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Starecki F, Baillieul M, Ghanawi T, Hammouti A, Lemaitre J, Gutwirth J, Benardais A, Slang S, Charrier J, Bodiou L, Nemec P, Nazabal V. Praseodymium-Doped Ge 20In 5Sb 10Se 65 Films Based on Argon Plasma Cosputtering for Infrared-Luminescent Integrated Photonic Circuits. ACS Appl Mater Interfaces 2024; 16:5225-5233. [PMID: 38258799 DOI: 10.1021/acsami.3c14602] [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] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
In this paper, we report on the infrared luminescence of amorphous praseodymium-doped Ge20In5Sb10Se65 waveguides, which can be used as infrared sources in photonic integrated circuits on silicon substrates. Amorphous chalcogenide thin films were deposited by radiofrequency magnetron cosputtering using an argon plasma whose deposition parameters were optimized for chalcogenide materials. The micropatterning as ridge waveguides of the chalcogenide cosputtered films was performed using photolithography and plasma-coupled reactive ion etching techniques. The influence of the rare earth concentration within those thin films on their optical properties and rare earth spectroscopic properties was investigated. Using an excitation wavelength of 1.55 μm, the mid-infrared luminescence of Pr3+ ions from 2.5 to 5.5 μm was clearly demonstrated for studied chalcogenide materials. A wide range of waveguide widths and doping ratios were tested, assessing the ability of the cosputtering technique to preserve the luminescence properties of the rare earth ions initially observed in the bulk glass through the thin-film deposition and patterning process.
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Affiliation(s)
- Florent Starecki
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes)- UMR 6226, Université de Rennes, F-35000 Rennes, France
| | - Marion Baillieul
- Faculty of Chemical Technology, Department of Graphic Arts and Photophysics, University of Pardubice, Studentska 573, 53210 Pardubice, Czech Republic
| | - Taghrid Ghanawi
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes)- UMR 6226, Université de Rennes, F-35000 Rennes, France
| | - Abdelali Hammouti
- CNRS, Institut FOTON - UMR 6082, Université de Rennes, F-22305 Lannion, France
| | - Jonathan Lemaitre
- CNRS, Institut FOTON - UMR 6082, Université de Rennes, F-22305 Lannion, France
| | - Jan Gutwirth
- Faculty of Chemical Technology, Department of Graphic Arts and Photophysics, University of Pardubice, Studentska 573, 53210 Pardubice, Czech Republic
| | - Albane Benardais
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes)- UMR 6226, Université de Rennes, F-35000 Rennes, France
| | - Stanislav Slang
- CEMNAT, nám. Čs. legií 565, University of Pardubice, 53002 Pardubice, Czech Republic
| | - Joël Charrier
- CNRS, Institut FOTON - UMR 6082, Université de Rennes, F-22305 Lannion, France
| | - Loïc Bodiou
- CNRS, Institut FOTON - UMR 6082, Université de Rennes, F-22305 Lannion, France
| | - Petr Nemec
- Faculty of Chemical Technology, Department of Graphic Arts and Photophysics, University of Pardubice, Studentska 573, 53210 Pardubice, Czech Republic
| | - Virginie Nazabal
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes)- UMR 6226, Université de Rennes, F-35000 Rennes, France
- Faculty of Chemical Technology, Department of Graphic Arts and Photophysics, University of Pardubice, Studentska 573, 53210 Pardubice, Czech Republic
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Doll N, Weimar T, Kosior DA, Bulava A, Mokracek A, Mönnig G, Sahu J, Hunter S, Wijffels M, van Putte B, Rüb N, Nemec P, Ostrizek T, Suwalski P. Efficacy and safety of hybrid epicardial and endocardial ablation versus endocardial ablation in patients with persistent and longstanding persistent atrial fibrillation: a randomised, controlled trial. EClinicalMedicine 2023; 61:102052. [PMID: 37425372 PMCID: PMC10329123 DOI: 10.1016/j.eclinm.2023.102052] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 06/02/2023] [Accepted: 06/02/2023] [Indexed: 07/11/2023] Open
Abstract
Background Endocardial catheter ablation (CA) has limited long-term benefit for persistent and longstanding persistent atrial fibrillation (PersAF/LSPAF). We hypothesized hybrid epicardial-endocardial ablation (HA) would have superior effectiveness compared to CA, including repeat (rCA), in PersAF/LSPAF. Methods CEASE-AF (NCT02695277) is a prospective, multi-center, randomized controlled trial. Nine hospitals in Poland, Czech Republic, Germany, United Kingdom, and the Netherlands enrolled eligible participants with symptomatic, drug refractory PersAF and left atrial diameter (LAD) > 4.0 cm or LSPAF. Randomization was 2:1 to HA or CA by an independent statistician and stratified by site. Treatment assignments were masked to the core rhythm monitoring laboratory. For HA, pulmonary veins (PV) and left posterior atrial wall were isolated with thoracoscopic epicardial ablation including left atrial appendage exclusion. Endocardial touch-up ablation was performed 91-180 days post-index procedure. For CA, endocardial PV isolation and optional substrate ablation were performed. rCA was permitted between days 91-180. Primary effectiveness was freedom from AF/atrial flutter/atrial tachycardia >30-s through 12-months absent class I/III anti-arrhythmic drugs except those not exceeding previously failed doses. It was assessed in the modified intention-to-treat (mITT) population who had the index procedure and follow-up data. Major complications were assessed in the ITT population who had the index procedure. Thirty-six month follow-up continues. Findings Enrollment began November 20, 2015 and ended May 22, 2020. In 154 ITT patients (102 HA; 52 CA), 75% were male, mean age was 60.7 ± 7.9 years, mean LAD was 4.7 ± 0.4 cm, and 81% had PersAF. Primary effectiveness was 71.6% (68/95) in HA versus 39.2% (20/51) in CA (absolute benefit increase: 32.4% [95% CI 14.3%-48.0%], p < 0.001). Major complications through 30-days after index procedures plus 30-days after second stage/rCA were similar (HA: 7.8% [8/102] versus CA: 5.8% [3/52], p = 0.75). Interpretation HA had superior effectiveness compared to CA/rCA in PersAF/LSPAF without significant procedural risk increase. Funding AtriCure, Inc.
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Affiliation(s)
| | - Timo Weimar
- Eberhard Karls University School of Medicine, Tuebingen, Germany
| | - Dariusz A. Kosior
- Central Clinical Hospital of the Ministry of Interior and Administration, Warsaw, Poland
- Mossakowski Medical Research Institute, Polish Academy of Sciences, Warsaw, Poland
| | - Alan Bulava
- Ceske Budejovice Hospital, Ceske Budejovice, Czech Republic and Faculty of Health and Social Sciences, University of South Bohemia in Ceske Budejovice, Czech Republic
| | - Ales Mokracek
- Ceske Budejovice Hospital, Ceske Budejovice, Czech Republic and Faculty of Health and Social Sciences, University of South Bohemia in Ceske Budejovice, Czech Republic
| | | | | | | | | | | | - Norman Rüb
- RKH Klinikum Ludwigsburg, Ludwigsburg, Germany
| | - Petr Nemec
- Center of Cardiovascular Surgery and Transplantation, Brno, Czech Republic
| | - Tomas Ostrizek
- Center of Cardiovascular Surgery and Transplantation, Brno, Czech Republic
| | - Piotr Suwalski
- National Medical Institute of the Ministry of Interior and Administration, Centre of Postgraduate Medical Education, Warsaw, Poland
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Bulava A, Mokracek A, Wichterle D, Budera P, Osmancik P, Kacer P, Veteskova L, Nemec P, Skala T, Santavy P, Chovancik J, Branny P, Rizov V, Kolesar M, Rybar M. Sequential hybrid ablation versus surgical CryoMaze alone for treatment of atrial fibrillation (SurHyb Trial): a protocol of the multicentre randomized controlled trial. J Appl Biomed 2023. [PMID: 37212155 DOI: 10.32725/jab.2023.007] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/23/2023] Open
Abstract
BACKGROUND Atrial fibrillation is common in patients with structural heart disease who are undergoing cardiac surgery. Surgical CryoMaze has been shown to be an effective treatment in several trials, but success rates have varied considerably, between 47-95%. The sequential hybrid approach, combining surgical CryoMaze followed by radiofrequency catheter ablation, can achieve high freedom from atrial arrhythmias. However, in patients with concomitant surgical atrial fibrillation treatment, data comparing the hybrid approach to CryoMaze alone are lacking. METHODS The SurHyb study was designed as a prospective, open-label, multicentre randomized trial. Patients with non-paroxysmal atrial fibrillation who were scheduled for coronary artery bypass grafting or valve repair/replacement were randomized to either surgical CryoMaze alone or surgical CryoMaze followed by radiofrequency catheter ablation 3 months post-surgery. The primary outcome measure was arrhythmia-free survival without class I or III antiarrhythmic drugs, which has been evaluated using implantable cardiac monitors. CONCLUSIONS This is the first randomized study that compares concomitant surgical CryoMaze alone with the staged hybrid surgical CryoMaze followed by catheter ablation, in patients with non-paroxysmal atrial fibrillation using rigorous rhythm monitoring. The results may contribute to the optimization of the treatment in patients undergoing concomitant CryoMaze for atrial fibrillation.
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Affiliation(s)
- Alan Bulava
- University of South Bohemia in Ceske Budejovice, Faculty of Health and Social Sciences; Cardiac Centre, Ceske Budejovice Hospital, Ceske Budejovice, Czech Republic
| | - Ales Mokracek
- University of South Bohemia in Ceske Budejovice, Faculty of Health and Social Sciences; Cardiac Centre, Ceske Budejovice Hospital, Ceske Budejovice, Czech Republic
| | - Dan Wichterle
- Institute for Clinical and Experimental Medicine, Praha, Czech Republic
| | - Petr Budera
- Institute for Clinical and Experimental Medicine, Praha, Czech Republic
| | - Pavel Osmancik
- Charles University and University Hospital Kralovske Vinohrady, 3rd Faculty of Medicine, Praha, Czech Republic
| | - Petr Kacer
- Charles University and University Hospital Kralovske Vinohrady, 3rd Faculty of Medicine, Praha, Czech Republic
| | - Linda Veteskova
- Centre of Cardiovascular Surgery and Transplantation, Brno, Czech Republic
| | - Petr Nemec
- Centre of Cardiovascular Surgery and Transplantation, Brno, Czech Republic
| | - Tomas Skala
- Palacky University, Faculty of Medicine and Dentistry; University Hospital Olomouc, Olomouc, Czech Republic
| | - Petr Santavy
- Palacky University, Faculty of Medicine and Dentistry; University Hospital Olomouc, Olomouc, Czech Republic
| | - Jan Chovancik
- Hospital Agel Trinec-Podlesi, Trinec, Czech Republic
| | - Piotr Branny
- Hospital Agel Trinec-Podlesi, Trinec, Czech Republic
| | | | | | - Marian Rybar
- Czech Technical University in Prague, Faculty of Biomedical Engineering, Department of Biomedical Technology, Kladno, Czech Republic
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Gofus J, Fila P, Vobornik M, Ondrasek J, Nemec P, Sterba J, Cermakova E, Tuna M, Vojacek J. Unicuspid Aortic Valve in Patients Undergoing the Ross Procedure. Ann Thorac Surg 2023; 115:626-631. [PMID: 35430219 DOI: 10.1016/j.athoracsur.2022.03.061] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 02/28/2022] [Accepted: 03/22/2022] [Indexed: 11/01/2022]
Abstract
BACKGROUND The prevalence and outcomes of the unicuspid aortic valve (UAV) in patients undergoing the Ross procedure have been strongly underreported in the current literature. We sought to evaluate this in comparison with bicuspid (BAV) and tricuspid valve (TAV) in our Ross cohort. METHODS This was a retrospective observational study of patients undergoing the Ross procedure at 2 dedicated centers between 2009 and 2020. Primary end points were the risks of midterm autograft reoperation and the onset of at least moderate aortic regurgitation during follow-up. The secondary end point was to compare the perioperative outcomes between the groups. RESULTS Included in the analysis were 286 patients, of those 39% with UAV, 52% with BAV, and 9% with TAV. UAV patients were operated on at the youngest age (P < .001) and more often for a combined hemodynamic aortic valve pathology (P = .02). They had the largest aortic root dimensions: annulus (P = .01), Valsalva sinuses (P = .11), sinotubular junction (P = .001), and ascending aorta (P < .0001). The risks of reoperation (P = .86) and the onset of aortic regurgitation (P = .75) were comparable among the groups over the follow-up of 4.1 years. There was no difference in perioperative outcomes. CONCLUSIONS UAV is a separate unit characterized by a distinct hemodynamic pathology and generated aortopathy. It is not associated with a higher risk of reoperation or new onset of aortic regurgitation after the Ross procedure in the midterm postoperatively. At the current state, UAV remains acceptable for the Ross procedure.
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Affiliation(s)
- Jan Gofus
- Department of Cardiac Surgery, Charles University, Faculty of Medicine and University Hospital in Hradec Kralove, Hradec Kralove, Czech Republic
| | - Petr Fila
- Centre of Cardiovascular Surgery and Transplantation, Brno, Czech Republic; Department of Cardiovascular Surgery and Transplantation Brno, Faculty of Medicine, Masaryk University, Brno, Czech Republic.
| | - Martin Vobornik
- Department of Cardiac Surgery, Charles University, Faculty of Medicine and University Hospital in Hradec Kralove, Hradec Kralove, Czech Republic
| | - Jiri Ondrasek
- Centre of Cardiovascular Surgery and Transplantation, Brno, Czech Republic
| | - Petr Nemec
- Centre of Cardiovascular Surgery and Transplantation, Brno, Czech Republic; Department of Cardiovascular Surgery and Transplantation Brno, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Jan Sterba
- Centre of Cardiovascular Surgery and Transplantation, Brno, Czech Republic; Department of Cardiovascular Surgery and Transplantation Brno, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Eva Cermakova
- Department of Medical Biophysics, Charles University Faculty of Medicine, Hradec Kralove, Czech Republic
| | - Martin Tuna
- Department of Cardiac Surgery, Charles University, Faculty of Medicine and University Hospital in Hradec Kralove, Hradec Kralove, Czech Republic
| | - Jan Vojacek
- Department of Cardiac Surgery, Charles University, Faculty of Medicine and University Hospital in Hradec Kralove, Hradec Kralove, Czech Republic
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Bodiou L, Baillieul M, Nazabal V, Lemaitre J, Benardais A, Meziani S, Lorrain N, Dumeige Y, Nemec P, Charrier J. Carbon dioxide mid-infrared sensing based on Dy 3+-doped chalcogenide waveguide photoluminescence. Opt Lett 2023; 48:1128-1131. [PMID: 36857230 DOI: 10.1364/ol.483613] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 01/20/2023] [Indexed: 06/18/2023]
Abstract
Climate-active gases, notably carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O), display fundamental absorption bands in the mid-infrared (mid-IR). The detection and monitoring of those gases could be enabled by the development of mid-IR optical sources. Broadband mid-IR on-chip light emission from rare-earth-doped chalcogenide photonic integrated circuits could provide a compact, efficient, and cost-effective gas sensing solution. Mid-IR photoluminescence of dysprosium-doped selenide ridge waveguides obtained under optical pumping at a telecommunication wavelength (∼1.3 µm) is investigated for Dy3+ ion concentrations in the 2500-10,000 ppmw range. CO2 detection at around 4.3 µm is then demonstrated based on absorption of this broadband mid-IR emission.
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Bakosova M, Krejci J, Godava J, Ozabalova E, Poloczkova H, Honek T, Hude P, Machal J, Bedanova H, Nemec P, Spinarova L. Iron Deficiency in Patients with Advanced Heart Failure. Medicina (Kaunas) 2022; 58:1569. [PMID: 36363528 PMCID: PMC9697608 DOI: 10.3390/medicina58111569] [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] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Revised: 10/25/2022] [Accepted: 10/26/2022] [Indexed: 11/06/2022]
Abstract
Background and Objectives: Iron deficiency (ID) is a common comorbidity in patients with heart failure. It is associated with reduced physical performance, frequent hospitalisations for heart failure decompensation, and high cardiovascular and overall mortality. The aim was to determine the prevalence of ID in patients with advanced heart failure on the waiting list for heart transplantation. Methods and Materials: We included 52 patients placed on the waiting list for heart transplantation in 2021 at our centre. The cohort included seven patients with LVAD (left ventricle assist device) as a bridge to transplantation implanted before the time of results collection. In addition to standard tests, the parameters of iron metabolism were monitored. ID was defined as a ferritin value <100 µg/L, or 100−299 µg/L if transferrin saturation (T-sat) is <20%. Results: ID was present in 79% of all subjects, but only in 35% of these patients anaemia was expressed. In the group without LVAD, ID was present in 82%, a median (lower−upper quartile) of ferritin level was 95.4 (62.2−152.1) µg/mL and mean T-sat was 0.18 ± 0.09. In LVAD group, ID was present in 57%, ferritin level was 268 (106−368) µg/mL and mean T-sat was 0.14 ± 0.04. Haemoglobin concentration was the same in patients with or without ID (133 ± 16) vs. (133 ± 23). ID was not associated with anaemia defined with regard to patient’s gender. In 40.5% of cases, iron deficiency was accompanied by chronic renal insufficiency, compared to 12.5% of the patients without ID. In the patients with LVAD, ID was present in four out of seven patients, but the group was too small for reliable statistical testing due to low statistical power. Conclusions: ID was present in the majority of patients with advanced heart failure and was not always accompanied by anaemia and renal insufficiency. Research on optimal markers for the diagnosis of iron deficiency, especially for specific groups of patients with heart failure, is still ongoing.
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Affiliation(s)
- Maria Bakosova
- 1st Department of Internal Medicine-Cardioangiology, St. Anne's University Hospital, 60200 Brno, Czech Republic
- Faculty of Medicine, Masaryk University, 60200 Brno, Czech Republic
| | - Jan Krejci
- 1st Department of Internal Medicine-Cardioangiology, St. Anne's University Hospital, 60200 Brno, Czech Republic
- Faculty of Medicine, Masaryk University, 60200 Brno, Czech Republic
| | - Julius Godava
- 1st Department of Internal Medicine-Cardioangiology, St. Anne's University Hospital, 60200 Brno, Czech Republic
| | - Eva Ozabalova
- 1st Department of Internal Medicine-Cardioangiology, St. Anne's University Hospital, 60200 Brno, Czech Republic
| | - Hana Poloczkova
- 1st Department of Internal Medicine-Cardioangiology, St. Anne's University Hospital, 60200 Brno, Czech Republic
- Faculty of Medicine, Masaryk University, 60200 Brno, Czech Republic
| | - Tomas Honek
- 1st Department of Internal Medicine-Cardioangiology, St. Anne's University Hospital, 60200 Brno, Czech Republic
| | - Peter Hude
- 1st Department of Internal Medicine-Cardioangiology, St. Anne's University Hospital, 60200 Brno, Czech Republic
| | - Jan Machal
- 1st Department of Internal Medicine-Cardioangiology, St. Anne's University Hospital, 60200 Brno, Czech Republic
- Faculty of Medicine, Masaryk University, 60200 Brno, Czech Republic
- International Clinical Research Center, St Anne's University Hospital, 60200 Brno, Czech Republic
| | - Helena Bedanova
- Center for Cardiovascular and Transplant Surgery, 65691 Brno, Czech Republic
| | - Petr Nemec
- Faculty of Medicine, Masaryk University, 60200 Brno, Czech Republic
- Center for Cardiovascular and Transplant Surgery, 65691 Brno, Czech Republic
| | - Lenka Spinarova
- 1st Department of Internal Medicine-Cardioangiology, St. Anne's University Hospital, 60200 Brno, Czech Republic
- Faculty of Medicine, Masaryk University, 60200 Brno, Czech Republic
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Fila P, Gofus J, Nemec P, Vojacek J. Reply to Chen et al. Eur J Cardiothorac Surg 2022; 62:6572341. [PMID: 35451468 DOI: 10.1093/ejcts/ezac260] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 04/13/2022] [Indexed: 01/07/2023] Open
Affiliation(s)
- Petr Fila
- Centre of Cardiovascular Surgery and Transplantation, Brno, Czech Republic.,Department of Cardiovascular Surgery and Transplantation, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Jan Gofus
- Department of Cardiac Surgery, Charles University, Faculty of Medicine, University Hospital in Hradec Kralove, Hradec Kralove, Czech Republic
| | - Petr Nemec
- Centre of Cardiovascular Surgery and Transplantation, Brno, Czech Republic.,Department of Cardiovascular Surgery and Transplantation, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Jan Vojacek
- Department of Cardiac Surgery, Charles University, Faculty of Medicine, University Hospital in Hradec Kralove, Hradec Kralove, Czech Republic
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Zijderhand CF, Antonides CFJ, Veen KM, Verkaik NJ, Schoenrath F, Gummert J, Nemec P, Merkely B, Musumeci F, Meyns B, de By TMMH, Bogers AJJC, Caliskan K. Left ventricular assist device related infections and the risk of cerebrovascular accidents: a EUROMACS study. Eur J Cardiothorac Surg 2022; 62:6673908. [PMID: 35997578 PMCID: PMC9536286 DOI: 10.1093/ejcts/ezac421] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 07/28/2022] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVES In patients supported by a durable left ventricular assist device (LVAD), infections are a frequently reported adverse event with increased morbidity and mortality. The purpose of this study was to investigate the possible association between infections and thromboembolic events, most notable cerebrovascular accidents (CVAs), in LVAD patients. METHODS An analysis of the multicentre European Registry for Patients Assisted with Mechanical Circulatory Support was performed. Infections were categorized as VAD-specific infections, VAD-related infections and non-VAD-related infections. An extended Kaplan–Meier analysis for the risk of CVA with infection as a time-dependent covariate and a multivariable Cox proportional hazard model were performed. RESULTS For this analysis, 3282 patients with an LVAD were included with the majority of patients being male (83.1%). During follow-up, 1262 patients suffered from infection, and 457 patients had a CVA. Cox regression analysis with first infection as time-dependent covariate revealed a hazard ratio (HR) for CVA of 1.90 [95% confidence interval (CI): 1.55–2.33; P < 0.001]. Multivariable analysis confirmed the association for infection and CVAs with an HR of 1.99 (95% CI: 1.62–2.45; P < 0.001). With infections subcategorized, VAD-specific HR was 1.56 (95% CI: 1.18–2.08; P 0.002) and VAD-related infections [HR: 1.99 (95% CI: 1.41–2.82; P < 0.001)] remained associated with CVAs, while non-VAD-related infections (P = 0.102) were not. CONCLUSIONS Infection during LVAD support is associated with an increased risk of developing an ischaemic or haemorrhagic CVA, particularly in the setting of VAD-related or VAD-specific infections. This suggests the need of a stringent anticoagulation management and adequate antibiotic treatment during an infection in LVAD-supported patients.
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Affiliation(s)
- Casper F Zijderhand
- Thoraxcenter, Department of Cardiothoracic surgery, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands.,Thoraxcenter, Department of Cardiology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Christiaan F J Antonides
- Thoraxcenter, Department of Cardiology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Kevin M Veen
- Thoraxcenter, Department of Cardiology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Nelianne J Verkaik
- Department of Medical Microbiology and Infectious Diseases, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Felix Schoenrath
- Department of Cardiothoracic and Vascular Surgery, German Heart Center Berlin, Berlin, Germany, DZHK (German Center for Cardiovascular Research), partner site Berlin, Germany
| | - Jan Gummert
- Clinic for Thoracic and Cardiovascular Surgery, Heart and Diabetes Center, NRW, Ruhr University Bochum, Bad Oeynhausen, Germany
| | - Petr Nemec
- Department of Internal Cardiology Medicine, Marasyk University, Brno, Czech Republic
| | - Béla Merkely
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Francesco Musumeci
- Department of Heart and Vessels, Cardiac Surgery Unit and Heart Transplantation Center, S. Camillo-Forlanini Hospital, Roma, Italy
| | - Bart Meyns
- Department of Cardiac Surgery, University Hospitals Leuven, Leuven, Belgium
| | | | - Ad J J C Bogers
- Thoraxcenter, Department of Cardiothoracic surgery, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Kadir Caliskan
- Thoraxcenter, Department of Cardiology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
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Gofus J, Fila P, Drabkova S, Zacek P, Ondrasek J, Nemec P, Sterba J, Tuna M, Jarkovsky J, Vojacek J. Ross procedure provides survival benefit over mechanical valve in adults: a propensity-matched nationwide analysis. Eur J Cardiothorac Surg 2022; 61:1357-1365. [PMID: 35150238 DOI: 10.1093/ejcts/ezac013] [Citation(s) in RCA: 11] [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: 04/25/2021] [Revised: 11/15/2021] [Accepted: 01/05/2022] [Indexed: 12/31/2022] Open
Abstract
OBJECTIVES The choice of optimal surgical treatment for young and middle-aged adults with aortic valve disease remains a challenge. Mechanical aortic valve replacement (mAVR) is generally preferred despite promising recent outcomes of the Ross procedure. Our goal was to compare the strategies at a nationwide level. METHODS This study was a retrospective analysis of prospectively recorded data from the National Registry of Cardiac Surgery of the Czech Republic. Using propensity score matching, we compared the outcomes of patients undergoing the Ross procedure in 2 dedicated centres with all mAVRs performed in country between 2009 and 2020. RESULTS Throughout the study period, 296 adults underwent the Ross procedure and 5120 had an mAVR. We found and compared 291 matched pairs. There were no in-hospital deaths, and the risk of perioperative complications was similar in both groups. Over the average follow-up period of 4.1 vs 6.1 years, the Ross group had a lower all-cause mortality (0.7 vs 6.5%; P = 0.015). This result remained significant even when accounting for cardiac- and valve-related deaths only (P = 0.048). Unlike the Ross group, the mAVR group had a significantly lower relative survival compared with the age- and sex-matched general population. There was no difference in the risk of reoperation (4.5 vs 5.5%; P = 0.66). CONCLUSIONS The Ross procedure offers a significant midterm survival benefit over mAVR. The procedures have a comparable risk of perioperative complications. Patients after mAVR have reduced survival. Thus, the Ross procedure should be the preferred treatment option for young and middle-aged adults with aortic valve disease in dedicated centres.
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Affiliation(s)
- Jan Gofus
- Department of Cardiac Surgery, Charles University, Faculty of Medicine and University Hospital in Hradec Kralove, Hradec Kralove, Czech Republic
| | - Petr Fila
- Department of Cardiac Surgery, Centre of Cardiovascular Surgery and Transplantation, Brno, Czech Republic
| | - Svetlana Drabkova
- Institute of Health Information and Statistics of the Czech Republic, Prague, Czech Republic
| | - Pavel Zacek
- Department of Cardiac Surgery, Charles University, Faculty of Medicine and University Hospital in Hradec Kralove, Hradec Kralove, Czech Republic
| | - Jiri Ondrasek
- Department of Cardiac Surgery, Centre of Cardiovascular Surgery and Transplantation, Brno, Czech Republic
| | - Petr Nemec
- Department of Cardiac Surgery, Centre of Cardiovascular Surgery and Transplantation, Brno, Czech Republic
| | - Jan Sterba
- Department of Cardiac Surgery, Centre of Cardiovascular Surgery and Transplantation, Brno, Czech Republic
| | - Martin Tuna
- Department of Cardiac Surgery, Charles University, Faculty of Medicine and University Hospital in Hradec Kralove, Hradec Kralove, Czech Republic
| | - Jiri Jarkovsky
- Institute of Health Information and Statistics of the Czech Republic, Prague, Czech Republic
| | - Jan Vojacek
- Department of Cardiac Surgery, Charles University, Faculty of Medicine and University Hospital in Hradec Kralove, Hradec Kralove, Czech Republic
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10
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Nemec P, Kolarik M, Fila P. Personalized external aortic root support - how to implant it. Acta Chir Belg 2022; 122:70-73. [PMID: 34791977 DOI: 10.1080/00015458.2021.2008611] [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] [Indexed: 10/19/2022]
Abstract
Personalized External Aortic Root Support (PEARS) is an evolving method of treatment for patients with a dilated aortic root or ascending aorta. This treatment is being adopted in an increasing number of centres. For the sake of the safety of the procedure a standardized surgical technique is necessary. The authors describe a surgical technique of implantation that is derived from their extensive experience.
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Affiliation(s)
- Petr Nemec
- Centre of Cardiovascular Surgery and Transplantation, Brno, Czech Republic
- Department of Cardiovascular Surgery and Transplantation, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Miroslav Kolarik
- Centre of Cardiovascular Surgery and Transplantation, Brno, Czech Republic
| | - Petr Fila
- Centre of Cardiovascular Surgery and Transplantation, Brno, Czech Republic
- Department of Cardiovascular Surgery and Transplantation, Faculty of Medicine, Masaryk University, Brno, Czech Republic
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11
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Zijderhand C, Antonides C, Veen K, Schoenrath F, Gummert J, Nemec P, Merkely B, Musumeci F, Meyns B, De By T, Bogers A, Caliskan K. VAD related infections and the risk of pump thrombosis and thromboembolic events: a EUROMACS study. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.0940] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
In patients supported by a ventricular assist device (VAD) major infections are a frequently reported adverse event with increased morbidity and mortality.
Purpose
The purpose of this study was to investigate the possible association between infections and cerebrovascular accidents (CVAs) in VAD patients.
Methods
An analysis of the European Registry for Patients Assisted with Mechanical Circulatory Support (EUROMACS) was performed identifying all patients aged ≥18 years with a LVAD or BiVAD implantation. Infections were categorized as VAD-specific infections, VAD-related infections and, non-VAD infections. An extended Kaplan-Meier analysis for the risk of CVA and mortality with infection as a time-dependent covariate was performed. Furthermore, a multivariable Cox proportional hazard model was performed including 24 variables.
Results
For this analysis 3784 patients were included, with 45 patients being supported by a BiVAD and 3739 by an LVAD. The majority of patients were male (83.2%) and 60.5% had an INTERMACS patient profile 2 or 3. During follow-up, 3108 major infections were identified in 1385 (36.6%) of the patients, while 673 CVAs were identified in 545 (14.4%) of the patients. Extended Kaplan-Meier analysis with first infection as time-dependent covariate revealed a hazard ratio (HR) for CVA of 1.95 (95% CI: 1.57–2.36; p<0.005) (Figure) and 1.50 (95% CI: 1.33–1.68, p<0.005) for mortality. Multivariable analysis confirmed a significant association for infection and CVAs with a HR of 1.46 (95% CI: 1.29–1.64). With infections subcategorized, VAD-specific (HR: 1.57 (95% CI: 1.18–2.09)) and VAD-related infections (HR: 2.04 (95% CI: 1.44–2.89)) remained significantly associated with CVA but non-VAD infections (HR: 1.22 (95% CI: 0.92–1.64)) were not.
Conclusion
Both VAD-related and VAD-specific infections are associated with a significantly increased risk of CVA with increased risk of mortality.
Funding Acknowledgement
Type of funding sources: None. KM freedom of CVA and infection
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Affiliation(s)
- C.F Zijderhand
- Erasmus University Medical Centre, Cardiothoracic Surgery, Rotterdam, Netherlands (The)
| | - C.F.J Antonides
- Erasmus University Medical Centre, Cardiothoracic Surgery, Rotterdam, Netherlands (The)
| | - K.M Veen
- Erasmus University Medical Centre, Cardiothoracic Surgery, Rotterdam, Netherlands (The)
| | - F Schoenrath
- German Heart Center Berlin, Advanced Heart Failure and Transplant Cardiology, Berlin, Germany
| | - J Gummert
- Herz- und Diabeteszentrum NRW, Ruhr-Universitaet Bochum, Thoracic and Cardiovascular Surgery, Bad Oeynhausen, Germany
| | - P Nemec
- Center of Cardiovascular and Transplant Surgery, Department of Internal Cardiology Medicine, Brno, Czechia
| | - B Merkely
- Semmelweis University Heart and Vascular Center, Budapest, Hungary
| | - F Musumeci
- San Camillo hospital, Cardiac Surgery and Transplantation, Roma, Italy
| | - B Meyns
- University Hospitals (UZ) Leuven, Department of Cardiac Surgery, Leuven, Belgium
| | - T De By
- Erasmus University Medical Centre, Cardiothoracic Surgery, Rotterdam, Netherlands (The)
| | - A.J.J.C Bogers
- Erasmus University Medical Centre, Cardiothoracic Surgery, Rotterdam, Netherlands (The)
| | - K Caliskan
- Erasmus University Medical Centre, Cardiology, Rotterdam, Netherlands (The)
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12
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Visseren T, Erler NS, Polak WG, Adam R, Karam V, Vondran FWR, Ericzon BG, Thorburn D, IJzermans JNM, Paul A, van der Heide F, Taimr P, Nemec P, Pirenne J, Romagnoli R, Metselaar HJ, Darwish Murad S. Recurrence of primary sclerosing cholangitis after liver transplantation - analysing the European Liver Transplant Registry and beyond. Transpl Int 2021; 34:1455-1467. [PMID: 34028110 PMCID: PMC8456806 DOI: 10.1111/tri.13925] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [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: 03/28/2021] [Revised: 05/15/2021] [Accepted: 05/18/2021] [Indexed: 11/26/2022]
Abstract
Liver transplantation for primary sclerosing cholangitis (PSC) can be complicated by recurrence of PSC (rPSC). This may compromise graft survival but the effect on patient survival is less clear. We investigated the effect of post‐transplant rPSC on graft and patient survival in a large European cohort. Registry data from the European Liver Transplant Registry regarding all first transplants for PSC between 1980 and 2015 were supplemented with detailed data on rPSC from 48 out of 138 contributing transplant centres, involving 1,549 patients. Bayesian proportional hazards models were used to investigate the impact of rPSC and other covariates on patient and graft survival. Recurrence of PSC was diagnosed in 259 patients (16.7%) after a median follow‐up of 5.0 years (quantile 2.5%‐97.5%: 0.4–18.5), with a significant negative impact on both graft (HR 6.7; 95% CI 4.9–9.1) and patient survival (HR 2.3; 95% CI 1.5–3.3). Patients with rPSC underwent significantly more re‐transplants than those without rPSC (OR 3.6, 95% CI 2.7–4.8). PSC recurrence has a negative impact on both graft and patient survival, independent of transplant‐related covariates. Recurrence of PSC leads to higher number of re‐transplantations and a 33% decrease in 10‐year graft survival.
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Affiliation(s)
- Thijmen Visseren
- Department of Gastroenterology and Hepatology, Erasmus MC Transplant Institute, Erasmus MC University Medical Center Rotterdam, Rotterdam, The Netherlands.,Department of Surgery, Division of Hepatopancreaticobiliary and Transplant Surgery, Erasmus MC Transplant Institute, Erasmus MC University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Nicole Stephanie Erler
- Department of Biostatistics, Erasmus MC University Medical Center Rotterdam, Rotterdam, The Netherlands.,Department of Epidemiology, Erasmus MC University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Wojciech Grzegorz Polak
- Department of Surgery, Division of Hepatopancreaticobiliary and Transplant Surgery, Erasmus MC Transplant Institute, Erasmus MC University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - René Adam
- Centre Hépatobiliaire, AP-HP Hôpital Paul Brousse, Université Paris-Saclay, Villejuif, France
| | - Vincent Karam
- Centre Hépatobiliaire, AP-HP Hôpital Paul Brousse, Université Paris-Saclay, Villejuif, France
| | | | - Bo-Goran Ericzon
- Division of Transplantation Surgery, Karolinska University Hospital, Stockholm, Sweden
| | - Douglas Thorburn
- Sheila Sherlock Liver Centre and UCL Institute of Liver and Digestive Health, Royal Free Hospital, London, UK
| | - Jan Nicolaas Maria IJzermans
- Department of Surgery, Division of Hepatopancreaticobiliary and Transplant Surgery, Erasmus MC Transplant Institute, Erasmus MC University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Andreas Paul
- Department of General and Transplant Surgery, University Hospital Essen, Essen, Germany
| | - Frans van der Heide
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Centre Groningen, Groningen, The Netherlands
| | - Pavel Taimr
- Department of Hepatogastroenterology, Institut Klinické Experimentální Medicíny, Prague, Czech Republic
| | - Petr Nemec
- Centre of Cardiovascular Surgery and Transplantations, Brno, Czech Republic
| | - Jacques Pirenne
- Abdominal Transplantation Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Renato Romagnoli
- Liver Transplantation Center, Azienda Ospedaliero-Universitaria, Città della Salute e della Scienza di Torino, Turin, Italy
| | - Herold Johnny Metselaar
- Department of Gastroenterology and Hepatology, Erasmus MC Transplant Institute, Erasmus MC University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Sarwa Darwish Murad
- Department of Gastroenterology and Hepatology, Erasmus MC Transplant Institute, Erasmus MC University Medical Center Rotterdam, Rotterdam, The Netherlands
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13
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Bedanova H, Ondrasek J, Filipensky P, Nemec P, Dobsak P. Inverted Takotsubo Cardiomyopathy as an Early Complication After Liver Transplantation. Am J Case Rep 2021; 22:e930484. [PMID: 33894054 PMCID: PMC8083814 DOI: 10.12659/ajcr.930484] [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: 11/09/2022]
Abstract
BACKGROUND Takotsubo cardiomyopathy (TTC) is a cardiac syndrome characterized by transient left ventricle (LV) dysfunction, typically showing apical ballooning due to apical akinesis with preserved basal segment contractility. The inverted form is very uncommon and is characterized by basal segment hypokinesis or akinesis and normal LV apical segment contractility. CASE REPORT We describe the case of a 49-year-old woman who developed inverted TTC after orthotopic liver transplantation. On day 1 (D1), dyspnea and oliguria suddenly appeared. A chest X-ray showed pulmonary edema, and echocardiography showed severe systolic LV dysfunction with an estimated ejection fraction of approximately 25% and akinesis of basal and midventricular LV segments, normal apical segment contractility, and mild mitral regurgitation. Elevated troponin T, creatine kinase-MB, and N-terminal pro B-type natriuretic peptide were found in the blood sample. Suspected inverted takotsubo cardiomyopathy was confirmed by left ventriculography, with normal apical part motion, akinesis in the other LV parts, and negative coronary angiography. The echocardiographic findings returned to normal on D14, and the patient was discharged from the hospital on D19 with normal LV motion and an ejection fraction of 65%. The transplanted liver function was excellent. CONCLUSIONS Organ transplantation is connected with a great emotional stress because the patient's life depends on the death of another person. Therefore, we have to think about the possibility of stress cardiomyopathy even after liver transplantation, because early diagnosis and treatment can be life-saving for the patient. To our knowledge, this is the first described case of inverted takotsubo cardiomyopathy after liver transplantation.
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Affiliation(s)
- Helena Bedanova
- Department of Transplantology, Center of Cardiovascular and Transplant Surgery, Brno, Czech Republic
| | - Jiri Ondrasek
- Department of Transplantology, Center of Cardiovascular and Transplant Surgery, Brno, Czech Republic
| | - Petr Filipensky
- Department of Urology, St. Ann's University Hospital and Masaryk University, Brno, Czech Republic
| | - Petr Nemec
- Department of Surgery, Center of Cardiovascular and Transplantation Surgery, Brno, Czech Republic
| | - Petr Dobsak
- Department of Sports Medicine and Rehabilitation, St. Ann's University Hospital and Masaryk University, Brno, Czech Republic
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14
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Bedanova H, Horvath V, Ondrasek J, Krejci J, Dobsak P, Nemec P. Metformin therapy and risk of cancer in patients after heart transplantation. ACTA ACUST UNITED AC 2021; 122:305-309. [PMID: 33848178 DOI: 10.4149/bll_2021_051] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Diabetes mellitus (DM) and malignancy are recognized among the most common complications increasing mortality in patients after heart transplantation (HTx). Clinical trials have shown a higher risk for different types of tumours in diabetic patients. This risk is potentiated by immunosuppressive therapy in transplant patients. Biguanide metformin has been shown to exhibit anti-tumour activity and we tried to find out whether this effect is valid for heart transplant patients. METHODS We retrospectively analysed a group of 497 patients, who undergone HTx in our centre between 1998 and 2019. The primary outcome was any malignancy during the 15-year follow-up period and patient's survival. RESULTS Out of the 497 patients enrolled in the study, 279 (56 %) had diabetes and 52 (19 %) were treated with metformin. Fifteen-year survival in treated patients without malignancy was 93 %, the remainder for the DM patients was 56 %, with survival in non-DM patients being 74 %. Untreated diabetic patients had 4.7 times higher chance of malignancy than those on metformin (p = 0.01). Fifteen-year survival in metformin treated patients was 53 %, in other DM patients 44 %, and in non-DM patients 51 %. CONCLUSION Our study showed a significantly lower incidence of malignancies in metformin-treated patients and slightly better overall survival (Tab. 2, Fig. 3, Ref. 19) Keywords: biguanide, heart graft, malignancy, diabetes mellitus, survival.
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15
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Fournier S, Toth GG, De Bruyne B, Kala P, Ribichini FL, Casselman F, Ramos R, Piroth Z, Piccoli A, Penicka M, Mates M, Nemec P, Van Praet F, Stockman B, Degriek I, Pellicano M, Barbato E. Changes in surgical revascularization strategy after fractional flow reserve. Catheter Cardiovasc Interv 2021; 98:E351-E355. [PMID: 33837987 DOI: 10.1002/ccd.29694] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 02/15/2021] [Accepted: 03/14/2021] [Indexed: 11/05/2022]
Abstract
AIMS In the randomized GRAFFITI trial, surgeons drew their strategy based on coronary angiography. When patients were randomized to fractional flow reserve (FFR)-guidance, surgeons were informed of the FFR values and asked to redraw their strategy. The aim of this study was to investigate the changes induced by FFR knowledge. METHODS AND RESULTS The intended and performed strategy (before and after FFR) were compared. Among 172 patients, 84 with 300 lesions were randomized to the FFR-guided group. The intended strategy was to bypass 236 stenoses:108 with a venous and 128 with an arterial graft. After disclosing FFR, a change in strategy occurred in 64 lesions (21.3%) of 48 (55%) patients. Among 64 lesions for which the intended strategy was medical therapy, 16 (25%) were bypassed after disclosing FFR. The number of procedures with >1 venous graft planned was significantly reduced from 37 to 27 patients (p = .031). The proportion of on-pump surgery was significantly reduced from 71 to 61 patients (p = .006). The rates of clinical events at 1 year were similar between patients with or without at least one change in strategy. DISCUSSION FFR-guided CABG is associated with a simplified surgical procedure in 55% of the patients, with similar clinical outcomes.
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Affiliation(s)
- Stephane Fournier
- Department of Cardiology, Lausanne University Center Hospital, Lausanne, Switzerland.,Cardiovascular Research Center Aalst, OLV Clinic, Aalst, Belgium.,Department of Advanced Biomedical Sciences, Federico II University, Naples, Italy
| | - Gabor G Toth
- University Heart Center Graz, Department of Cardiology, Medical University Graz, Graz, Austria
| | - Bernard De Bruyne
- Department of Cardiology, Lausanne University Center Hospital, Lausanne, Switzerland.,Cardiovascular Research Center Aalst, OLV Clinic, Aalst, Belgium
| | - Petr Kala
- Department of Cardiology and Internal Medicine, University Hospital Brno and Medical Faculty of Masaryk University, Brno, Czech Republic
| | - Flavio L Ribichini
- Division of Cardiology, Department of Medicine, University of Verona, Verona, Italy
| | - Filip Casselman
- Cardiovascular Research Center Aalst, OLV Clinic, Aalst, Belgium
| | - Ruben Ramos
- Department of Cardiology, Hospital Santa Marta-Centro Hospitalar Lisboa Central, Lisbon, Portugal
| | - Zsolt Piroth
- Department of Cardiology, Hungarian Institute of Cardiology, Budapest, Hungary
| | - Anna Piccoli
- Division of Cardiology, Department of Medicine, University of Verona, Verona, Italy
| | - Martin Penicka
- Cardiovascular Research Center Aalst, OLV Clinic, Aalst, Belgium
| | - Martin Mates
- Cardiovascular Center, Na Homolce Hospital, Prague, Czech Republic
| | - Petr Nemec
- Cardiovascular Center, Na Homolce Hospital, Prague, Czech Republic
| | - Frank Van Praet
- Cardiovascular Research Center Aalst, OLV Clinic, Aalst, Belgium
| | - Bernard Stockman
- Cardiovascular Research Center Aalst, OLV Clinic, Aalst, Belgium
| | - Ivan Degriek
- Cardiovascular Research Center Aalst, OLV Clinic, Aalst, Belgium
| | | | - Emanuele Barbato
- Cardiovascular Research Center Aalst, OLV Clinic, Aalst, Belgium.,Department of Advanced Biomedical Sciences, Federico II University, Naples, Italy
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16
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Mach L, Bedanova H, Madrova M, Soucek M, Karpisek M, Nemec P, Konecny T, Orban M. Humoral profile of epicardial adipose tissue was not predictive of 6-year mortality after a major cardiac surgery, possible implications for inflammatory theory of atherosclerosis pathogenesis. Atherosclerosis 2020. [DOI: 10.1016/j.atherosclerosis.2020.10.373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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17
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Nemec P, Pepper J, Fila P. Personalized external aortic root support. Interact Cardiovasc Thorac Surg 2020; 31:342-345. [PMID: 32761056 DOI: 10.1093/icvts/ivaa111] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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: 01/23/2020] [Revised: 05/06/2020] [Accepted: 05/10/2020] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVES Implantation of a personalized external aortic root support (PEARS) can prevent dilatation of the aortic root and ascending aorta in patients with aortopathy of various aetiologies. Because PEARS is an emerging technology, all aspects concerning indications, surgical technique and safety should be elucidated. Our goal was to summarize all of these aspects so that physicians and patients would have sufficient information to evaluate this alternative approach. METHODS Between April 2004 and March 2020, 317 patients underwent PEARS operations at 25 surgical centres in 9 countries. RESULTS The most common indication was Marfan syndrome (57%). The single perioperative death represented a mortality of 0.3%. The long-term experience comprises 871 patient/years with 1 patient living for 15 years and 19 patients living for more than 10 years. CONCLUSIONS PEARS seems to be a promising method of treatment of dilatation of the aortic root and/or ascending aorta. Multicentre observational studies are needed to gain more experience because this operation is still uncommon and the number of operations per surgeon/centre is low.
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Affiliation(s)
- Petr Nemec
- Centre of Cardiovascular Surgery and Transplantations, Brno, Czech Republic
| | | | - Petr Fila
- Centre of Cardiovascular Surgery and Transplantations, Brno, Czech Republic
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18
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Løgstrup BB, Nemec P, Schoenrath F, Gummert J, Pya Y, Potapov E, Netuka I, Ramjankhan F, Parner ET, De By T, Eiskjaer H. Heart failure etiology and risk of right heart failure in adult left ventricular assist device support: the European Registry for Patients with Mechanical Circulatory Support (EUROMACS). SCAND CARDIOVASC J 2020; 54:306-314. [PMID: 32552049 DOI: 10.1080/14017431.2020.1781239] [Citation(s) in RCA: 3] [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] [Indexed: 10/24/2022]
Abstract
Objectives: Development of right ventricular failure (RVF) after left ventricular assist device (LVAD) implantation remains a leading cause of perioperative morbidity, end-organ dysfunction and mortality. The objective of this study was to investigate whether the etiology of HF (ischemic HF versus non-ischemic HF) affects the risk of RVF within admission for LVAD implantation and during long-term follow-up. Methods: Between January 2011 and June 27, 2018, 3536 patients were prospectively enrolled into EUROMACS registry. Adult patients (>18 years) who received a first time LVAD were included. When excluding patients with congenital, restrictive, hypertrophic, valvular cardiomyopathies, and myocarditis the total population consisted of 2404 patients. Results: The total cohort consists of 2404 patients. Mean age were 55 years and predominantly male sex [2024 (84.2%)]. At the time of LVAD implantation 1355 (56.4%) patients had ischemic HF and 1049 (43.6%) patients had non-ischemic HF. The incidence of RVF was significantly increased in the non-ischemic HF group in the adjusted model (p = .026). The relative risk difference for RVF in patients with non-ischemic HF was in the adjusted model increased by an absolute value of 5.1% (95% CI: 0.61-9.6). In the ischemic HF group 76 patients (13.4%) developed late RVF and 62 patients (14.8%) in the non-ischemic HF group (p = .56). No differences in occurrence of RVF between HF etiology was observed after 2 and 4 years of follow-up, respectively (crude: p = .25, adjusted (sex and age) p = .2 and crude: p = .59, adjusted (sex and age) p = .44). Conclusions: Patients with non-ischemic HF undergoing LVAD had an increased incidence of early RVF compared to patients with ischemic HF in a large European population. During follow-up after discharge 14% patients developed RVF. We recommend HF etiology to be considered in identifying patients who are at risk for postoperative RVF after LVAD implantation.
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Affiliation(s)
| | - Petr Nemec
- Centre for Cardiovascular Surgery and Transplantation, Brno, Czech Republic
| | - Felix Schoenrath
- Department of Cardiac, Thoracic and Vascular Surgery, German Heart Institute, Berlin, Germany.,DZHK (German Centre for Cardiovascular Research), Berlin, Germany
| | - Jan Gummert
- Clinic for Thoracic and Cardiovascular Surgery, Heart and Diabetes Center NRW, Ruhr University Bochum, Bad Oeynhausen, Germany
| | - Yuri Pya
- Department of Adult Cardiac Surgery, National Research Center for Cardiac Surgery, Astana, Kazakhstan
| | - Evgenij Potapov
- Department of Cardiac, Thoracic and Vascular Surgery, German Heart Institute, Berlin, Germany
| | - Ivan Netuka
- Institute for Clinical and Experimental Medicine (IKEM), Prague, Czech Republic
| | | | - Eric Thorlund Parner
- Department of Public Health, Section for Biostatistics, Aarhus University, Aarhus, Denmark
| | - Theo De By
- EUROMACS, European Registry for Patients with Mechanical Circulatory Support, EACTS, Windsor, UK
| | - Hans Eiskjaer
- Department of Cardiology, Aarhus University Hospital, Aarhus, Denmark
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19
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Bedanova H, Pazdernik M, Sonka M, Zhi C, Krejci J, Novakova M, Dobsak P, Nemec P. Effects of implanting a long-term left ventricle assist device on post-transplant outcomes. Int J Artif Organs 2020; 44:39-45. [PMID: 32329386 DOI: 10.1177/0391398820914626] [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] [Indexed: 11/17/2022]
Abstract
BACKGROUND An increasing number of patients are receiving left ventricle assist devices as a bridge to heart transplantation. The aim of this study was to determine the difference between patients who received transplants from a left ventricle assist device and those who underwent heart transplantation without a prior left ventricle assist device implantation. MATERIAL AND METHODS The study included patients who underwent heart transplantation in our institute between January 2010 and November 2018. The following clinical variables were evaluated: donor characteristics, patient's pre-transplant demographical data, post-transplant data, and patient survival. Cardiac allograft vasculopathy progression was prospectively examined (after 1 month and 12 months after heart transplantation) by coronary optical coherence tomography. We were interested in the difference in 1- and 5-year survival between the left ventricle assist device and non-left ventricle assist device groups. RESULTS A total of 248 patients were identified; out of them, 48 patients received a left ventricle assist device before heart transplantation, whereas 200 had transplants with no prior left ventricle assist device implantation. There were no significant differences in any donor characteristics. The mean duration of cardiopulmonary bypass time in the non-left ventricle assist device group was 156 versus 175 min in the left ventricle assist device group (p = 0.009), blood loss was 650 versus 1045 mL (p < 0.001), the need to implant an extracorporeal membrane oxygenation was 10% versus 23% (p = 0.02). There was no difference in cardiac allograft vasculopathy progression between the groups 1 year after heart transplantation (p = 0.528). The 1- and 5-year survival, according to Kaplan-Meier, was 80% and 70% in the left ventricle assist device group, compared to 80% and 73%, respectively, in the non-left ventricle assist device group (Log-rank test: p = 0.945). CONCLUSION Our results indicate that patients undergoing heart transplantation from left ventricle assist devices suffer significantly more from intraoperative and post-operative complications; however, only insignificant cardiac allograft vasculopathy progression and survival differences between the two groups were observed.
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Affiliation(s)
- Helena Bedanova
- Center of Cardiovascular and Transplant Surgery Brno, Brno, Czech Republic
| | - Michal Pazdernik
- Department of Cardiology, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | | | - Chen Zhi
- The University of Iowa, Iowa City, IA, USA
| | - Jan Krejci
- Department of Sports Medicine and Rehabilitation, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Marie Novakova
- Department of Sports Medicine and Rehabilitation, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Petr Dobsak
- Department of Sports Medicine and Rehabilitation, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Petr Nemec
- Center of Cardiovascular and Transplant Surgery Brno, Brno, Czech Republic
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20
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Antonides C, Veen K, Schönrath F, Gummert J, Nemec P, Merkely B, Musumeci F, Meyns B, de By T, Bogers A, Caliskan K. VAD-Related and Specific Infections are Significantly Associated with an Increased Risk of Cerebrovascular Accidents in Patients Supported by a Ventricular Assist Device: An EUROMACS Analysis. J Heart Lung Transplant 2020. [DOI: 10.1016/j.healun.2020.01.1214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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21
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Pesl M, Jelinkova S, Caluori G, Holicka M, Krejci J, Nemec P, Kohutova A, Zampachova V, Dvorak P, Rotrekl V. Cardiovascular progenitor cells and tissue plasticity are reduced in a myocardium affected by Becker muscular dystrophy. Orphanet J Rare Dis 2020; 15:65. [PMID: 32138751 PMCID: PMC7057505 DOI: 10.1186/s13023-019-1257-4] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 11/19/2019] [Indexed: 02/06/2023] Open
Abstract
Abstract We describe the association of Becker muscular dystrophy (BMD) derived heart failure with the impairment of tissue homeostasis and remodeling capabilities of the affected heart tissue. We report that BMD heart failure is associated with a significantly decreased number of cardiovascular progenitor cells, reduced cardiac fibroblast migration, and ex vivo survival. Background Becker muscular dystrophy belongs to a class of genetically inherited dystrophin deficiencies. It affects male patients and results in progressive skeletal muscle degeneration and dilated cardiomyopathy leading to heart failure. It is a relatively mild form of dystrophin deficiency, which allows patients to be on a heart transplant list. In this unique situation, the explanted heart is a rare opportunity to study the degenerative process of dystrophin-deficient cardiac tissue. Heart tissue was excised, dissociated, and analyzed. The fractional content of c-kit+/CD45− cardiovascular progenitor cells (CVPCs) and cardiac fibroblast migration were compared to control samples of atrial tissue. Control tissue was obtained from the hearts of healthy organ donor’s during heart transplantation procedures. Results We report significantly decreased CVPCs (c-kit+/CD45−) throughout the heart tissue of a BMD patient, and reduced numbers of phase-bright cells presenting c-kit positivity in the dystrophin-deficient cultured explants. In addition, ex vivo CVPCs survival and cardiac fibroblasts migration were significantly reduced, suggesting reduced homeostatic support and irreversible tissue remodeling. Conclusions Our findings associate genetically derived heart failure in a dystrophin-deficient patient with decreased c-kit+/CD45− CVPCs and their resilience, possibly hinting at a lack of cardioprotective capability and/or reduced homeostatic support. This also correlates with reduced plasticity of the explanted cardiac tissue, related to the process of irreversible remodeling in the BMD patient’s heart.
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Affiliation(s)
- Martin Pesl
- Department of Biology, Faculty of Medicine, Masaryk University, Kamenice 5, Brno, 62500, Czech Republic.,International Clinical Research Center, (ICRC), St. Anne's University Hospital, Pekarska 53, Brno, 65691, Czech Republic.,1st Department of Cardiovascular Diseases, St. Anne's University Hospital and Masaryk University, Pekarska 53, Brno, 65691, Czech Republic
| | - Sarka Jelinkova
- Department of Biology, Faculty of Medicine, Masaryk University, Kamenice 5, Brno, 62500, Czech Republic.,International Clinical Research Center, (ICRC), St. Anne's University Hospital, Pekarska 53, Brno, 65691, Czech Republic
| | - Guido Caluori
- International Clinical Research Center, (ICRC), St. Anne's University Hospital, Pekarska 53, Brno, 65691, Czech Republic.,Central European Institute of Technology (CEITEC MU), Nanobiotechnology, Kamenice 5, Brno, 62500, Czech Republic
| | - Maria Holicka
- Department of Cardiology, University Hospital Brno, Jihlavska 20, Brno, 62500, Czech Republic
| | - Jan Krejci
- 1st Department of Cardiovascular Diseases, St. Anne's University Hospital and Masaryk University, Pekarska 53, Brno, 65691, Czech Republic
| | - Petr Nemec
- Center for Cardiovascular Surgery and Transplantation, Pekarska 53, Brno, 65691, Czech Republic
| | - Aneta Kohutova
- Department of Biology, Faculty of Medicine, Masaryk University, Kamenice 5, Brno, 62500, Czech Republic.,International Clinical Research Center, (ICRC), St. Anne's University Hospital, Pekarska 53, Brno, 65691, Czech Republic
| | - Vita Zampachova
- 1st Department of Pathology, Faculty of Medicine, Masaryk University and St. Anne's University Hospital in Brno, Pekarska 53, Brno, 65691, Czech Republic
| | - Petr Dvorak
- Department of Biology, Faculty of Medicine, Masaryk University, Kamenice 5, Brno, 62500, Czech Republic
| | - Vladimir Rotrekl
- Department of Biology, Faculty of Medicine, Masaryk University, Kamenice 5, Brno, 62500, Czech Republic. .,International Clinical Research Center, (ICRC), St. Anne's University Hospital, Pekarska 53, Brno, 65691, Czech Republic.
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22
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Novak M, Nemec P, Sebo M, Veteskova L, Rezek M. P258 Giant coronary arteriovenous fistula with significant left-to-right shunt in symptomatic patient - a multimodal diagnostic approach and successful surgical treatment. Eur Heart J Cardiovasc Imaging 2020. [DOI: 10.1093/ehjci/jez319.119] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Funding Acknowledgements
none
OnBehalf
none
Coronary arteriovenous fistula (CAF) is a rare usually congenital defect that occurs in 0.1-0.2% of patients undergoing coronary angiography. A left-to-right shunt exists in more than 90% cases. In approximately 20% of patients CAF is accompanied with coronary artery aneurysm (CAA).
We describe a case of 65-years-old woman with history of murmur from childhood, who presents with symptoms of slowly worsening dyspnea on exertion and strong pericardial pain. A suspicion for CAF was made from echocardiography and finally confirmed by other diagnostic modalities (coronary angiography and computed tomography with 3D reconstructions). We have diagnosed a complex case of a giant CAA involving left main and a periphery of left circumflex artery, accompanied with CAF terminating in the right atrium, responsible for a significant left-to-right shunt and coronary steal phenomenon.
Patient was successfully treated by surgical ligation of the distal part of CAF in the right atrium. There were no signs of an acute myocardial ischemia on beating heart (ECG, perioperative echocardiography) when CAF was temporary occluded by tourniquet and so definitive surgical ligation of CAF was performed back on cardiopulmonary bypass. The postoperative course was uneventful without complications and the patient was discharged 6 days after surgery.
One year after surgery patient is doing well with no complaints. Control echocardiography showed a regression of left and right ventricle volume overload. Coronary angiography showed normal perfusion in the left coronary artery territory, and no more visible collaterals flow right coronary artery.
Abstract P258 Figure. complex coronary artery aneurysm
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Affiliation(s)
- M Novak
- St. Anne University Hospital Brno (FNUSA), Brno, Czechia
| | - P Nemec
- The Cardiovascular and Transplant Surgery Centre, Cardiosurgery, Brno, Czechia
| | - M Sebo
- The Cardiovascular and Transplant Surgery Centre, Cardiosurgery, Brno, Czechia
| | - L Veteskova
- The Cardiovascular and Transplant Surgery Centre, Cardiosurgery, Brno, Czechia
| | - M Rezek
- St. Anne University Hospital Brno (FNUSA), Brno, Czechia
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23
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Toth GG, De Bruyne B, Kala P, Ribichini FL, Casselman F, Ramos R, Piroth Z, Fournier S, Piccoli A, Van Mieghem C, Penicka M, Mates M, Nemec P, Van Praet F, Stockman B, Degriek I, Barbato E. Graft patency after FFR-guided versus angiography-guided coronary artery bypass grafting: the GRAFFITI trial. EUROINTERVENTION 2019; 15:e999-e1005. [DOI: 10.4244/eij-d-19-00463] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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24
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Reichlova H, Janda T, Godinho J, Markou A, Kriegner D, Schlitz R, Zelezny J, Soban Z, Bejarano M, Schultheiss H, Nemec P, Jungwirth T, Felser C, Wunderlich J, Goennenwein STB. Imaging and writing magnetic domains in the non-collinear antiferromagnet Mn 3Sn. Nat Commun 2019; 10:5459. [PMID: 31784509 PMCID: PMC6884521 DOI: 10.1038/s41467-019-13391-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 11/04/2019] [Indexed: 11/08/2022] Open
Abstract
Non-collinear antiferromagnets are revealing many unexpected phenomena and they became crucial for the field of antiferromagnetic spintronics. To visualize and prepare a well-defined domain structure is of key importance. The spatial magnetic contrast, however, remains extraordinarily difficult to be observed experimentally. Here, we demonstrate a magnetic imaging technique based on a laser induced local thermal gradient combined with detection of the anomalous Nernst effect. We employ this method in one the most actively studied representatives of this class of materials-Mn3Sn. We demonstrate that the observed contrast is of magnetic origin. We further show an algorithm to prepare a well-defined domain pattern at room temperature based on heat assisted recording principle. Our study opens up a prospect to study spintronics phenomena in non-collinear antiferromagnets with spatial resolution.
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Affiliation(s)
- Helena Reichlova
- Institut für Festkörper- und Materialphysik and Würzburg-Dresden Cluster of Excellence ct.qmat, Technische Universität Dresden, 01062, Dresden, Germany.
| | - Tomas Janda
- Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, 121 16, Prague 2, Czech Republic
| | - Joao Godinho
- Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, 121 16, Prague 2, Czech Republic
- Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, 162 00, Praha 6, Czech Republic
| | - Anastasios Markou
- Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, 01187, Dresden, Germany
| | - Dominik Kriegner
- Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, 162 00, Praha 6, Czech Republic
- Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, 01187, Dresden, Germany
| | - Richard Schlitz
- Institut für Festkörper- und Materialphysik and Würzburg-Dresden Cluster of Excellence ct.qmat, Technische Universität Dresden, 01062, Dresden, Germany
| | - Jakub Zelezny
- Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, 162 00, Praha 6, Czech Republic
| | - Zbynek Soban
- Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, 162 00, Praha 6, Czech Republic
| | - Mauricio Bejarano
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, Bautzner Landstraße 400, 01328, Dresden, Germany
| | - Helmut Schultheiss
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, Bautzner Landstraße 400, 01328, Dresden, Germany
| | - Petr Nemec
- Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, 121 16, Prague 2, Czech Republic
| | - Tomas Jungwirth
- Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, 162 00, Praha 6, Czech Republic
- School of Physics and Astronomy, University of Nottingham, NG7 2RD, Nottingham, UK
| | - Claudia Felser
- Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, 01187, Dresden, Germany
| | - Joerg Wunderlich
- Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, 162 00, Praha 6, Czech Republic
- Hitachi Cambridge Laboratory, Cambridge, CB3 0HE, UK
| | - Sebastian T B Goennenwein
- Institut für Festkörper- und Materialphysik and Würzburg-Dresden Cluster of Excellence ct.qmat, Technische Universität Dresden, 01062, Dresden, Germany
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25
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Wagner R, Soucek P, Ondrasek J, Fila P, Sterba J, Spacilova H, Michalcikova A, Freiberger T, Nemec P. Plasma Levels of Myocardial MicroRNA-133a Increase by Intraoperative Cytokine Hemoadsorption in the Complex Cardiovascular Operation. J Clin Med Res 2019; 11:789-797. [PMID: 31803323 PMCID: PMC6879038 DOI: 10.14740/jocmr3989] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 09/06/2019] [Accepted: 10/10/2019] [Indexed: 02/06/2023] Open
Abstract
Background Complex cardiovascular procedures may initiate a systemic inflammatory response syndrome (SIRS) with a massive cytokine release, which is involved in postoperative myocardial injury. Intraoperative cytokine hemoadsorption (HA) mitigates the inflammatory response. Micro ribonucleic acids (miRNAs) are emerging as a marker of myocardial injury. Methods This study evaluated if intraoperative cytokine reduction by HA modulates SIRS and affects myocardial injury as measured by miRNA-126, 223 and miRNA-1, 133a, respectively. Twenty-eight patients were assigned into HA (n = 15) and control (C) (n = 13) groups. HA was performed by integrating CytoSorb™ into the extracorporeal circuit. Results MiRNA-133a plasma levels were increased postoperatively in both groups but were much higher in the HA group than in the C group at 3 h (P = 0.037) and 18 h (P = 0.017) after reperfusion. MiRNA-1 and miRNA-223 plasma levels were significantly increased postoperatively, but did not differ between groups. The vascular miRNA-126 was not affected. Conclusion Intraoperative cytokine HA in cardiovascular operations increased the plasma levels of miRNA-133a, suggesting higher myocardial injury.
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Affiliation(s)
- Robert Wagner
- Department of Cardiac Anesthesia, Centre for Cardiovascular and Transplant Surgery (CKTCH), Pekarska 53, Brno, Czech Republic.,These authors contributed equally to this manuscript
| | - Premysl Soucek
- Department of Molecular Genetics, Centre for Cardiovascular and Transplant Surgery (CKTCH), Pekarska 53, Brno, Czech Republic.,These authors contributed equally to this manuscript
| | - Jiri Ondrasek
- Department of Cardiovascular Surgery, Centre for Cardiovascular and Transplant Surgery (CKTCH), Pekarska 53, Brno, Czech Republic
| | - Petr Fila
- Department of Cardiovascular Surgery, Centre for Cardiovascular and Transplant Surgery (CKTCH), Pekarska 53, Brno, Czech Republic
| | - Jan Sterba
- Department of Cardiovascular Surgery, Centre for Cardiovascular and Transplant Surgery (CKTCH), Pekarska 53, Brno, Czech Republic
| | - Hana Spacilova
- Department of Hematological Laboratory, Centre for Cardiovascular and Transplant Surgery (CKTCH), Pekarska 53, Brno, Czech Republic
| | - Alzbeta Michalcikova
- Department of Psychology, Centre for Cardiovascular and Transplant Surgery (CKTCH), Pekarska 53, Brno, Czech Republic
| | - Tomas Freiberger
- Department of Molecular Genetics, Centre for Cardiovascular and Transplant Surgery (CKTCH), Pekarska 53, Brno, Czech Republic
| | - Petr Nemec
- Department of Cardiovascular Surgery, Centre for Cardiovascular and Transplant Surgery (CKTCH), Pekarska 53, Brno, Czech Republic
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26
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Bulai G, Pompilian O, Gurlui S, Nemec P, Nazabal V, Cimpoesu N, Chazallon B, Focsa C. Ge-Sb-Te Chalcogenide Thin Films Deposited by Nanosecond, Picosecond, and Femtosecond Laser Ablation. Nanomaterials (Basel) 2019; 9:E676. [PMID: 31052395 PMCID: PMC6567795 DOI: 10.3390/nano9050676] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [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: 03/23/2019] [Revised: 04/18/2019] [Accepted: 04/23/2019] [Indexed: 12/20/2022]
Abstract
Ge-Sb-Te thin films were obtained by ns-, ps-, and fs-pulsed laser deposition (PLD) in various experimental conditions. The thickness of the samples was influenced by the Nd-YAG laser wavelength, fluence, target-to-substrate distance, and deposition time. The topography and chemical analysis results showed that the films deposited by ns-PLD revealed droplets on the surface together with a decreased Te concentration and Sb over-stoichiometry. Thin films with improved surface roughness and chemical compositions close to nominal values were deposited by ps- and fs-PLD. The X-ray diffraction and Raman spectroscopy results showed that the samples obtained with ns pulses were partially crystallized while the lower fluences used in ps- and fs-PLD led to amorphous depositions. The optical parameters of the ns-PLD samples were correlated to their structural properties.
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Affiliation(s)
- Georgiana Bulai
- Integrated Centre for Environmental Science Studies in the North-East Development Region-CERNESIM, "Al. I. Cuza" University of Iasi, 700506 Iasi, Romania.
| | - Oana Pompilian
- Université de Lille, CNRS, UMR 8523-PhLAM-Physique des Lasers, Atomes et Molécules, CERLA-Centre d'Etudes et de Recherches Lasers et Applications, Lille F-59000, France.
- National Institute for Lasers, Plasma and Radiation Physics, RO-077125 Magurele-Bucharest, Romania.
| | - Silviu Gurlui
- Faculty of Physics, "Al. I. Cuza" University of Iasi, 700506 Iasi, Romania.
| | - Petr Nemec
- Faculty of Chemical Technology, University of Pardubice, 53210 Pardubice, Czech Republic.
| | - Virginie Nazabal
- Faculty of Chemical Technology, University of Pardubice, 53210 Pardubice, Czech Republic.
- Université de Rennes 1, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)⁻UMR 6226, F-35000 Rennes, France.
| | - Nicanor Cimpoesu
- Faculty of Materials Science and Engineering, "Gheorghe Asachi" Technical University of Iasi, 700050 Iasi, Romania.
| | - Bertrand Chazallon
- Université de Lille, CNRS, UMR 8523-PhLAM-Physique des Lasers, Atomes et Molécules, CERLA-Centre d'Etudes et de Recherches Lasers et Applications, Lille F-59000, France.
| | - Cristian Focsa
- Université de Lille, CNRS, UMR 8523-PhLAM-Physique des Lasers, Atomes et Molécules, CERLA-Centre d'Etudes et de Recherches Lasers et Applications, Lille F-59000, France.
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27
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Deodhar A, Gensler LS, Sieper J, Clark M, Calderon C, Wang Y, Zhou Y, Leu JH, Campbell K, Sweet K, Harrison DD, Hsia EC, Heijde D, Ariel F, Asnal CA, Berman A, Citera G, Rodriguez G, Savio VG, Bird P, Griffiths H, Nicholls D, Rischmueller M, Zochling J, De Vlam K, Malaise M, Toukap AN, Van den Bosch F, Vanhoof J, Bonfiglioli R, Keiserman M, Scotton AS, Xavier R, Ximenes AC, Atanasov A, Goranov I, Kazmin I, Licheva RN, Nikolov N, Oparanov B, Stoilov R, Bessette L, Rodrigues J, Bortilik L, Dokoupilova E, Dvoarak Z, Galatikova D, Nemec P, Podrazilova L, Simkova G, Stejfova Z, Moravcova R, Vitek P, Cantagrel A, Baillet A, Banneville B, Combe B, Breban M, Nguyen M, Goupille P, Braun J, Everding A, Kekow J, Koenig R, Rubbert‐Roth A, Witte T, Bartha A, Drescher E, Kerekes K, Kovacs A, Pulai J, Rojkovich B, Szanto S, Toth E, Avila H, Torre IG, Irazoque F, Maradiaga M, Pacheco C, Brzosko M, Dudek A, Jeka S, Krogulec M, Kwiatkowska B, Wiland P, Wojciechowski R, Zielinska A, Santos H, Bugrova O, Christyakov V, Gorbunov V, Ilivanova E, Zemerova E, Kamalova R, Kameneva T, Macievskaya G, Marusenko I, Maslyansky A, Myasoedova S, Myasoutova L, Nemtsov B, Nesmeyanova O, Plaksina T, Pokrovskaya T, Polyakova S, Rebrov A, Savina L, Smakotina S, Stanislav M, Ukhanova O, Vinogradova I, Zonova E, Baek HJ, Kim T, Lee C, Lee S, Lee S, Lee S, Park S, Song Y, Suh C, Ramos JA, Blanco FJ, Collantes E, Diaz MC, Vivar MLG, Gratacos J, Juanola X, Chen D, Chen H, Chen K, Chen Y, Chiu Y, Luo S, Tsai S, Tseng J, Wei C, Weng M, Abrahamovych O, Reshotko D, Golovchenko O, Hospodarsky I, Iaremenko O, Levchenko O, Dudnyk O, Garmish O, Grishyna O, Protsenko G, Rekalov D, Smiyan S, Stanislavchuk M, Trypilka S, Tseluyko V, Turianytsia S, Vasylets V, Virstyuk N, Kleban Y, Ciurtin C, Gaffney K, Gunasekera W, Mackay K, Packham J, Sengupta R, Tahir H, Aelion J, Bennett R, Deodhar A, Gonzalez‐Paoli J, Griffin RM, Grisanti M, Mallepalli J, Peters E, Schechtman J, Singhal A. Three Multicenter, Randomized, Double‐Blind, Placebo‐Controlled Studies Evaluating the Efficacy and Safety of Ustekinumab in Axial Spondyloarthritis. Arthritis Rheumatol 2018; 71:258-270. [DOI: 10.1002/art.40728] [Citation(s) in RCA: 173] [Impact Index Per Article: 28.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 09/13/2018] [Indexed: 12/12/2022]
Affiliation(s)
| | | | | | - Michael Clark
- Janssen Research & Development, LLC Spring House Pennsylvania
| | - Cesar Calderon
- Janssen Research & Development, LLC Spring House Pennsylvania
| | - Yuhua Wang
- Janssen Research & Development, LLC Spring House Pennsylvania
| | - Yiying Zhou
- Janssen Research & Development, LLC Spring House Pennsylvania
| | - Jocelyn H. Leu
- Janssen Research & Development, LLC Spring House Pennsylvania
| | - Kim Campbell
- Janssen Research & Development, LLC Spring House Pennsylvania
| | - Kristen Sweet
- Janssen Research & Development, LLC Spring House Pennsylvania
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Mandal D, Yadav RK, Mondal A, Bera SK, Aswin JR, Nemec P, Halenkovic T, Adarsh KV. Intensity mediated change in the sign of ultrafast third-order nonlinear optical response in As 2S 2 thin films. Opt Lett 2018; 43:4787-4790. [PMID: 30272740 DOI: 10.1364/ol.43.004787] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Accepted: 08/30/2018] [Indexed: 06/08/2023]
Abstract
We study experimentally and theoretically the intensity-dependent off-resonant ultrafast third-order nonlinear optical response of As2S2 thin films. At low intensity, we observed saturable absorption with a negative (self-defocusing) nonlinear refractive index (n2) which at higher intensity switched over to reverse saturable absorption with a change in the sign of n2 to positive (self-focusing). Our findings constitute compelling evidence on how to dynamically tune the optical response with the intensity that has its origin in the combined effect of two-photon absorption and Pauli blocking. The results were explained with the help of time-resolved measurements and rigorous theoretical and numerical simulations.
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29
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Fila P, Malik P, Pokorna O, Nemec P. Mitral bioprosthetic valve leaflet fusion treated by balloon valvuloplasty in patients on ECMO. J Card Surg 2018; 33:759-761. [DOI: 10.1111/jocs.13821] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Petr Fila
- Centre of Cardiovascular Surgery and Transplantation; Brno Czech Republic
- Faculty of Medicine; Masaryk University; Brno Czech Republic
| | - Petr Malik
- Centre of Cardiovascular Surgery and Transplantation; Brno Czech Republic
| | - Olga Pokorna
- Centre of Cardiovascular Surgery and Transplantation; Brno Czech Republic
| | - Petr Nemec
- Centre of Cardiovascular Surgery and Transplantation; Brno Czech Republic
- Faculty of Medicine; Masaryk University; Brno Czech Republic
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30
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Simek M, Chudoba A, Hajek R, Tobbia P, Molitor M, Nemec P. From open packing to negative wound pressure therapy: A critical overview of deep sternal wound infection treatment strategies after cardiac surgery. Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub 2018; 162:263-271. [PMID: 30215435 DOI: 10.5507/bp.2018.053] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Deep sternal wound infection is a challenging aspect of modern cardiac surgery. The considerable mortality rate, devastating morbidity and, negative impact on long-term survival has driven cardiac and plastic surgeons to seek a more advantageous treatment solution. This review summarizes progress in the field of deep sternal wound infection treatment after cardiac surgery. Emphasis is placed on outcomes analysis of contemporary treatment strategy based on negative pressure wound therapy followed by sternotomy wound reconstruction, and its comparison with conventional treatment modalities used afore. Furthermore, complications and drawbacks of treatment strategies are critically evaluated to outline current options for successfully managing this life-threatening complication following cardiac surgery.
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Affiliation(s)
- Martin Simek
- Department of Cardiac Surgery, University Hospital Olomouc, Czech Republic
- Faculty of Medicine and Dentistry, Palacky University Olomouc, Czech Republic
| | - Adam Chudoba
- Faculty of Medicine and Dentistry, Palacky University Olomouc, Czech Republic
| | - Roman Hajek
- Department of Cardiac Surgery, University Hospital Olomouc, Czech Republic
| | - Patrick Tobbia
- Department of Cardiovascular Medicine, Regional Medical Center, 624 Hospital Drive, Mountain Home, United States
| | - Martin Molitor
- Department of Plastic Surgery, Hospital Na Bulovce, Prague, Czech Republic
| | - Petr Nemec
- Centre for Cardiovascular and Transplant Surgery, Brno, Czech Republic
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31
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Novak J, Machackova T, Kafunkova T, Mlejnek D, Godava J, Hude P, Zampachova V, Oppelt J, Nemec P, Bedanova H, Slaby O, Bienertova Vasku J, Krejci J, Spinarova L. P2808Plasmatic levels of several microRNAs are altered during acute cellular rejection in patients after heart transplantation. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p2808] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- J Novak
- Masaryk University, Department of Pathological Physiology, Brno, Czech Republic
| | - T Machackova
- Masaryk University, Central European Institute of Technology, Brno, Czech Republic
| | - T Kafunkova
- St. Anne's University Hospital, Department of Cardiovascular Diseases, Brno, Czech Republic
| | - D Mlejnek
- St. Anne's University Hospital, Department of Cardiovascular Diseases, Brno, Czech Republic
| | - J Godava
- St. Anne's University Hospital, Department of Cardiovascular Diseases, Brno, Czech Republic
| | - P Hude
- St. Anne's University Hospital, Department of Cardiovascular Diseases, Brno, Czech Republic
| | - V Zampachova
- St. Anne's University Hospital, Department of Pathology, Brno, Czech Republic
| | - J Oppelt
- Masaryk University, Central European Institute of Technology, Brno, Czech Republic
| | - P Nemec
- Centre of Cardiovascular Surgery and Organ Transplantation, Brno, Czech Republic
| | - H Bedanova
- Centre of Cardiovascular Surgery and Organ Transplantation, Brno, Czech Republic
| | - O Slaby
- Masaryk University, Central European Institute of Technology, Brno, Czech Republic
| | - J Bienertova Vasku
- Masaryk University, Department of Pathological Physiology, Brno, Czech Republic
| | - J Krejci
- St. Anne's University Hospital, Department of Cardiovascular Diseases, Brno, Czech Republic
| | - L Spinarova
- St. Anne's University Hospital, Department of Cardiovascular Diseases, Brno, Czech Republic
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Pesl M, Jelinkova S, Caluori G, Holicka M, Zampachova V, Nemec P, Dvorak P, Rotrekl V. P139Human cardiac progenitor analysis in dystriophin cardiomyopathy after cardiac transplantation. Cardiovasc Res 2018. [DOI: 10.1093/cvr/cvy060.101] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- M Pesl
- St. Anne's University Hospital, Center of Biomolecular and Cellular Engineering and dep. of Cardiovascular diseases, Brno, Czech Republic
| | - S Jelinkova
- Masaryk University, Biology dep., Faculty of Medicine, Brno, Czech Republic
| | - G Caluori
- St. Anne's University Hospital, ICRC and CEITEC, Masaryk University,, Brno, Czech Republic
| | - M Holicka
- Masaryk University, Department of Cardiology, University hospital Brno and Faculty of Medicine, Brno, Czech Republic
| | - V Zampachova
- Masaryk University, St. Anne's University Hospital, Ist Department of Pathology, Faculty of Medicine, Brno, Czech Republic
| | - P Nemec
- Center for Cardiovascular Surgery and Transplantation, Brno, Czech Republic
| | - P Dvorak
- Masaryk University, Biology dep., Faculty of Medicine, Brno, Czech Republic
| | - V Rotrekl
- Masaryk University, Biology dep., Faculty of Medicine, Brno, Czech Republic
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Kotaskova I, Nemec P, Vanerkova M, Malisova B, Tejkalova R, Orban M, Zampachova V, Freiberger T. First report of Sneathia sanguinegens together with Mycoplasma hominis in postpartum prosthetic valve infective endocarditis: a case report. BMC Infect Dis 2017; 17:563. [PMID: 28806998 PMCID: PMC5557263 DOI: 10.1186/s12879-017-2654-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [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: 04/19/2017] [Accepted: 07/30/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The presence of more than one bacterial agent is relatively rare in infective endocarditis, although more common in prosthetic cases. Molecular diagnosis from a removed heart tissue is considered a quick and effective way to diagnose fastidious or intracellular agents. CASE PRESENTATION Here we describe the case of postpartum polymicrobial prosthetic valve endocarditis in a young woman. Sneathia sanguinegens and Mycoplasma hominis were simultaneously detected from the heart valve sample using broad range 16S rRNA polymerase chain reaction (PCR) followed by sequencing while culture remained negative. Results were confirmed by independent PCR combined with denaturing gradient gel electrophoresis. Before the final agent identification, the highly non-compliant patient left from the hospital against medical advice on empirical intravenous treatment with aminopenicillins, clavulanate and gentamicin switched to oral amoxycillin and clavulanate. Four months after surgery, no signs of inflammation were present despite new regurgitation and valve leaflet flail was detected. However, after another 5 months the patient died from sepsis and recurrent infective endocarditis of unclarified etiology. CONCLUSIONS Mycoplasma hominis is a rare causative agent of infective endocarditis. To the best of our knowledge, presented case is the first report of Sneathia sanguinegens detected in this condition. Molecular techniques were shown to be useful even in polymicrobial infective endocarditis samples.
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Affiliation(s)
- Iva Kotaskova
- Molecular and Genetics Laboratory, Centre for Cardiovascular Surgery and Transplantation, Brno, Czech Republic.,Medical Genomics Research Group, CEITEC, Masaryk University, Brno, Czech Republic
| | - Petr Nemec
- Department of Cardiosurgery, Centre for Cardiovascular Surgery and Transplantation, Brno, Czech Republic
| | - Martina Vanerkova
- Molecular and Genetics Laboratory, Centre for Cardiovascular Surgery and Transplantation, Brno, Czech Republic
| | - Barbora Malisova
- Molecular and Genetics Laboratory, Centre for Cardiovascular Surgery and Transplantation, Brno, Czech Republic
| | - Renata Tejkalova
- Department of Microbiology, Faculty of Medicine, Masaryk University and St. Anne's University Hospital, Brno, Czech Republic
| | - Marek Orban
- Department of Cardiology, Centre for Cardiovascular Surgery and Transplantation, Brno, Czech Republic
| | - Vita Zampachova
- 1st Institute of Pathological Anatomy, Faculty of Medicine, Masaryk University and St. Anne's University Hospital, Brno, Czech Republic
| | - Tomas Freiberger
- Molecular and Genetics Laboratory, Centre for Cardiovascular Surgery and Transplantation, Brno, Czech Republic. .,Medical Genomics Research Group, CEITEC, Masaryk University, Brno, Czech Republic. .,Department of Clinical Immunology and Allergology, Faculty of Medicine, Masaryk University, Brno, Czech Republic.
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Novak J, Machackova T, Sana J, Kafunkova T, Godava J, Hude P, Zampachova V, Nemec P, Bedanova H, Slaby O, Bienertova-Vasku J, Krejci J, Spinarova L. P6030Levels of various microRNAs are altered in endomyocardial biopsies during acute cellular rejection in patients after heart transplantation. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p6030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Bedanova H, Fila P, Horvath V, Sebo M, Podrouzkova H, Orban M, Nemec P. Association between the heart rate early after heart transplantation and the long term clinical outcomes. ACTA ACUST UNITED AC 2017; 118:366-369. [PMID: 28664747 DOI: 10.4149/bll_2017_069] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND A strong correlation between a lower heart rate and survival has been demonstrated in various patient populations. The optimal heart rate for heart transplant patients is still unknown. The aim of our study was to evaluate the association between an early heart rate and survival after heart transplantation. MATERIAL AND METHODS We retrospectively analysed a group of 330 patients, who underwent heart transplantation in our institution from 1994 to 2014 and complete datasets, including 24-hour heart rate monitoring one month after the heart transplantation. Patients were divided in 2 groups: Group A (n = 278) with the average 24-hour heart rate <90 bpm, and Group B (n = 52) with ≥ 90 bpm. RESULTS The average period of monitoring was 7.5 ± 5.3 years. No differences in baseline characteristics were observed in both groups of recipients and respective donors. One-year survival in groups A and B was 92 % and 81 %, respectively; 5-year survival was 79 % and 60 %, respectively; and 10-year survival was 66 % and 50 %, respectively (p = 0.001). CONCLUSION Increased heart rate in the early post-transplant period was significantly associated with a poorer survival rate in patients after heart transplantation (Tab. 2, Fig. 1, Ref. 25).
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Rehak Z, Sprlakova-Pukova A, Kazda T, Fojtik Z, Vargova L, Nemec P. 18F-FDG PET/CT in polymyalgia rheumatica-a pictorial review. Br J Radiol 2017; 90:20170198. [PMID: 28508663 DOI: 10.1259/bjr.20170198] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Polymyalgia rheumatica (PMR) is one of the inflammatory rheumatic diseases that can potentially be detected by positron emission tomography/CT. High fluorine-18 fludeoxyglucose (18F-FDG) accumulation around the shoulders, sternoclavicular and hip joints are the most common pre-treatment features of patients with PMR. Another common sign is increased 18F-FDG uptake in extra-articular regions between columnal spinous processes, near ischial tuberosities and in the praepubic area. Some patients also present with high 18F-FDG uptake in main arteries, corresponding to the characteristics of giant cell arteritis. It is possible to observe a decrease or even a disappearance of 18F-FDG uptake after effective therapy, an event which may be useful for the monitoring of treatment as well as for detection of PMR relapse.
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Affiliation(s)
- Zdenek Rehak
- 1 Department of Nuclear Medicine and PET Center, Masaryk Memorial Cancer Institute, Brno, Czech Republic.,2 Regional Center for Applied Molecular Oncology (RECAMO), Masaryk Memorial Cancer Institute, Brno, Czech Republic.,Department of Comprehensive Cancer Care, Masaryk Memorial Cancer Institute and Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Andrea Sprlakova-Pukova
- 4 Department of Radiology and Nuclear Medicine, University Hospital Brno and Masaryk University , Brno, Czech Republic
| | - Tomas Kazda
- 5 Department of Radiation Oncology, Masaryk Memorial Cancer Institute and Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Zdenek Fojtik
- 6 Rheumatology Unit, Department of Internal Medicine-Hematology and Oncology, University Hospital Brno and Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Lenka Vargova
- 7 Department of Anatomy, University Hospital Brno and Masaryk University, Brno, Czech Republic
| | - Petr Nemec
- 8 Rheumatology Unit, 2nd Department of Internal Medicine, St Anne's University Hospital Brno and Masaryk University, Brno, Czech Republic
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Rehak Z, Sprlakova-Pukova A, Bortlicek Z, Fojtik Z, Kazda T, Joukal M, Koukalova R, Vasina J, Eremiasova J, Nemec P. PET/CT imaging in polymyalgia rheumatica: praepubic 18F-FDG uptake correlates with pectineus and adductor longus muscles enthesitis and with tenosynovitis. Radiol Oncol 2017; 51:8-14. [PMID: 28265227 PMCID: PMC5330169 DOI: 10.1515/raon-2017-0001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [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: 08/29/2016] [Accepted: 12/14/2016] [Indexed: 01/08/2023] Open
Abstract
Background The role of 18F-fluorodeoxyglucose positron emission computed tomography (18F-FDG PET/CT) is increasing in the diagnosis of polymyalgia rheumatica (PMR), one of the most common inflammatory rheumatic diseases. In addition to other locations, increased 18F-FDG accumulation has been detected in the praepubic region in some patients. However, a deeper description and pathophysiological explanation of this increased praepubic accumulation has been lacking. The aim of the presented study is to confirm a decrease in praepubic 18F-FDG accumulation in response to therapy and to describe potential correlations to other 18F-FDG PET/CT scan characteristics during the course of disease. As a secondary objective, we describe the pathological aspects of the observed praepubic 18F-FDG uptake. Patients and methods A retrospective review of patients with newly suspected PMR undergoing baseline and follow up 18F-FDG PET/CT between February 2010 and March 2016 is given. Those with a visually detected presence of praepubic 18F-FDG accumulation were further analysed. The uptake was assessed visually and also semi-quantitatively in the defined region of interest by calculation of target-to-liver ratios. Other regions typical for PMR were systematically described as well (shoulders, hips, sternoclavicular joints, ischiogluteal bursae, spinous interspaces). Results Twenty-three out of 89 screened patients (26%) presented with initial praepubic 18F-FDG PET/CT positivity, 15 of whom also underwent follow up 18F-FDG PET/CT examination. Five out of 15 patients presented with increased 18F-FDG accumulation in large arteries as a sign of giant cell arteritis. During follow up examination, decrease in 18F-FDG accumulation caused by therapeutic intervention was observed in all evaluated locations in all analysed patients and no new positivity was indicated, including periarticular, extraarticular tissues or target large vessels. Praepubical accumulation of 18F-FDG was diminished in all patients (15/15, 100%) after treatment with steroids. Conclusions Increased praepubic 18F-FDG uptake in patients with PMR is relatively common and this region should be systematically evaluated during differential diagnosis of rheumatic and malignant disease. Praepubic inflammation is probably related to enthesitis and tenosynovitis at the origin of pectineus and adductor longus muscles ventrally from the pubis.
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Affiliation(s)
- Zdenek Rehak
- Department of Nuclear Medicine and PET Center, Masaryk Memorial Cancer Institute, Brno, Czech Republic; Regional Center for Applied Molecular Oncology (RECAMO), Masaryk Memorial Cancer Institute, Brno, Czech Republic; Department of Comprehensive Cancer Care, Masaryk Memorial Cancer Institute and Faculty of Medicine, Brno, Czech Republic
| | - Andrea Sprlakova-Pukova
- Department of Radiology, University Hospital Brno and Masaryk University, Brno, Czech Republic
| | - Zbynek Bortlicek
- Institute of Biostatistics and Analyses, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Zdenek Fojtik
- Rheumatology Unit, Department of Internal Medicine - Hematology and Oncology, University Hospital Brno and Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Tomas Kazda
- Department of Radiation Oncology, Masaryk Memorial Cancer Institute and Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Marek Joukal
- Department of Anatomy, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Renata Koukalova
- Department of Nuclear Medicine and PET Center, Masaryk Memorial Cancer Institute, Brno, Czech Republic
| | - Jiri Vasina
- Department of Nuclear Medicine and PET Center, Masaryk Memorial Cancer Institute, Brno, Czech Republic
| | - Jana Eremiasova
- Department of Nuclear Medicine and PET Center, Masaryk Memorial Cancer Institute, Brno, Czech Republic
| | - Petr Nemec
- Rheumatology Unit, 2nd Department of Internal Medicine, St. Anne's University Hospital Brno and Masaryk University, Brno, Czech Republic
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Mach L, Bedanova H, Soucek M, Karpisek M, Konecny T, Nemec P, Orban M. Impact of cardiopulmonary bypass surgery on cytokines in epicardial adipose tissue: comparison with subcutaneous fat. Perfusion 2016; 32:279-284. [PMID: 28155592 DOI: 10.1177/0267659116683791] [Citation(s) in RCA: 8] [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] [Indexed: 01/05/2023]
Abstract
BACKGROUND Cardiac surgery and cardiopulmonary bypass (CPB) have been shown to stimulate a systemic inflammatory response which has been associated with adverse postoperative outcomes. Adipose tissue, both epicardial (EAT) and subcutaneous (SAT), is a known source of inflammatory cytokines, but its role in the pathophysiology of surgery- and CPB-induced systemic inflammatory response has not been fully elucidated. Therefore, we conducted a study to establish levels of selected cytokines in EAT and SAT prior to and after surgery with CPB. METHODS Adipose tissue samples were obtained from patients undergoing planned cardiac surgery on CPB. Samples from EAT and SAT were collected before and immediately after CPB. Levels of tumour necrosis factor-α (TNF-α), interleukin-6 (IL-6), adipocyte fatty acid-binding protein (AFABP), leptin and adiponectin were determined by ELISA, which were adjusted for a total concentration of proteins in the individual samples. RESULTS Samples from 77 patients (mean age 67.68 ± 11.5 years) were obtained and analysed. Leptin, adiponectin, TNF-α and AFABP were shown to decrease their concentrations statistically significantly in the EAT after CPB while no statistically significant drop was observed in the SAT. On the contrary, IL-6 showed only a slight and statistically insignificant decrease in the EAT after CPB and it was in the SAT where a statistically significant drop was observed. DISCUSSION One of the most relevant findings of this study was the marked decrease in EAT levels of TNF-α, AFABP, leptin and adiponectin after the CPB termination. Our results suggest that EAT might serve as a pool of cytokines which are released into the circulation in reaction to surgery with CPB. Should these novel findings be confirmed, new strategies to assess and possibly reduce EAT contribution on adverse outcomes of cardiac surgery may be developed.
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Affiliation(s)
- Lukas Mach
- 1 University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom.,2 International Clinical Research Centre, St. Anne's University Hospital Brno, Brno, Czech Republic
| | - Helena Bedanova
- 3 Centre of Cardiovascular Surgery and Organ Transplantation Brno, Brno, Czech Republic
| | - Miroslav Soucek
- 2 International Clinical Research Centre, St. Anne's University Hospital Brno, Brno, Czech Republic
| | - Michal Karpisek
- 4 Department of Human Pharmacology and Toxicology, Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic
| | - Tomas Konecny
- 5 Keck Medical Centre of the University of Southern California, Los Angeles, CA, USA
| | - Petr Nemec
- 2 International Clinical Research Centre, St. Anne's University Hospital Brno, Brno, Czech Republic.,3 Centre of Cardiovascular Surgery and Organ Transplantation Brno, Brno, Czech Republic
| | - Marek Orban
- 3 Centre of Cardiovascular Surgery and Organ Transplantation Brno, Brno, Czech Republic.,4 Department of Human Pharmacology and Toxicology, Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic
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Rehak Z, Vasina J, Ptacek J, Kazda T, Fojtik Z, Nemec P. PET/CT in giant cell arteritis: High 18F-FDG uptake in the temporal, occipital and vertebral arteries. Rev Esp Med Nucl Imagen Mol 2016; 35:398-401. [PMID: 27177856 DOI: 10.1016/j.remn.2016.03.007] [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: 02/10/2016] [Revised: 03/14/2016] [Accepted: 03/24/2016] [Indexed: 11/17/2022]
Abstract
18F-FDG PET/CT imaging is useful in patients with fever of unknown origin and can detect giant cell arteritis in extracranial large arteries. However, it is usually assumed that temporal arteries cannot be visualized with a PET/CT scanner due to their small diameter. Three patients with clinical symptoms of temporal arteritis were examined using a standard whole body PET/CT protocol (skull base - mid thighs) followed by a head PET/CT scan using the brain protocol. High 18F-FDG uptake in the aorta and some arterial branches were detected in all 3 patients with the whole body protocol. Using the brain protocol, head imaging led to detection of high 18F-FDG uptake in temporal arteries as well as in their branches (3 patients), in occipital arteries (2 patients) and also in vertebral arteries (3 patients).
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Affiliation(s)
- Z Rehak
- Department of Nuclear Medicine and PET Center, Masaryk Memorial Cancer Institute and Faculty of Medicine, Masaryk University, Brno, Czech Republic; Regional Center for Applied Molecular Oncology (RECAMO), Masaryk Memorial Cancer Institute, Brno, Czech Republic; Department of Comprehensive Cancer Care, Masaryk Memorial Cancer Institute and Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - J Vasina
- Department of Nuclear Medicine and PET Center, Masaryk Memorial Cancer Institute and Faculty of Medicine, Masaryk University, Brno, Czech Republic; Center of Molecular Imaging, International Clinical Research Center (ICRC), St. Anne's University Hospital, Brno, Czech Republic
| | - J Ptacek
- Department of Nuclear Medicine and Department of Medical Physics and Radiation Protection, University Hospital, Olomouc, Czech Republic
| | - T Kazda
- Department of Radiation Oncology, Masaryk Memorial Cancer Institute and Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Z Fojtik
- Rheumatology Unit, Department of Internal Medicine - Hematology and Oncology, University Hospital Brno and Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - P Nemec
- Rheumatology Unit, 2nd Department of Internal Medicine, St. Anne's University Hospital Brno and Faculty of Medicine, Masaryk University, Brno, Czech Republic.
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Rehak Z, Vasina J, Ptacek J, Kazda T, Fojtik Z, Nemec P. PET/CT in giant cell arteritis: High 18F-FDG uptake in the temporal, occipital and vertebral arteries. Rev Esp Med Nucl Imagen Mol 2016. [DOI: 10.1016/j.remnie.2016.03.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Mach L, Bedanova H, Soucek M, Karpisek M, Nemec P, Orban M. Tobacco smoking and cytokine levels in human epicardial adipose tissue: Impact of smoking cessation. Atherosclerosis 2016; 255:37-42. [PMID: 27816807 DOI: 10.1016/j.atherosclerosis.2016.10.022] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [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: 06/08/2016] [Revised: 08/28/2016] [Accepted: 10/12/2016] [Indexed: 10/20/2022]
Abstract
BACKGROUND & AIMS Epicardial adipose tissue (EAT) is a source of a number of cytokines which could act in the pathogenesis of coronary artery disease (CAD). The potential relationship between known cardiovascular risk factors, such as smoking, dyslipidaemia or diabetes mellitus and EAT humoral signalling, has not been fully elucidated. Therefore, we designed and conducted a cross-sectional study to determine whether selected cardiovascular risk factors are linked to levels of cytokines in epicardial and subcutaneous adipose tissue (SAT). METHODS Samples of SAT and EAT were collected from consecutive patients undergoing scheduled cardiac surgery. Tissue concentrations of tumour necrosis factor-ɑ (TNF-α), interleukin-6 (IL-6), adipocyte fatty acid-binding protein, leptin, and adiponectin were determined by ELISA. RESULTS We enrolled 140 patients. TNF-α and IL-6 concentrations in EAT and SAT were significantly higher in current smokers (CS) than in never smokers (NS) and former smokers (FS). There were no differences between FS and NS. No other clinical variables were associated with cytokine concentrations in a regression analysis. CONCLUSIONS Smoking was independently associated with higher TNF-α and IL-6 concentrations in EAT and SAT. A novel observation that pro-inflammatory cytokines are elevated in EAT in smokers could contribute to identify potential mechanisms involved in the pathogenesis of adverse effects of tobacco smoking. There were no differences between EAT cytokine production in NS and FS, which support the importance of smoking cessation for cardiovascular risk reduction.
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Affiliation(s)
- Lukas Mach
- International Clinical Research Centre, St. Anne's University Hospital Brno, Pekarska 53, Brno, 602 00, Czech Republic; University Hospital Southampton NHS Foundation Trust, Tremona Road, Southampton, SO15 6YD, United Kingdom
| | - Helena Bedanova
- International Clinical Research Centre, St. Anne's University Hospital Brno, Pekarska 53, Brno, 602 00, Czech Republic; Centre of Cardiovascular Surgery and Organ Transplantation Brno, Pekarska 53, Brno, 602 00, Czech Republic
| | - Miroslav Soucek
- International Clinical Research Centre, St. Anne's University Hospital Brno, Pekarska 53, Brno, 602 00, Czech Republic
| | - Michal Karpisek
- Department of Human Pharmacology and Toxicology, Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences, Palackeho tr. 1, Brno, 612 42, Czech Republic
| | - Petr Nemec
- International Clinical Research Centre, St. Anne's University Hospital Brno, Pekarska 53, Brno, 602 00, Czech Republic; Centre of Cardiovascular Surgery and Organ Transplantation Brno, Pekarska 53, Brno, 602 00, Czech Republic
| | - Marek Orban
- International Clinical Research Centre, St. Anne's University Hospital Brno, Pekarska 53, Brno, 602 00, Czech Republic; Centre of Cardiovascular Surgery and Organ Transplantation Brno, Pekarska 53, Brno, 602 00, Czech Republic; Department of Human Pharmacology and Toxicology, Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences, Palackeho tr. 1, Brno, 612 42, Czech Republic.
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Orban M, Mach L, Bedanova H, Soucek M, Konecny T, Nemec P. Association Between Tobacco Smoking and Pro-Inflammatory Humoral Profile in Human Epicardial Adipose Tissue: Impact of Smoking Cessation on Cytokine Levels. Chest 2016. [DOI: 10.1016/j.chest.2016.08.1419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Wagner R, Piler P, Uchytil B, Halouzka R, Kovaru H, Bobkova M, Nemec P. Systemic inflammatory response syndrome is reduced by preoperative plasma-thrombo-leukocyte aphaeresis in a pig model of cardiopulmonary bypass. Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub 2016; 160:399-406. [DOI: 10.5507/bp.2016.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Accepted: 03/01/2016] [Indexed: 02/04/2023] Open
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Nemec P, Sefcik M, Sevcikova J, Prochazkova L, Pavkova-Godbergova M. AB0236 The Role of Vitamin D Receptor in Rheumatoid Arthritis. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.3836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Bedanova H, Orban M, Tretina M, Fila P, Horvath V, Krejci J, Nemec P. Monitoring of allograft vasculopathy by intravascular ultrasound one month and one year after heart transplantation: A single center study. Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub 2016. [DOI: 10.5507/bp.2015.034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Mandl P, Baranauskaite A, Damjanov N, Hojnik M, Kurucz R, Nagy O, Nemec P, Niedermayer D, Perić P, Petranova T, Pille A, Rednic S, Vlad V, Zlnay M, Balint PV. Musculoskeletal ultrasonography in routine rheumatology practice: data from Central and Eastern European countries. Rheumatol Int 2016; 36:845-54. [PMID: 26923691 PMCID: PMC4873522 DOI: 10.1007/s00296-016-3442-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Accepted: 02/10/2016] [Indexed: 12/01/2022]
Abstract
The main aim was to gain structured insight into the use of musculoskeletal ultrasonography (MSUS) in routine rheumatology practices in Central and Eastern European (CEE) countries. In a cross-sectional, observational, international, multicenter survey, a questionnaire was sent to investigational sites in CEE countries. Data on all subsequent routine MSUS examinations, site characteristics, MSUS equipment, and investigators were collected over 6 months or up to 100 examinations per center. A total of 95 physicians at 44 sites in 9 countries provided information on a total of 2810 MSUS examinations. The most frequent diagnoses were rheumatoid arthritis (RA) and spondyloarthritis (34.8 and 14.9 % of cases, respectively). Mean number of joints examined was 6.8. MSUS was most frequently performed for diagnostic purposes (58 %), particularly in patients with undifferentiated arthritis, suspected soft tissue disorders, or osteoarthritis (73.0–85.3 %). In RA patients, 56.3 % of examinations were conducted to monitor disease activity. Nearly all investigations (99 %) had clinical implications, while the results of 78.6 % of examinations (51.6–99.0 %) were deemed useful for patient education. This first standardized multicountry survey performed in CEEs provided a structured documentation of the routine MSUS use in participating countries. The majority of MSUS examinations were performed for diagnostic purposes, whereas one-third was conducted to monitor disease activity in RA. A majority of examinations had an impact on clinical decision making and were also found to be useful for patient education.
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Affiliation(s)
- Peter Mandl
- Division of Rheumatology, 3rd Department of Internal Medicine, Medical University of Vienna, 18-20 Währinger Gürtel, Vienna, Austria. .,3rd Department of Rheumatology, National Institute of Rheumatology and Physiotherapy, Budapest, Hungary.
| | - Asta Baranauskaite
- Department of Rheumatology, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Nemanja Damjanov
- Institute of Rheumatology, University of Belgrade School of Medicine, Belgrade, Serbia
| | - Maja Hojnik
- Global Medical Affairs Rheumatology, AbbVie, Ljubljana, Slovenia
| | - Reka Kurucz
- 3rd Department of Rheumatology, National Institute of Rheumatology and Physiotherapy, Budapest, Hungary
| | | | - Petr Nemec
- Department of Rheumatology, St. Anne's University Hospital, Brno, Czech Republic
| | - Dora Niedermayer
- 3rd Department of Rheumatology, National Institute of Rheumatology and Physiotherapy, Budapest, Hungary
| | - Porin Perić
- Department of Rheumatology, Clinical Hospital Center Zagreb, University of Zagreb, Zagreb, Croatia
| | - Tzvetanka Petranova
- Department of Rheumatology, UMHAT St.Iv.Rilsky, Medical University, Sofia, Bulgaria
| | | | - Simona Rednic
- Department of Rheumatology, Clinical County Emergency Hospital, Cluj-Napoca, Romania
| | - Violeta Vlad
- Department of Rheumatology, Sf. Maria Clinical Hospital, Bucharest, Romania
| | - Martin Zlnay
- Department of Rheumatology, National Institute of Rheumatic Diseases, Piestany, Slovak Republic
| | - Peter V Balint
- 3rd Department of Rheumatology, National Institute of Rheumatology and Physiotherapy, Budapest, Hungary
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Podrouzkova H, Bedanova H, Tretina M, Korinek J, Stepanova R, Hruskova J, Nemec P, Konecny T, Orban M. Decrease in longitudinal strain in heart transplant recipients is associated with rejection. Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub 2015; 159:601-6. [DOI: 10.5507/bp.2015.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Accepted: 04/14/2015] [Indexed: 01/30/2023] Open
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48
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Rehak Z, Vasina J, Nemec P, Fojtik Z, Koukalova R, Bortlicek Z, Rehakova D, Adam J, Vavrusova A, Adam Z. Various forms of 18F-FDG PET and PET/CT findings in patients with polymyalgia rheumatica. Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub 2015; 159:629-36. [DOI: 10.5507/bp.2015.026] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Accepted: 05/12/2015] [Indexed: 11/23/2022] Open
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49
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Wadley P, Hills V, Shahedkhah MR, Edmonds KW, Campion RP, Novák V, Ouladdiaf B, Khalyavin D, Langridge S, Saidl V, Nemec P, Rushforth AW, Gallagher BL, Dhesi SS, Maccherozzi F, Železný J, Jungwirth T. Antiferromagnetic structure in tetragonal CuMnAs thin films. Sci Rep 2015; 5:17079. [PMID: 26602978 PMCID: PMC4658521 DOI: 10.1038/srep17079] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [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] [Received: 07/29/2015] [Accepted: 10/26/2015] [Indexed: 12/03/2022] Open
Abstract
Tetragonal CuMnAs is an antiferromagnetic material with favourable properties for applications in spintronics. Using a combination of neutron diffraction and x-ray magnetic linear dichroism, we determine the spin axis and magnetic structure in tetragonal CuMnAs, and reveal the presence of an interfacial uniaxial magnetic anisotropy. From the temperature-dependence of the neutron diffraction intensities, the Néel temperature is shown to be (480 ± 5) K. Ab initio calculations indicate a weak anisotropy in the (ab) plane for bulk crystals, with a large anisotropy energy barrier between in-plane and perpendicular-to-plane directions.
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Affiliation(s)
- P. Wadley
- School of Physics and Astronomy, University of Nottingham, NG7 2RD, United Kingdom
| | - V. Hills
- School of Physics and Astronomy, University of Nottingham, NG7 2RD, United Kingdom
| | - M. R. Shahedkhah
- School of Physics and Astronomy, University of Nottingham, NG7 2RD, United Kingdom
| | - K. W. Edmonds
- School of Physics and Astronomy, University of Nottingham, NG7 2RD, United Kingdom
| | - R. P. Campion
- School of Physics and Astronomy, University of Nottingham, NG7 2RD, United Kingdom
| | - V. Novák
- Institute of Physics ASCR, v. v. i., Cukrovarnicka 10, 16253 Prague 6, Czech Republic
| | - B. Ouladdiaf
- Institut Laue-Langevin, 6 Rue Jules Horowitz, 38042 Grenoble, France
| | - D. Khalyavin
- ISIS, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Science and Technology Facilities Council, Oxon OX11 0QX, United Kingdom
| | - S. Langridge
- ISIS, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Science and Technology Facilities Council, Oxon OX11 0QX, United Kingdom
| | - V. Saidl
- Faculty of Mathematics and Physics, Charles University in Prague, 121 16 Prague, Czech Republic
| | - P. Nemec
- Faculty of Mathematics and Physics, Charles University in Prague, 121 16 Prague, Czech Republic
| | - A. W. Rushforth
- School of Physics and Astronomy, University of Nottingham, NG7 2RD, United Kingdom
| | - B. L. Gallagher
- School of Physics and Astronomy, University of Nottingham, NG7 2RD, United Kingdom
| | - S. S. Dhesi
- Diamond Light Source, Chilton, Didcot, Oxfordshire OX11 0DE, United Kingdom
| | - F. Maccherozzi
- Diamond Light Source, Chilton, Didcot, Oxfordshire OX11 0DE, United Kingdom
| | - J. Železný
- Institute of Physics ASCR, v. v. i., Cukrovarnicka 10, 16253 Prague 6, Czech Republic
- Faculty of Mathematics and Physics, Charles University in Prague, 121 16 Prague, Czech Republic
| | - T. Jungwirth
- School of Physics and Astronomy, University of Nottingham, NG7 2RD, United Kingdom
- Institute of Physics ASCR, v. v. i., Cukrovarnicka 10, 16253 Prague 6, Czech Republic
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Abstract
Peripartum cardiomyopathy (PPCM) is a relatively rare disease characterized by systolic heart failure occuring towards the end of pregnancy or during the months following birth. It is most often seen in women of African descent, and its incidence seems to be slightly increasing in recent years. Other etiologies of heart failure should be excluded to determine the diagnosis of PPCM. The clinical picture corresponds to systolic heart failure. The rapid onset of the symptoms in relation to pregnancy is striking. The essential diagnostic procedures such as echocardiography, cardiac magnetic resonance imaging and endomyocardial biopsy may be beneficial in certain situations. The etiology of the disease remains unclear. Speculated causes include myocarditis, autoimmune disorders, cardiotropic virus infection, and abnormal responses to hemodynamic and hormonal changes during pregnancy. Particular attention is currently given to the concept of increased oxidative stress inducing production of proapoptotic, angiostatic and proinflammatory mediators. Recovery of left ventricular systolic function occurs in about half of the cases. Mortality has been decreasing in recent years, especially in the United States, but is still between 10-15% in less developed countries where therapeutic possibilities are limited. In addition to standard heart failure therapy, specific treatments (pentoxyfilline, bromocriptine, immunomodulatory therapy) have been tested. Mechanical circulatory support is sometimes needed. Heart transplantation is the therapeutic option for the most severe heart failure and is used in about 10% of the cases. Recurrence in subsequent pregnancy is common and therefore, another pregnancy is not recommended in many cases.
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Affiliation(s)
| | | | - Petr Nemec
- Department of Cardiovascular Diseases, St. Anne's University Hospital - International Clinical Research Center, Pekaska 53, 656 91 Brno, Czech Republic.
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