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Katsuda SI, Horikoshi Y, Shiomi M, Kitajima S, Ito T, Hazama A, Shimizu T, Shirai K. Arterial stiffness of the aorta and iliofemoral artery and their responses to nitroglycerin administration in myocardial infarction-prone Watanabe heritable hyperlipidemic rabbits. J Hypertens 2024; 42:441-449. [PMID: 37937516 PMCID: PMC10842652 DOI: 10.1097/hjh.0000000000003608] [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: 03/21/2023] [Revised: 10/14/2023] [Accepted: 10/19/2023] [Indexed: 11/09/2023]
Abstract
OBJECTIVES The role of hypercholesterolemia in arterial stiffness, which usually reflects the progression of atherosclerosis has not been fully investigated. To clarify the meaning of arterial stiffness in hypercholesterolemia, we evaluated arterial stiffness in myocardial infarction-prone Watanabe heritable hyperlipidemic (WHHLMI) rabbits by using new arterial stiffness indices of the aorta and common iliac to femoral artery. The new arterial stiffness indices of both arteries were determined by the application of the theory of cardio-ankle vascular index (CAVI) to the aorta (aBeta) and ilio-femoral artery (ifBeta). Furthermore, the responses of both indices to nitroglycerin (NTG) administration were compared between WHHHMI and normal rabbits. DESIGN AND METHODS aBeta and ifBeta of WHHLMI and normal rabbits were measured under anesthesia. Pulse wave velocity in the whole aorta (aPWV) and ilio-femoral artery (ifPWV), blood pressure, and other parameters were measured before and after administration of NTG (50-120 μg/kg/min) every 1 for 5 min. RESULTS Atherosclerotic lesions were observed in the aorta, but a little in the ilio-femoral artery in WHHLMI rabbits. Compared with normal rabbits, aBeta was significantly higher, but ifBeta was lower in WHHLMI rabbits. When NTG was administered, ifBeta decreased significantly in both groups; however, aBeta increased in normal rabbits, but remained unchanged in WHHIMI rabbits. CONCLUSION These findings suggested that hereditary hypercholesterolemia in rabbits did not uniformly enhance arterial stiffness in elastic artery and muscular artery. The responses to NTG were also different between two arteries. The mechanism of these different responses needs further studies.
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Affiliation(s)
- Shin-ichiro Katsuda
- Department of Cellular and Integrative Physiology, Fukushima Medical University School of Medicine, 1 Hikari-ga-oka
| | - Yuko Horikoshi
- Division of Laboratory Medicine, Fukushima Medical University School of Health Sciences, Fukushima
| | - Masashi Shiomi
- Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe University Graduate School of Medicine, Kobe
- Division of Biological Resources and Development, Analytical Research Center for Experimental Sciences, Saga University, Saga
| | - Shuji Kitajima
- Division of Biological Resources and Development, Analytical Research Center for Experimental Sciences, Saga University, Saga
| | - Toshiro Ito
- Department of Cellular and Integrative Physiology, Fukushima Medical University School of Medicine, 1 Hikari-ga-oka
| | - Akihiro Hazama
- Department of Cellular and Integrative Physiology, Fukushima Medical University School of Medicine, 1 Hikari-ga-oka
| | - Tsuyoshi Shimizu
- Shimizu Institute of Space Physiology, Suwa Maternity Clinic, Nagano
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Obajed Al-Ali N, Tóth SR, Váróczy L, Pinczés LI, Soltész P, Szekanecz Z, Kerekes G. One Step Back from Bedside to the Bench-How Do Different Arterial Stiffness Parameters Behave in Relation to Peripheral Resistance? Diagnostics (Basel) 2023; 13:2897. [PMID: 37761264 PMCID: PMC10528548 DOI: 10.3390/diagnostics13182897] [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: 07/20/2023] [Revised: 08/30/2023] [Accepted: 09/06/2023] [Indexed: 09/29/2023] Open
Abstract
The investigation of arterial stiffening is a promising approach to estimating cardiovascular risk. Despite the widespread use of different methods, the dynamic nature of measured and calculated stiffness parameters is marginally investigated. We aimed to determine the stability of large artery elasticity parameters assessed via commonly used, ultrasound-based and oscillometric methods in relation to peripheral resistance modulation. A human experimental environment was composed, and fifteen young males were investigated at rest after extremity heating and external compression. Functional vascular parameters were monitored in each session, and several arterial stiffness parameters were analysed. The distensibility coefficient (DC) did not show significant changes during heat provocation and extremity compression, while DC's stability seemed to be acceptable. The same stability of carotid-femoral pulse wave velocity (PWV) was detected with ultrasound measurement (5.43 ± 0.79, 5.32 ± 0.86 and 5.28 ± 0.77, with p = 0.38, p = 0.27 and p = 0.76, respectively) with excellent intersession variability (intraclass correlation coefficient of 0.90, 0.88 and 0.91, respectively). However, the oscillometric PWV (oPWV) did change significantly between the heating and outer compression phase of the study (7.46 ± 1.37, 7.10 ± 1.18 and 7.60 ± 1.21, with p = 0.05, p = 0.68 and p < 0.001, respectively), the alteration of which is closely related to wave reflection, represented by the changes in reflection time. Our results indicate the good stability of directly measured elastic parameters such as DC and PWV, despite the extreme modulation of peripheral resistance. However, the oscillometric, indirectly detected PWV might be altered by physical interventions, which depend on wave reflection. The effective modulation of wave reflection was characterized by changes in the augmentation index, detected using both oscillometry and applanation tonometry. Thus, the environment during oscillometric measurement should be rigorously standardized. Furthermore, our results suggest the dynamic nature of the reflection point, rather than being a fixed anatomical point, proposed previously as aortic bifurcation.
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Affiliation(s)
- Nóra Obajed Al-Ali
- Division of Hematology, Department of Internal Medicine, Faculty of Medicine, University of Debrecen, 4032 Debrecen, Hungary; (L.V.); (L.I.P.)
| | - Sára Rebeka Tóth
- Department of Cardiology, Medical Centre, Hungarian Defence Forces, 1134 Budapest, Hungary;
| | - László Váróczy
- Division of Hematology, Department of Internal Medicine, Faculty of Medicine, University of Debrecen, 4032 Debrecen, Hungary; (L.V.); (L.I.P.)
| | - László Imre Pinczés
- Division of Hematology, Department of Internal Medicine, Faculty of Medicine, University of Debrecen, 4032 Debrecen, Hungary; (L.V.); (L.I.P.)
| | - Pál Soltész
- Division of Angiology, Department of Internal Medicine, Faculty of Medicine, University of Debrecen, 4032 Debrecen, Hungary;
| | - Zoltán Szekanecz
- Department of Rheumatology, Faculty of Medicine, University of Debrecen, 4032 Debrecen, Hungary;
| | - György Kerekes
- Division of Intensive Care, Department of Internal Medicine, Faculty of Medicine, University of Debrecen, 4032 Debrecen, Hungary;
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Takahashi M, Miyazaki C, Xin C, Sato S, Shimizu K, Chiba T, Tsukuma H, Komatsu T, Aimoto M, Nagasawa Y, Takahara A, Shirai K. The role of arterial stiffness in the onset of Takotsubo cardiomyopathy observed with noradrenaline administration and intracranial blood injection in rabbits. Heart Vessels 2023. [PMID: 36629930 DOI: 10.1007/s00380-022-02223-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 12/14/2022] [Indexed: 01/12/2023]
Abstract
Takotsubo cardiomyopathy (TCM) has been reported to occur after subarachnoid hemorrhage, and the involvement of a critical activity of catecholamines has been mentioned, but the details of its onset have not been fully clarified. Recently, proper arterial stiffness could be measured with cardio-ankle vascular index. Therefore, we aimed to clarify the role of arterial stiffness in onset of TCM using rabbits under infusion of noradrenaline and injection of blood into brain ventricle. Rabbits were divided into three groups: infusion of noradrenaline (group A), infusion of noradrenaline + injection of saline into the brain ventricle (group B), infusion of noradrenaline + injection of blood in the brain ventricle (group C). Aortic arterial stiffness beta (Aβ) and femoral arterial stiffness beta (Fβ) were defined according to definition of the cardio-ankle vascular index. Blood pressure (BP), Aβ, Fβ, and femoral vessel resistance (FVR) were measured. Left ventricular movement were monitored with echocardiography. BP increased uniformly in all three groups. Fβ in the group A, B and C increased from 3.6 ± 3.2, 3.6 ± 3.6 and 3.9_ ± 4.2 to 15 ± 2, 17.9 ± 2.4, 34.8 ± 9.1 due to the ICP enhancements in addition to noradrenaline administration, respectively. Fβ in groups B and C was significantly larger than that in group A. On echocardiography, a much higher akinesic area of the apex was observed in group C compared with group A and B. Cardiac movements similar to TCM were observed slightly in group B and definitely in group C. Noradrenaline administration infusion and blood injection into the brain ventricle induced TCM accompanying with enhanced femoral arterial stiffness. These results suggested that elevated arterial stiffness might be involved in the formation of TCM in addition to a critical activity of catecholamines and an increase in intracranial pressure with blood injection.
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Horikoshi Y, Katsuda SI, Fujikura Y, Hazama A, Shimura H, Shimizu T, Shirai K. Opposing Responses of the Calcium Channel Blocker Nicardipine to Vascular Stiffness in the Elastic and Muscular Arteries in Rabbits. J Atheroscler Thromb 2021; 28:1340-1348. [PMID: 33746145 PMCID: PMC8629710 DOI: 10.5551/jat.60848] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 01/25/2021] [Indexed: 11/21/2022] Open
Abstract
AIM The cardio-ankle vascular index (CAVI) consists of intrinsic and functional arterial stiffness mainly regulated by vasoactive compounds. A new stiffness index of the aorta (aBeta) and iliac-femoral arteries (ifBeta) was determined by applying the CAVI theory to the whole aorta and iliac-femoral arteries. We investigated the changes in aBeta and ifBeta in response to decreased blood pressure (BP) induced by the Ca2+ channel blocker nicardipine to elucidate the involvement of Ca2+ in aBeta and ifBeta. METHODS Pressure waves at the origin of the aorta (oA), distal end of the abdominal aorta (dA), and left femoral artery (fA) as well as flow waves at the oA were simultaneously recorded before and after the infusion of nicardipine (50 µg/kg/min) for 2 min in 12 male rabbits under pentobarbital anesthesia. Beta was calculated using the following formula: Beta=2ρ / PP×ln (SBP / DBP)×PWV2, where ρ, SBP, DBP, and PP denote blood density and systolic, diastolic, and pulse pressures, respectively. aBeta, ifBeta, and aortic-iliac-femoral Beta (aifBeta) were calculated using aPWV, ifPWV, and aifPWV, respectively. RESULTS SBP, mean arterial pressure (MAP), DBP, and total peripheral vascular resistance significantly decreased during the administration of nicardipine, whereas cardiac output significantly increased. aBeta and ifBeta significantly increased and decreased, respectively, whereas aifBeta did not change despite the decrease in BP. ifBeta and aBeta positively and negatively correlated with BP, respectively, whereas aifBeta did not correlate with SBP. CONCLUSIONS There were contradictory arterial responses to nicardipine between the elastic and muscular arteries. Unknown vasoconstriction mechanisms that are not involved in Ca2+ influx may function in the aorta in response to decreased BP.
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Affiliation(s)
- Yuko Horikoshi
- Department of Clinical Laboratory Sciences, School of Health Sciences, Fukushima Medical University, Fukushima, Japan
- Department of Laboratory Medicine, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Shin-ichiro Katsuda
- Department of Cellular and Integrative Physiology, Fukushima Medical University School of Medicine, Fukushima, Japan
| | | | - Akihiro Hazama
- Department of Cellular and Integrative Physiology, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Hiroki Shimura
- Department of Laboratory Medicine, Fukushima Medical University School of Medicine, Fukushima, Japan
| | - Tsuyoshi Shimizu
- Shimizu Institute of Space Physiology, Suwa Maternity Clinic, Nagano, Japan
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Sumin AN, Shcheglova AV. Assessment of Arterial Stiffness Using the Cardio-Ankle Vascular Index – What We Know and What We Strive for. Racionalʹnaâ farmakoterapiâ v kardiologii 2021. [DOI: 10.20996/1819-6446-2021-08-09] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Currently, the importance of assessing arterial stiffness as an integral indicator of cardiovascular risk, an indicator of arteriosclerosis, and a predictor of cardiovascular events has been demonstrated. The traditional indicator of arterial stiffness-pulse wave velocity-depends on the level of blood pressure, which makes it difficult to use it for dynamic assessment. The proposed new arterial stiffness index-the cardio-ankle vascular index (CAVI), does not depend on the level of blood pressure and is more convenient in practical use. CAVI has been widely used in clinical medicine for the past 15 years as an index for assessing cardiovascular diseases and risk factors, which has allowed for the expansion and deepening of research on this topic. This review focuses primarily on recent publications and new opportunities for evaluating vascular function using CAVI. The review provides information on solving methodological problems in evaluating CAVI, highlights the relationship between CAVI and future cardiovascular events, and provides cross-sectional data on the Association of CAVI with the presence of cardiovascular diseases and their risk factors. The results of studies on the effect of drug therapy and measures to control risk factors for cardiovascular diseases on CAVI are presented. While it remains unclear how much changes in CAVI over time can affect the forecast, research is currently being conducted in this direction. The use of CAVI also opens up new perspectives in the assessment of cardiovascular interactions, the study of vascular function in vasculitis and vascular injuries, as well as in geriatric medicine (concepts of premature vascular aging and excess vascular aging).
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Affiliation(s)
- A. N. Sumin
- Research Institute for Complex Issues of Cardiovascular Diseases
| | - A. V. Shcheglova
- Research Institute for Complex Issues of Cardiovascular Diseases
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Komatsu T, Shiba T, Watanabe K, Sakuma K, Aimoto M, Nagasawa Y, Takahara A, Hori Y. Real-Time Evaluation of Regional Arterial Stiffening, Resistance, and Ocular Circulation During Systemic Administration of Adrenaline in White Rabbits. Transl Vis Sci Technol 2021; 10:11. [PMID: 34357382 PMCID: PMC8354059 DOI: 10.1167/tvst.10.9.11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Purpose To evaluate continuous variations of ocular microcirculation by laser speckle flowgraphy and those of regional stiffening by pulse wave velocity (PWV) and vascular resistance under systemic adrenaline administration in rabbits. Methods Six 16-week-old male rabbits were evaluated. The mean blur rates in the retinal vessel (MBR-RV) and choroid (MBR-CH) were measured. We assessed blood pressure (BP), femoral and carotid vascular resistance, and the heart–ankle (ha)-PWV, heart–femoral (hf)-PWV, and femoral–ankle (fa)-PWV. Adrenaline (100, 300, and 1000 ng/kg) was intravenously administered over a 10-minute period during which the parameters were measured simultaneously every 2 minutes. Results The MBR-RV and MBR-CH values were dose-dependently increased by the adrenaline in parallel with increased BP. At the load of 100 ng/kg adrenaline, the ΔMBR-RV and ΔMBR-CH showed positive correlations with the variation rate in mean arterial blood pressure. Also, the variation rate in carotid vascular resistance and the Δfa-PWV and Δhf-PWV were significantly positively correlated with both the ΔMBR-RV and ΔMBR-CH. At the 300-ng/kg phase, the correlations between the Δha-PWV and both ΔMBR-RV and ΔMBR-CH were canceled; instead, the Δhf-PWV showed a significant negative correlation with the ΔMBR-RV and ΔMBR-CH. At the 1000-ng/kg phase, Δha-PWV again showed significant positive correlations with the ΔMBR-RV and ΔMBR-CH. Conclusions These results indicate the possibility that under a systemic administration of adrenaline in rabbits, not only the BP value but also the vascular resistance and arterial function are related to the variation in ocular microcirculation. Translational Relevance A real-time evaluation system of systemic regional arterial function and ocular microcirculation in rabbits was developed.
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Affiliation(s)
- Tetsuya Komatsu
- Department of Ophthalmology, Toho University Graduate School of Medicine, Tokyo, Japan
| | - Tomoaki Shiba
- Department of Ophthalmology, International University of Health and Welfare Narita Hospital, Narita, Japan
| | - Kento Watanabe
- Department of Ophthalmology, Toho University Graduate School of Medicine, Tokyo, Japan
| | - Kiyoshi Sakuma
- Department of Pharmacology and Therapeutics, Faculty of Pharmaceutical Sciences, Toho University, Chiba, Japan
| | - Megumi Aimoto
- Department of Pharmacology and Therapeutics, Faculty of Pharmaceutical Sciences, Toho University, Chiba, Japan
| | - Yoshinobu Nagasawa
- Department of Pharmacology and Therapeutics, Faculty of Pharmaceutical Sciences, Toho University, Chiba, Japan
| | - Akira Takahara
- Department of Pharmacology and Therapeutics, Faculty of Pharmaceutical Sciences, Toho University, Chiba, Japan
| | - Yuichi Hori
- Department of Pharmacology and Therapeutics, Faculty of Pharmaceutical Sciences, Toho University, Chiba, Japan
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Miyata M. Basic Research Sheds Light on the Aspect of Cardio-Ankle Vascular Index (CAVI) including Elastic and Muscular Arteries. J Atheroscler Thromb 2020; 28:588-589. [PMID: 33041314 PMCID: PMC8219537 DOI: 10.5551/jat.ed147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Affiliation(s)
- Masaaki Miyata
- School of Health Sciences, Faculty of Medicine, Kagoshima Universit
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