: 12/11/2022] Open
Abstract
The coronary circulation is both culprit and victim of acute myocardial infarction. The rupture of an epicardial atherosclerotic plaque with superimposed thrombosis causes coronary occlusion, and this occlusion must be removed to induce reperfusion. However, ischaemia and reperfusion cause damage not only in cardiomyocytes but also in the coronary circulation, including microembolization of debris and release of soluble factors from the culprit lesion, impairment of endothelial integrity with subsequently increased permeability and oedema formation, platelet activation and leucocyte adherence, erythrocyte stasis, a shift from vasodilation to vasoconstriction, and ultimately structural damage to the capillaries with eventual no-reflow, microvascular obstruction (MVO), and intramyocardial haemorrhage (IMH). Therefore, the coronary circulation is a valid target for cardioprotection, beyond protection of the cardiomyocyte. Virtually all of the above deleterious endpoints have been demonstrated to be favourably influenced by one or the other mechanical or pharmacological cardioprotective intervention. However, no-reflow is still a serious complication of reperfused myocardial infarction and carries, independently from infarct size, an unfavourable prognosis. MVO and IMH can be diagnosed by modern imaging technologies, but still await an effective therapy. The current review provides an overview of strategies to protect the coronary circulation from acute myocardial ischaemia/reperfusion injury. This article is part of a Cardiovascular Research Spotlight Issue entitled 'Cardioprotection Beyond the Cardiomyocyte', and emerged as part of the discussions of the European Union (EU)-CARDIOPROTECTION Cooperation in Science and Technology (COST) Action, CA16225.
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Affiliation(s)
- Derek J Hausenloy
- Cardiovascular & Metabolic Disorders Program, Duke-National University of Singapore Medical School, Singapore, Singapore
- National Heart Research Institute Singapore, National Heart Centre, Singapore, Singapore
- Yong Loo Lin School of Medicine, National University Singapore, Singapore, Singapore
- The Hatter Cardiovascular Institute, University College London, London, UK
- The National Institute of Health Research, University College London Hospitals Biomedical Research Centre, Research & Development, London, UK
- Department of Cardiology, Barts Heart Centre, St Bartholomew’s Hospital, London, UK
| | - William Chilian
- Department of Integrative Medical Sciences, Northeast Ohio Medical University, 4209 State Route 44, Rootstown, USA
| | - Filippo Crea
- Department of Cardiovascular and Thoracic Sciences, F. Policlinico Gemelli—IRCCS, Università Cattolica Sacro Cuore, Roma, Italy
| | - Sean M Davidson
- The Hatter Cardiovascular Institute, University College London, London, UK
| | - Peter Ferdinandy
- Department of Pharmacology and Pharmacotherapy, Semmelweis University, Budapest, Hungary
- Pharmahungary Group, Szeged, Hungary
| | - David Garcia-Dorado
- Department of Cardiology, Vascular Biology and Metabolism Area, Vall d’Hebron University Hospital and Research Institute (VHIR), Universitat Autónoma de Barcelona, Barcelona, Spain
- Instituto CIBER de Enfermedades Cardiovasculares (CIBERCV), Instituto de Salud Carlos III, Madrid, Spain
| | - Niels van Royen
- Department of Cardiology, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Rainer Schulz
- Institute of Physiology, Justus-Liebig University Giessen, Giessen, Germany
| | - Gerd Heusch
- Institute for Pathophysiology, West German Heart and Vascular Center, University of Essen Medical School, Essen, Germany
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Mechelinck M, Hein M, Bellen S, Rossaint R, Roehl AB. Adaptation to acute pulmonary hypertension in pigs. Physiol Rep 2019; 6. [PMID: 29512293 PMCID: PMC5840392 DOI: 10.14814/phy2.13605] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Revised: 01/04/2018] [Accepted: 01/09/2018] [Indexed: 01/29/2023] Open
Abstract
The extent of right ventricular compensation compared to the left ventricle is restricted and varies among individuals, which makes it difficult to define. While establishing a model of acute pulmonary hypertension in pigs we observed two different kinds of compensation in our animals. Looking deeper into the hemodynamic data we tried to delineate why some animals could compensate and others could not. Pulmonary hypertension (mean pressure 45 mmHg) was induced gradually by infusion of a stable thromboxane A2 analogue U46619 in a porcine model (n = 22). Hemodynamic data (pressure‐volume loops, strain‐analysis of echocardiographic data and coronary flow measurements) were evaluated retrospectively for the short‐term right ventricular compensatory mechanisms and limits (Roehl et al. [2012] Acta Anaesthesiol. Scand., 56:449–58) 10 animals showed stable arterial blood pressures, whereas 12 pigs exhibited a significant drop of 16.4 ± 9.9 mmHg. Cardiac output and heart rate were comparable in both groups. In contrast, right ventricular contractility and coronary flow only rose in the stable group. The unchanging values in the decrease group correlated with an increasing ST‐segment depression and a loss of ventricular synchronism and resulted in a larger septum bulging to the right ventricle. Simultaneously, a reduced left‐ventricular end‐diastolic volume and a missing improvement in contractility in the posterior septal and inferior free wall of the left ventricle have been observed. Our findings suggest that right ventricular compensation during acute pulmonary hypertension is strongly dependent on the individual capability to increase coronary flow. The cause for inter‐individual variability could be the dimension and reactivity of the coronary system.
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Affiliation(s)
- Mare Mechelinck
- Department of Anesthesiology, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - Marc Hein
- Department of Anesthesiology, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - Sven Bellen
- Department of Anesthesiology, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - Rolf Rossaint
- Department of Anesthesiology, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - Anna B Roehl
- Department of Anesthesiology, Medical Faculty, RWTH Aachen University, Aachen, Germany
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36
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Kawase Y, Matsuo H, Akasaka T, Shiono Y, Tanaka N, Amano T, Kozuma K, Nakamura M, Yokoi H, Kobayashi Y, Ikari Y. Clinical use of physiological lesion assessment using pressure guidewires: an expert consensus document of the Japanese Association of Cardiovascular Intervention and Therapeutics. Cardiovasc Interv Ther 2018; 34:85-96. [PMID: 30588572 DOI: 10.1007/s12928-018-0559-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 11/20/2018] [Indexed: 01/10/2023]
Abstract
In this document, the background, concept, and current evidence are briefly summarized. The focus is on the clinical application of physiological lesion assessment from a practical standpoint for facilities that do not have ample experience. Finally, the characteristics of new resting indexes are summarized.
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Sun WT, Wang XC, Novakovic A, Wang J, He GW, Yang Q. Protection of dilator function of coronary arteries from homocysteine by tetramethylpyrazine: Role of ER stress in modulation of BK Ca channels. Vascul Pharmacol 2018; 113:27-37. [PMID: 30389615 DOI: 10.1016/j.vph.2018.10.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 09/10/2018] [Accepted: 10/27/2018] [Indexed: 01/06/2023]
Abstract
OBJECTIVES We recently reported the involvement of ER stress-mediated BKCa channel inhibition in homocysteine-induced coronary dilator dysfunction. In another study, we demonstrated that tetramethylpyrazine (TMP), an active ingredient of the Chinese herb Chuanxiong, possesses potent anti-ER stress capacity. The present study investigated whether TMP protects BKCa channels from homocysteine-induced inhibition and whether suppression of ER stress is a mechanism contributing to the protection. Furthermore, we explored the signaling transduction involved in TMP-conferred protection on BKCa channels. METHODS BKCa channel-mediated relaxation was studied in porcine small coronary arteries. Expressions of BKCa channel subunits, ER stress molecules, and E3 ubiquitin ligases, as well as BKCa ubiquitination were determined in porcine coronary arterial smooth muscle cells (PCASMCs). Whole-cell BKCa currents were recorded. RESULTS Exposure of PCASMCs to homocysteine or the chemical ER stressor tunicamycin increased the expression of ER stress molecules, which was significantly inhibited by TMP. Suppression of ER stress by TMP preserved the BKCa β1 protein level and restored the BKCa current in PCASMCs, concomitant with an improved BKCa-mediated dilatation in coronary arteries. TMP attenuated homocysteine-induced BKCa β1 protein ubiquitination, in which inhibition of ER stress-mediated FoxO3a activation and FoxO3a-dependent atrogin-1 and Murf-1 was involved. CONCLUSIONS Reversal of BKCa channel inhibition via suppressing ER stress-mediated loss of β1 subunits contributes to the protective effect of TMP against homocysteine on coronary dilator function. Inhibition of FoxO3a-dependent ubiquitin ligases is involved in TMP-conferred normalization of BKCa β1 protein level. These results provide new mechanistic insights into the cardiovascular benefits of TMP.
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Affiliation(s)
- Wen-Tao Sun
- Center for Basic Medical Research, TEDA International Cardiovascular Hospital, Chinese Academy of Medical Sciences, Tianjin, China
| | - Xiang-Chong Wang
- Department of Pharmacology, Hebei University of Chinese Medicine, Shijiazhuang, Hebei, China
| | - Aleksandra Novakovic
- Department of Pharmacology, Faculty of Pharmacy, University of Belgrade, Belgrade, Serbia
| | - Jun Wang
- Center for Basic Medical Research, TEDA International Cardiovascular Hospital, Chinese Academy of Medical Sciences, Tianjin, China
| | - Guo-Wei He
- Center for Basic Medical Research, TEDA International Cardiovascular Hospital, Chinese Academy of Medical Sciences, Tianjin, China
| | - Qin Yang
- Center for Basic Medical Research, TEDA International Cardiovascular Hospital, Chinese Academy of Medical Sciences, Tianjin, China.
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Beltrame JF, Pasupathy S, Tavella R, White HD. How Can You Have a Myocardial Infarction Without Significant Coronary Artery Disease? Heart Lung Circ 2018; 27:649-651. [PMID: 29706179 DOI: 10.1016/j.hlc.2018.03.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Accepted: 03/04/2018] [Indexed: 02/06/2023]
Affiliation(s)
- John F Beltrame
- Discipline of Medicine, University of Adelaide, Adelaide, SA, Australia; Cardiology Department, Central Adelaide Local Health Network, Adelaide, SA, Australia; Cardiology Department, Lyell McEwin Hospital, Adelaide, SA, Australia.
| | - Sivabaskari Pasupathy
- Discipline of Medicine, University of Adelaide, Adelaide, SA, Australia; Cardiology Department, Central Adelaide Local Health Network, Adelaide, SA, Australia
| | - Rosanna Tavella
- Discipline of Medicine, University of Adelaide, Adelaide, SA, Australia; Cardiology Department, Central Adelaide Local Health Network, Adelaide, SA, Australia
| | - Harvey D White
- Green Lane Cardiovascular Service, Auckland City Hospital, Auckland, New Zealand
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Boslett J, Helal M, Chini E, Zweier JL. Genetic deletion of CD38 confers post-ischemic myocardial protection through preserved pyridine nucleotides. J Mol Cell Cardiol 2018; 118:81-94. [PMID: 29476764 PMCID: PMC6699759 DOI: 10.1016/j.yjmcc.2018.02.015] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 02/02/2018] [Accepted: 02/20/2018] [Indexed: 12/27/2022]
Abstract
Following the onset of ischemia/reperfusion (I/R), CD38 activation occurs and is associated with depletion of NAD(P)(H) in the heart as well as myocardial injury and endothelial dysfunction. Studies with pharmacological inhibitors suggest that the NADP+-hydrolyzing ability of CD38 can deplete the NAD(P)(H) pools. However, there is a need for more specific studies on the importance of CD38 and its role in the process of endothelial dysfunction and myocardial injury in the post-ischemic heart. Therefore, experiments were performed in hearts of mice with global gene knockout of CD38. Isolated perfused CD38-/- and wild type (WT) mouse hearts were studied to determine the link between CD38 activation, the levels of NADP(H), endothelial dysfunction, and myocardial injury after I/R. Genetic deletion of CD38 preserves the myocardial and endothelial NADP(H) pools compared to WT. Whole heart BH4 levels in CD38-/- hearts were also preserved. Post-ischemic levels of cGMP were greatly depleted in WT hearts, but preserved to near baseline levels in CD38-/- hearts. The preservation of these metabolite pools in CD38-/- hearts was accompanied by near full recovery of NOS-dependent coronary flow, while in WT hearts, severe impairment of endothelial function and NOS uncoupling occurred with decreased NO and enhanced superoxide generation. CD38-/- hearts also exhibited marked protection against I/R with preserved glutathione levels, increased recovery of left ventricular contractile function, decreased myocyte enzyme release, and decreased infarct size. Thus, CD38 activation causes post-ischemic depletion of NADP(H) within the heart, with severe depletion from the endothelium, resulting in endothelial dysfunction and myocardial injury.
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Affiliation(s)
- James Boslett
- Department of Internal Medicine, Davis Heart & Lung Research Institute, College of Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Moustafa Helal
- Department of Internal Medicine, Davis Heart & Lung Research Institute, College of Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Eduardo Chini
- Signal Transduction Laboratory, Kogod Aging Center, Department of Anesthesiology, Mayo Clinic College of Medicine, Rochester, MN 55905, USA
| | - Jay L Zweier
- Department of Internal Medicine, Davis Heart & Lung Research Institute, College of Medicine, The Ohio State University, Columbus, OH 43210, USA.
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Ding S, Shi Y, Sun X, Cao Q, Dai H, Guan J. Contrast agent dose and slow/no-reflow in percutaneous coronary interventions : A case-control study of patients with non-ST-segment elevation acute coronary syndromes. Herz 2019; 44:69-75. [PMID: 29637230 DOI: 10.1007/s00059-018-4692-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 01/21/2018] [Accepted: 01/24/2018] [Indexed: 10/17/2022]
Abstract
BACKGROUND The angiographic slow/no-reflow phenomenon after primary percutaneous coronary intervention carries a poor prognosis for patients with non-ST-segment elevation acute coronary syndrome (NSTEACS). There is evidence that contrast agents cause endothelial dysfunction, myocardial cell damage, and coronary spasms. We hypothesized that the contrast agent dose may be related to slow/no-reflow in patients with NSTEACS undergoing percutaneous transluminal coronary angioplasty and stent (PTCA + stent). PATIENTS AND METHODS We enrolled 3369 patients with NSTEACS who underwent PTCA + stent only in the culprit vessel for the first time from September 2007 to May 2017 in this study. Coronary blood flow of ≤TIMI grade 2 after PTCA + stent was defined as slow/no-reflow. The relationship between the contrast agent dose and slow/no-reflow phenomenon was analyzed by multivariate conditional logistic regression and smooth curve fitting. RESULTS In multivariable conditional logistic regression analysis, the contrast agent dose was found to be an independent risk factor for slow/no-reflow after adjusting for the number of stents and the thrombus burden (OR: 1.0112; 95% CI: 1.0049-1.0176; p < 0.0001), and after adjusting for type 2 diabetes mellitus, NSTEACS risk stratification, application of platelet glycoprotein (GP) IIB/IIIA receptor antagonists, type of contrast agent, number of balloon dilatations, number of stents, and thrombus burden (OR: 1.0113; 95% CI: 1.0036-1.0191; p = 0.004). Further, the risk of slow/no-reflow increased significantly with the contrast agent level up to the inflection point of 160 ml. CONCLUSION The contrast agent dose may be a risk factor for slow/no-reflow phenomenon after PTCA + stent in patients with NSTEACS. When the dose was greater than 160 ml, the risk of slow/no-reflow increased significantly.
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Murakami T, Takeda A. Aortic Reservoir Function has a Strong Impact on the Cardiac Blood Supply-Workload Balance in Children. Pediatr Cardiol 2018; 39:660-664. [PMID: 29288317 DOI: 10.1007/s00246-017-1803-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2017] [Accepted: 12/22/2017] [Indexed: 11/30/2022]
Abstract
It has been reported that more than half of the ejected blood from the left ventricle is stored in the aorta during systole and expelled during diastole. One important organ that receives blood flow mainly during diastole is the heart. It is also reported that the cardiac blood supply-workload balance in small children is disadvantageous to the heart. Therefore, we measured the aortic reservoir function and examined the relationship between the aortic reservoir function and the cardiac blood supply-workload balance. The percent diastolic runoff, which is the percentage of the diastolic blood flow of the total cardiac output, was measured as the index of the aortic reservoir function. The subendocardial viability ratio-the ratio of the diastolic pressure time index (the blood supply to the heart) to the tension time index (implying the myocardial oxygen demand)-was investigated as an index of the cardiac blood supply-workload balance in children. The percent diastolic runoff was 51.7 ± 4.5%, smaller than that in adult. It had a significant positive relationship to age (r2 = 0.32, p = 0.0052). The subendocardial viability ratio was 100.8 ± 19.6% and had a strong relationship to the percent diastolic runoff (r2 = 0.92, p < 0.0001). The percent diastolic runoff had a positive relationship with age during childhood. The value had a strong impact on the cardiac blood supply-workload balance.
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Affiliation(s)
- Tomoaki Murakami
- Department of Cardiology, Chiba Children's Hospital, 579-1 Heta-cho, Midori-ku, Chiba, 266-0007, Japan.
| | - Atsuhito Takeda
- Department of Pediatrics, Graduate School of Medicine, Hokkaido University, Sapporo, Japan
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De Rosa S, Eposito F, Carella C, Strangio A, Ammirati G, Sabatino J, Abbate FG, Iaconetti C, Liguori V, Pergola V, Polimeni A, Coletta S, Gareri C, Trimarco B, Stabile G, Curcio A, Indolfi C, Rapacciuolo A. Transcoronary concentration gradients of circulating microRNAs in heart failure. Eur J Heart Fail 2018; 20:1000-1010. [PMID: 29314582 DOI: 10.1002/ejhf.1119] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 11/12/2017] [Accepted: 11/16/2017] [Indexed: 01/16/2023] Open
Abstract
AIMS Circulating levels of microRNAs (miRNAs) are emergent promising biomarkers for cardiovascular disease. Altered expression of miRNAs has been related to heart failure (HF) and cardiac remodelling. We measured the concentration gradients across the coronary circulation to assess their usefulness to diagnose HF of different aetiologies. METHODS AND RESULTS Circulating miRNAs were measured in plasma samples simultaneously obtained from the aorta and the coronary venous sinus in patients with non-ischaemic HF (NICM-HF, n = 23) ischaemic HF (ICM-HF, n = 41), and in control patients (n = 11). A differential modulation of circulating levels of miR-423, -34a, -21-3p, -126, -199 and -30a was found across the aetiology groups. Interestingly, a positive transcoronary gradient was found for miR-423 (P < 0.001) and miR-34a (P < 0.001) only in the ICM-HF group. On the contrary, a positive gradient was found for miR-21-3p (P < 0.001) and miR-30a (P = 0.030) only in the NICM-HF group. Finally, no significant variations were observed in the transcoronary gradient of miR-126 or miR-199. CONCLUSIONS The present findings suggest that circulating levels of miRNAs are differentially expressed in patients with HF of different aetiologies. The presence of a transcoronary concentration gradient suggests a selective release of miRNAs by the failing heart into the coronary circulation. The presence of aetiology-specific transcoronary concentration gradients in HF patients might provide important information to better understand their role in HF, and suggests they could be useful biomarkers to distinguish HF of different aetiologies.
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Affiliation(s)
- Salvatore De Rosa
- Division of Cardiology, Department of Medical and Surgical Sciences, Magna Graecia University, Catanzaro, Italy
| | - Francesca Eposito
- Division of Cardiology, Department of Advanced Biomedical Sciences, Federico II University, Naples, Italy
| | - Cristina Carella
- Division of Cardiology, Department of Advanced Biomedical Sciences, Federico II University, Naples, Italy
| | - Antonio Strangio
- Division of Cardiology, Department of Medical and Surgical Sciences, Magna Graecia University, Catanzaro, Italy
| | - Giuseppe Ammirati
- Division of Cardiology, Department of Advanced Biomedical Sciences, Federico II University, Naples, Italy
| | - Jolanda Sabatino
- Division of Cardiology, Department of Medical and Surgical Sciences, Magna Graecia University, Catanzaro, Italy
| | - Fabio Giovanni Abbate
- Division of Cardiology, Department of Advanced Biomedical Sciences, Federico II University, Naples, Italy
| | - Claudio Iaconetti
- Division of Cardiology, Department of Medical and Surgical Sciences, Magna Graecia University, Catanzaro, Italy
| | - Vincenzo Liguori
- Division of Cardiology, Department of Advanced Biomedical Sciences, Federico II University, Naples, Italy
| | - Valerio Pergola
- Division of Cardiology, Department of Advanced Biomedical Sciences, Federico II University, Naples, Italy
| | - Alberto Polimeni
- Division of Cardiology, Department of Medical and Surgical Sciences, Magna Graecia University, Catanzaro, Italy
| | - Silvio Coletta
- Division of Cardiology, Department of Advanced Biomedical Sciences, Federico II University, Naples, Italy
| | - Clarice Gareri
- Division of Cardiology, Department of Medical and Surgical Sciences, Magna Graecia University, Catanzaro, Italy
| | - Bruno Trimarco
- Division of Cardiology, Department of Advanced Biomedical Sciences, Federico II University, Naples, Italy
| | | | - Antonio Curcio
- Division of Cardiology, Department of Medical and Surgical Sciences, Magna Graecia University, Catanzaro, Italy
| | - Ciro Indolfi
- Division of Cardiology, Department of Medical and Surgical Sciences, Magna Graecia University, Catanzaro, Italy.,URT-CNR of IFC, Magna Graecia University, Catanzaro, Italy
| | - Antonio Rapacciuolo
- Division of Cardiology, Department of Advanced Biomedical Sciences, Federico II University, Naples, Italy
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Abstract
Unraveling the mechanisms underlying Takotsubo (TTS) leads to question the current inclusion of the condition within the spectrum of cardiomyopathies. Indeed, the clinical presentation and pathophysiology of TTS clearly differ from cardiomyopathies, i.e. diseases of heart muscle unexplained by abnormal loading conditions or coronary artery disease, which cannot recover spontaneously and may cause sudden death often in minimally symptomatic individuals or result in a gradual deterioration in ventricular function and end-stage heart failure. Furthermore, the term 'cardiomyopathy' can no longer be applied when functional or morphologic abnormalities of the coronary arteries leading to acute myocardial ischemia are deemed responsible for left ventricular (LV) systolic dysfunction. After 27years of investigation, time has come to recognize that patients with TTS do suffer from severe myocardial ischemia and fulfill all criteria of acute coronary syndromes, i.e. acute chest pain, typical electrocardiographic changes, cardiac troponin rise, as well as LV wall motion abnormalities. Accordingly, we propose that TTS should be labeled as an acute 'syndrome' to be included more appropriately within the spectrum of ischemic heart disease. With regard to the term 'stress', it may imply that the catecholamine surge is essential to produce the typical transient myocardial injury. Thus, the terminology 'Takotsubo (stress) syndrome' would more accurately reflect recent advances in the pathophysiology.
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Affiliation(s)
| | - Gianfranco Sinagra
- Cardiovascular Department, Azienda Sanitaria-Universitaria Integrata of Trieste 'ASUITS', Trieste, Italy
| | - Perry Elliott
- Institute of Cardiovascular Science, University College London and St. Bartholomew's Hospital, London, United Kingdom
| | - Guido Parodi
- Clinical and Interventional Cardiology, Sassari University Hospital, Sassari, Italy
| | - Cristina Basso
- Department of Cardiac, Thoracic and Vascular Sciences, University of Padua Medical School, Padua, Italy
| | - Paolo G Camici
- Vita-Salute University and San Raffaele Hospital, Milan, Italy.
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Avci E, Yildirim T, Kadi H. Contrast-Induced Nephropathy Is Less Common in Patients with Good Coronary Collateral Circulation. Cardiorenal Med 2017; 7:316-323. [PMID: 29118770 DOI: 10.1159/000479013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 06/19/2017] [Indexed: 12/18/2022] Open
Abstract
Background/Aims Contrast-induced nephropathy (CIN) is a typically reversible type of acute renal failure that develops after exposure to contrast agents; underlying endothelial dysfunction is thought to be an important risk factor for CIN. Although the mechanism of coronary collateral circulation (CCC) is not fully understood, a pivotal role of the endothelium has been reported in many studies. The aim of this study was to investigate whether there is a relationship between CCC and CIN. Methods Patients with at least one occluded major coronary artery and blood creatinine analyses performed before and on the second day after angiography were included in the study. CIN was defined as a 25% or greater elevation of creatinine on the second day after exposure to the contrast agent. Collateral grading was performed according to the Rentrop classification. Patients were grouped according to whether they developed CIN or not, i.e., CIN(-) and CIN(+) group. Results A total of 214 patients who met the inclusion criteria were included in the study. CIN was diagnosed in 43 patients (20.1%) in the study population. Good CCC was identified in 112 patients (65.5%) in the CIN(-) group, whereas it was identified in 13 patients (30.2%) in the CIN(+) group. In the CIN(-) group, good CCC was significantly more frequent (p < 0.001). Furthermore, collateral circulation was an independent predictor of CIN. Conclusion Good collateral circulation was associated with a lower frequency of CIN, and poor collateral circulation was an independent predictor of CIN.
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Affiliation(s)
- Eyup Avci
- Cardiology Department, Balikesir University Faculty of Medicine, Balikesir, Turkey
| | - Tarik Yildirim
- Cardiology Clinic, Balikesir State Hospital, Balikesir, Turkey
| | - Hasan Kadi
- Cardiology Department, Balikesir University Faculty of Medicine, Balikesir, Turkey
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45
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Al-Biltagi M, ElHafez MAA, El Amrousy DM, El-Gamasy M, El-Serogy H. Evaluation of the coronary circulation and calcification in children on regular hemodialysis. Pediatr Nephrol 2017; 32:1941-1951. [PMID: 28497191 DOI: 10.1007/s00467-017-3678-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Revised: 04/04/2017] [Accepted: 04/07/2017] [Indexed: 02/07/2023]
Abstract
BACKGROUND The objective of this study was to evaluate the coronary circulation and calcification in children with end-stage renal disease (ESRD) on hemodialysis. METHODS A total of 50 children with ESRD and 50 healthy controls were enrolled in the study. Cardiac functions and coronary blood flow were evaluated with conventional and tissue Doppler echocardiography. Coronary artery calcification (CAC) was evaluated using high-resolution multidetector computed tomography (CT). RESULTS The hyperemic coronary flow volume (CFV) and coronary flow reserve were significantly lower in the patient group than in the controls, while there was no significant difference in the baseline CFV between the two groups. Hypertension was present in 60% and CAC was observed in 20% of the children in the patient group. CAC was present in 30% of the children in the hypertensive subgroup. The left ventricle myocardial performance index (LV MPI), CAC score, duration of hypertension and level of diastolic blood pressure were independent predictors of the coronary blood flow, and LV MPI, serum parathyroid hormone, duration of dialysis and E'/A' mitral valve were independent predictors of coronary calcification. CONCLUSION High diastolic blood pressure, long duration of hypertension, high LV MPI and increased CAC scores are independent risk factors for impaired coronary blood flow in children with ESRD.
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Affiliation(s)
- Mohammed Al-Biltagi
- Pediatric Department, Faculty of Medicine, Tanta University, Tanta, Al Gharbia, Egypt.
- Faculty of Medicine, Arabian Gulf University, Manama, Kingdom of Bahrain.
| | | | | | - Mohamed El-Gamasy
- Pediatric Department, Faculty of Medicine, Tanta University, Tanta, Al Gharbia, Egypt
| | - Hesham El-Serogy
- Clinical Pathology Department, Faculty of Medicine, Tanta University, Tanta, Al Gharbia, Egypt
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46
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Okamoto E, Yano T, Miura H, Shiraishi Y, Yambe T, Mitamura Y. Measurement of hemodynamic changes with the axial flow blood pump installed in descending aorta. J Artif Organs 2017; 20:390-393. [PMID: 28887718 DOI: 10.1007/s10047-017-0985-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Accepted: 08/01/2017] [Indexed: 11/26/2022]
Abstract
We have developed various axial flow blood pumps to realize the concept of the Valvo pump, and we have studied hemodynamic changes under cardiac assistance using an axial flow blood pump in series with the natural heart. In this study, we measured hemodynamic changes of not only systemic circulation but also cerebral circulation and coronary circulation under cardiac support using our latest axial flow blood pump placed in the descending aorta in an acute animal experiment. The axial flow blood pump was installed at the thoracic descending aorta through a left thoracotomy of a goat (43.8 kg, female). When the pump was on, the aortic pressure and aortic flow downstream of the pump increased with preservation of pulsatilities. The pressure drop upstream of the pump caused reduction of afterload pressure, and it may lead to reduction of left ventricular wall stress. However, cerebral blood flow and coronary blood flow were decreased when the pump was on. The axial flow blood pump enables more effective blood perfusion into systemic circulation, but it has the potential risk of blood perfusion disturbance into cerebral circulation and coronary circulation. The results indicate that the position before the coronary ostia might be suitable for implantation of the axial flow blood pump in series with the natural heart to avoid blood perfusion disturbances.
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Affiliation(s)
- Eiji Okamoto
- Graduate School of Science and Engineering, Tokai University, Minami-sawa 5-1-1-1, Minami-ku, Sapporo, 005-8601, Japan.
| | - Tetsuya Yano
- Graduate School of Science and Engineering, Hirosaki University, Hirosaki, Japan
| | - Hidekazu Miura
- Faculty of Medical Engineering, Suzuka University of Medical Science, Suzuka, Japan
| | - Yasuyuki Shiraishi
- Institute of Development Aging and Cancer, Tohoku University, Sendai, Japan
| | - Tomoyuki Yambe
- Institute of Development Aging and Cancer, Tohoku University, Sendai, Japan
| | - Yoshinori Mitamura
- Graduate School of Science and Engineering, Tokai University, Minami-sawa 5-1-1-1, Minami-ku, Sapporo, 005-8601, Japan
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47
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Aksoy F, Baş HA, Altınbaş A. Nonsymptomatic myocardial bridge causing systolic total narrowing of circumflex artery. J Saudi Heart Assoc 2017; 30:153-156. [PMID: 29910588 PMCID: PMC6000891 DOI: 10.1016/j.jsha.2017.06.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2017] [Revised: 06/13/2017] [Accepted: 06/13/2017] [Indexed: 12/20/2022] Open
Abstract
Myocardial bridge is defined as the narrowing of any coronary artery segment in systole but a normal diameter in diastole. It is most frequently seen on left anterior descending (LAD) artery. Left circumflex artery (LCx) is very rare. A 62 year-old male patient presented with severe, squeezing chest pain. The electrocardiogram showed T wave inversion in V1–V4 and ST depression in DII, DIII, aVF. Coronary angiography showed complicated lesion on after S2 branches of LAD and myocardial bridge causing 100% systolic narrowing of fourth obtus marginal branch of LCx. Bare metal stent was placed to LAD lesions with no residual occlusion. The patient was discharged with beta-blocker therapy. He had no recurrent chest pain during six months of follow-up.
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Affiliation(s)
- Fatih Aksoy
- Department of Cardiology, Dinar State Hospital, Dinar, Afyon, TurkeyaTurkey
| | - Hasan Aydın Baş
- Department of Cardiology, Isparta State Hospital, Isparta, TurkeybTurkey
| | - Ahmet Altınbaş
- Department of Cardiology, Faculty of Medicine, Suleyman Demirel University, Isparta, TurkeycTurkey
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48
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Soucy KG, Bartoli CR, Phillips D, Giridharan GA, Sobieski MA, Wead WB, Dowling RD, Wu ZJ, Prabhu SD, Slaughter MS, Koenig SC. Continuous-Flow Left Ventricular Assist Device Support Improves Myocardial Supply:Demand in Chronic Heart Failure. Ann Biomed Eng 2017; 45:1475-1486. [PMID: 28168379 DOI: 10.1007/s10439-017-1804-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 01/27/2017] [Indexed: 10/20/2022]
Abstract
Continuous-flow left ventricular assist devices (CF LVADs) are rotary blood pumps that improve mean blood flow, but with potential limitations of non-physiological ventricular volume unloading and diminished vascular pulsatility. In this study, we tested the hypothesis that left ventricular unloading with increasing CF LVAD flow increases myocardial flow normalized to left ventricular work. Healthy (n = 8) and chronic ischemic heart failure (IHF, n = 7) calves were implanted with CF LVADs. Acute hemodynamics and regional myocardial blood flow were measured during baseline (LVAD off, clamped), partial (2-4 L/min) and full (>4 L/min) LVAD support. IHF calves demonstrated greater reduction of cardiac energy demand with increasing LVAD support compared to healthy calves, as calculated by rate-pressure product. Coronary artery flows (p < 0.05) and myocardial blood flow (left ventricle (LV) epicardium and myocardium, p < 0.05) decreased with increasing LVAD support in normal calves. In the IHF model, blood flow to the septum, LV, LV epicardium, and LV myocardium increased significantly with increasing LVAD support when normalized to cardiac energy demand (p < 0.05). In conclusion, myocardial blood flow relative to cardiac demand significantly increased in IHF calves, thereby demonstrating that CF LVAD unloading effectively improves cardiac supply and demand ratio in the setting of ischemic heart failure.
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Affiliation(s)
- Kevin G Soucy
- Department of Cardiovascular and Thoracic Surgery, Cardiovascular Innovation Institute, University of Louisville, Louisville, KY, 40202, USA.,Department of Bioengineering, University of Louisville, Louisville, KY, 40202, USA
| | - Carlo R Bartoli
- Division of Cardiovascular Surgery, Department of Surgery, Hospital of the University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Dustin Phillips
- Department of Bioengineering, University of Louisville, Louisville, KY, 40202, USA
| | | | - Michael A Sobieski
- Department of Cardiovascular and Thoracic Surgery, Cardiovascular Innovation Institute, University of Louisville, Louisville, KY, 40202, USA
| | - William B Wead
- Department of Physiology and Biophysics, School of Medicine, University of Louisville, Louisville, KY, 40202, USA
| | | | - Zhongjun J Wu
- Department of Cardiovascular and Thoracic Surgery, Cardiovascular Innovation Institute, University of Louisville, Louisville, KY, 40202, USA
| | - Sumanth D Prabhu
- Division of Cardiovascular Disease and Comprehensive Cardiovascular Center, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
| | - Mark S Slaughter
- Department of Cardiovascular and Thoracic Surgery, Cardiovascular Innovation Institute, University of Louisville, Louisville, KY, 40202, USA.,Department of Bioengineering, University of Louisville, Louisville, KY, 40202, USA
| | - Steven C Koenig
- Department of Cardiovascular and Thoracic Surgery, Cardiovascular Innovation Institute, University of Louisville, Louisville, KY, 40202, USA. .,Department of Bioengineering, University of Louisville, Louisville, KY, 40202, USA.
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49
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Nakayama M, Chikamori T, Uchiyama T, Kimura Y, Hijikata N, Ito R, Yuhara M, Sato H, Kobori Y, Yamashina A. Effects of caffeine on fractional flow reserve values measured using intravenous adenosine triphosphate. Cardiovasc Interv Ther 2017; 33:116-124. [PMID: 28110424 DOI: 10.1007/s12928-017-0456-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 01/04/2017] [Indexed: 01/09/2023]
Abstract
We investigated the effects of caffeine intake on fractional flow reserve (FFR) values measured using intravenous adenosine triphosphate (ATP) before cardiac catheterization. Caffeine is a competitive antagonist for adenosine receptors; however, it is unclear whether this antagonism affects FFR values. Patients were evenly randomized into 2 groups preceding the FFR study. In the caffeine group (n = 15), participants were given coffee containing 222 mg of caffeine 2 h before the catheterization. In the non-caffeine group (n = 15), participants were instructed not to take any caffeine-containing drinks or foods for at least 12 h before the catheterization. FFR was performed in patients with more than intermediate coronary stenosis using the intravenous infusion of ATP at 140 μg/kg/min (normal dose) and 170 μg/kg/min (high dose), and the intracoronary infusion of papaverine. FFR was followed for 30 s after maximal hyperemia. In the non-caffeine group, the FFR values measured with ATP infusion were not significantly different from those measured with papaverine infusion. However, in the caffeine group, the FFR values were significantly higher after ATP infusion than after papaverine infusion (P = 0.002 and P = 0.007, at normal and high dose ATP vs. papaverine, respectively). FFR values with ATP infusion were significantly increased 30 s after maximal hyperemia (P = 0.001 and P < 0.001 for normal and high dose ATP, respectively). The stability of the FFR values using papaverine showed no significant difference between the 2 groups. Caffeine intake before the FFR study affected FFR values and their stability. These effects could not be reversed by an increased ATP dose.
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Affiliation(s)
- Masafumi Nakayama
- Cardiovascular Center, Toda Central General Hospital, 1-19-3 Hon-cho, Toda, Saitama, 335-0023, Japan.
| | | | - Takashi Uchiyama
- Cardiovascular Center, Toda Central General Hospital, 1-19-3 Hon-cho, Toda, Saitama, 335-0023, Japan
| | - Yo Kimura
- Cardiovascular Center, Toda Central General Hospital, 1-19-3 Hon-cho, Toda, Saitama, 335-0023, Japan
| | - Nobuhiro Hijikata
- Cardiovascular Center, Toda Central General Hospital, 1-19-3 Hon-cho, Toda, Saitama, 335-0023, Japan
| | - Ryosuke Ito
- Cardiovascular Center, Toda Central General Hospital, 1-19-3 Hon-cho, Toda, Saitama, 335-0023, Japan
| | - Mikio Yuhara
- Cardiovascular Center, Toda Central General Hospital, 1-19-3 Hon-cho, Toda, Saitama, 335-0023, Japan
| | - Hideaki Sato
- Cardiovascular Center, Toda Central General Hospital, 1-19-3 Hon-cho, Toda, Saitama, 335-0023, Japan
| | - Yuichi Kobori
- Cardiovascular Center, Toda Central General Hospital, 1-19-3 Hon-cho, Toda, Saitama, 335-0023, Japan
| | - Akira Yamashina
- Department of Cardiology, Tokyo Medical University, Tokyo, Japan
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50
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Guala A, Leone D, Milan A, Ridolfi L. In silico analysis of the anti-hypertensive drugs impact on myocardial oxygen balance. Biomech Model Mechanobiol 2017; 16:1035-1047. [PMID: 28070737 DOI: 10.1007/s10237-017-0871-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 01/02/2017] [Indexed: 01/09/2023]
Abstract
Hypertension is a very common pathology, and its clinical treatment largely relies on different drugs. Some of these drugs exhibit specific protective functions in addition to those resulting from blood pressure reduction. In this work, we study the impact of commonly used anti-hypertensive drugs (RAAS, [Formula: see text] and calcium channel blockers) on myocardial oxygen supply-consumption balance, which plays a crucial role in type 2 myocardial infarction. To this aim, 42 wash-out hypertensive patients were selected, a number of measured data were used to set a validated multi-scale cardiovascular model to subject-specific conditions, and the administration of different drugs was suitably simulated. Our results ascribe the well-known major cardioprotective efficiency of [Formula: see text] blockers compared to other drugs to a positive change of myocardial oxygen balance due to the concomitant: (1) reduction in aortic systolic, diastolic and pulse pressures, (2) decrease in left ventricular work, diastolic cavity pressure and oxygen consumption, (3) increase in coronary flow and (4) ejection efficiency improvement. RAAS blockers share several positive outcomes with [Formula: see text] blockers, although to a reduced extent. In contrast, calcium channel blockers seem to induce some potentially negative effects on the myocardial oxygen balance.
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Affiliation(s)
- A Guala
- DIATI, Politecnico di Torino, Turin, Italy.
- Vall D'Hebron Institute of Research (VHIR), Universitat Autònoma de Barcelona, Barcelona, Spain.
| | - D Leone
- Department of Medical Sciences, Hypertension Unit, University of Torino, Turin, Italy
| | - A Milan
- Department of Medical Sciences, Hypertension Unit, University of Torino, Turin, Italy
| | - L Ridolfi
- DIATI, Politecnico di Torino, Turin, Italy
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