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Das P, Sayyed A, Bharath S, Shales S, Das M, Pattari S, Narayan P. Impact of distension pressure on saphenous vein endothelial injury in coronary artery bypass grafting. Indian J Thorac Cardiovasc Surg 2024; 40:424-432. [PMID: 38919177 PMCID: PMC11194250 DOI: 10.1007/s12055-024-01731-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 03/23/2024] [Accepted: 03/25/2024] [Indexed: 06/27/2024] Open
Abstract
Introduction Long saphenous vein grafts (LSVGs) are pivotal conduits in coronary artery bypass grafting (CABG), yet concerns persist regarding early failure and long-term patency. Endothelial damage, a potent initiator of graft failure, necessitates exploration of factors contributing to endothelial injury during LSVG preparation. Methods A prospective, single-center study was conducted, assessing the impact of unregulated distension pressure on LSVG endothelium during CABG. Histological and CD31 (cluster of differentiation 31) immunohistochemical analyses were performed on 21 paired vein samples, categorized into non-distended (group A) and distended (group B) groups. Pressure recordings were obtained using different syringe sizes during vein distension. Results Histological examination revealed a significantly higher percentage of endothelial cell loss in distended veins (31.95% ± 31.31) compared to non-distended veins (11.67% ± 28.65) (p = 0.034). CD31 immunohistochemistry corroborated greater endothelial cell loss in distended veins (p = 0.001). The pressure recordings with a 20-cc syringe, as opposed to using a 10-cc syringe, were considerably lower (44.5 mmHg vs. 92.75 mmHg) emphasizing the inverse relationship between syringe size and pressure generated. In our study, pre-existing endothelial injury was observed in one-third of diabetic patients (36%), with all instances of such injury exclusively identified in individuals with diabetes. Conclusion Unregulated distension pressure during LSVG preparation is associated with greater endothelial damage, as evidenced by histological and immunohistochemical analyses. The inverse relationship between syringe size and pressure underscores the importance of controlled distension.
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Affiliation(s)
- Patralekha Das
- NH Rabindranath Tagore International Institute of Cardiac Sciences, Narayana Health, 124, EM Bypass, Mukundapur, Kolkata, 700099 India
| | - Azhar Sayyed
- NH Rabindranath Tagore International Institute of Cardiac Sciences, Narayana Health, 124, EM Bypass, Mukundapur, Kolkata, 700099 India
| | - Sundar Bharath
- NH Rabindranath Tagore International Institute of Cardiac Sciences, Narayana Health, 124, EM Bypass, Mukundapur, Kolkata, 700099 India
| | - Sufina Shales
- NH Rabindranath Tagore International Institute of Cardiac Sciences, Narayana Health, 124, EM Bypass, Mukundapur, Kolkata, 700099 India
| | - Mrinalendu Das
- NH Rabindranath Tagore International Institute of Cardiac Sciences, Narayana Health, 124, EM Bypass, Mukundapur, Kolkata, 700099 India
| | - Sanjib Pattari
- NH Rabindranath Tagore International Institute of Cardiac Sciences, Narayana Health, 124, EM Bypass, Mukundapur, Kolkata, 700099 India
| | - Pradeep Narayan
- NH Rabindranath Tagore International Institute of Cardiac Sciences, Narayana Health, 124, EM Bypass, Mukundapur, Kolkata, 700099 India
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Deng MX, Lee GS, Vervoort D, Fremes SE. No-touch saphenous vein: current understanding of the conduit 'less handled'. Curr Opin Cardiol 2024:00001573-990000000-00149. [PMID: 38606620 DOI: 10.1097/hco.0000000000001149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/13/2024]
Abstract
PURPOSE OF REVIEW The no-touch technique is an established method to harvest the saphenous vein (NT-SV), which is the most commonly used conduit in coronary artery bypass grafting. Herein, we summarize the foundational evidence, as well as highlight recent innovations and ongoing clinical trials involving NT-SV. RECENT FINDINGS Through preservation of perivascular tissue for atraumatic handling and omission of manual distension, the NT-SV maintains endothelial nitrous oxide synthase levels and experiences less vascular smooth muscle cell activation, which translates to slower progression of atherosclerosis and less size mismatch of the graft and target vessel. These biomolecular advantages allow NT-SV to provide superior graft patency compared to conventional skeletonized saphenous vein and approximating that of the radial artery. Nonetheless, the clinical benefits of NT-SV for mortality and reduction in major adverse cardiac and cerebrovascular events are insufficiently studied in the long-term. The drawback of NT-SV is the short-term harvest site complications, which may potentially be addressed by the advent of endoscopic no-touch technique. SUMMARY NT-SV is a promising conduit, and its role will be further clarified in upcoming clinical trials and as follow-up lengthens. However, conduit selection and harvest technique should ultimately be personalized to the individual patient.
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Affiliation(s)
| | | | - Dominique Vervoort
- Division of Cardiac Surgery
- Institute of Health Policy, Management and Evaluation, University of Toronto
| | - Stephen E Fremes
- Division of Cardiac Surgery
- Temerty Faculty of Medicine
- Institute of Health Policy, Management and Evaluation, University of Toronto
- Schulich Heart Centre, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
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Nakamura R, Honda K, Kunimoto H, Fujimoto T, Agematsu K, Nishimura Y. Impact of Graft Velocity on Saphenous Vein Graft Atherosclerosis after Coronary Artery Bypass Grafting. Ann Thorac Cardiovasc Surg 2024; 30:23-00066. [PMID: 37468261 PMCID: PMC10902658 DOI: 10.5761/atcs.oa.23-00066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Accepted: 06/23/2023] [Indexed: 07/21/2023] Open
Abstract
PURPOSE Saphenous vein grafts (SVGs) sometimes occur as vein graft stenosis or failure in coronary artery bypass grafting. The purpose of this study was to detect the factors affecting vein graft atherosclerosis. METHODS We performed two analysis. In the first analysis, we enrolled 120 grafts using conventionally harvested saphenous vein graft (C-SVG) and followed-up with multiple coronary computed tomography angiography (CCTA). We examined the factors that contribute to the graft atherosclerosis defined by graft failure at subsequent CCTA or substantial progression of graft stenosis (a decrease of ≥0.6 mm in diameter). In the second analysis, 66 grafts using no-touch harvested saphenous vein graft (N-SVG) were compared with those in the first analysis using C-SVG, focusing on the differences in intraoperative factors using propensity score-matched analysis. RESULTS In the first analysis, graft atherosclerosis+ group comprised 27 grafts, which had a larger SVG diameter, lower graft velocity, and higher graft/native ratio in diameter than the graft atherosclerosis- group. In the multivariable analysis, slow graft velocity and graft/native ≥2 in diameter were independently associated with the graft atherosclerosis. In the second analysis, the N-SVG group had a much greater graft velocity than the C-SVG group. CONCLUSION Lower graft velocity and higher graft/native ratio in diameter were associated with the graft atherosclerosis. The N-SVG group had increased graft velocity, which may contribute to prevent the graft atherosclerosis.(Trial registration: UMIN Clinical Trial Registry no. UMIN000050482. Registered 3 March 2023, retrospectively registered.).
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Affiliation(s)
- Ryo Nakamura
- Department of Thoracic and Cardiovascular Surgery, Wakayama Medical University, Wakayama, Wakayama, Japan
| | - Kentaro Honda
- Department of Thoracic and Cardiovascular Surgery, Wakayama Medical University, Wakayama, Wakayama, Japan
| | - Hideki Kunimoto
- Department of Thoracic and Cardiovascular Surgery, Wakayama Medical University, Wakayama, Wakayama, Japan
| | - Takahiro Fujimoto
- Department of Thoracic and Cardiovascular Surgery, Wakayama Medical University, Wakayama, Wakayama, Japan
| | - Kota Agematsu
- Department of Thoracic and Cardiovascular Surgery, Wakayama Medical University, Wakayama, Wakayama, Japan
| | - Yoshiharu Nishimura
- Department of Thoracic and Cardiovascular Surgery, Wakayama Medical University, Wakayama, Wakayama, Japan
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Gemelli M, Addonizio M, Geatti V, Gallo M, Dixon LK, Slaughter MS, Gerosa G. Techniques and Technologies to Improve Vein Graft Patency in Coronary Surgery. Med Sci (Basel) 2024; 12:6. [PMID: 38249082 PMCID: PMC10801616 DOI: 10.3390/medsci12010006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 12/22/2023] [Accepted: 01/05/2024] [Indexed: 01/23/2024] Open
Abstract
Vein grafts are the most used conduits in coronary artery bypass grafting (CABG), even though many studies have suggested their lower patency compared to arterial alternatives. We have reviewed the techniques and technologies that have been investigated over the years with the aim of improving the quality of these conduits. We found that preoperative and postoperative optimal medical therapy and no-touch harvesting techniques have the strongest evidence for optimizing vein graft patency. On the other hand, the use of venous external support, endoscopic harvesting, vein preservation solution and anastomosis, and graft configuration need further investigation. We have also analyzed strategies to treat vein graft failure: when feasible, re-doing the CABG and native vessel primary coronary intervention (PCI) are the best options, followed by percutaneous procedures targeting the failed grafts.
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Affiliation(s)
- Marco Gemelli
- Cardiac Surgery Unit, Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padua, 35128 Padova, Italy; (M.A.); (V.G.); (G.G.)
| | - Mariangela Addonizio
- Cardiac Surgery Unit, Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padua, 35128 Padova, Italy; (M.A.); (V.G.); (G.G.)
| | - Veronica Geatti
- Cardiac Surgery Unit, Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padua, 35128 Padova, Italy; (M.A.); (V.G.); (G.G.)
| | - Michele Gallo
- Department of Cardiothoracic Surgery, University of Louisville, Louisville, KY 40292, USA; (M.G.); (M.S.S.)
| | - Lauren K. Dixon
- Clinical Effectiveness Unit, The Royal College of Surgeons of England, London WC2A 3PE, UK;
| | - Mark S. Slaughter
- Department of Cardiothoracic Surgery, University of Louisville, Louisville, KY 40292, USA; (M.G.); (M.S.S.)
| | - Gino Gerosa
- Cardiac Surgery Unit, Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padua, 35128 Padova, Italy; (M.A.); (V.G.); (G.G.)
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Narayan P. VEST III trial - should we support the vein grafts? Indian J Thorac Cardiovasc Surg 2023; 39:319-321. [PMID: 37124604 PMCID: PMC10140207 DOI: 10.1007/s12055-023-01492-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 01/13/2023] [Accepted: 01/31/2023] [Indexed: 02/23/2023] Open
Abstract
VEST III trial is the largest randomized controlled trial to date to evaluate the role of external stents on late graft failure. In this study, an external stent was applied to vein grafts and compared with another unsupported vein graft in the same patient. The groups were compared for overall graft patency and intimal hyperplasia. Patent vein grafts were further assessed and graded based on the Fitzgibbon patency scale. This review discusses the strengths and weaknesses of the trial.
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Affiliation(s)
- Pradeep Narayan
- Department of Cardiac Surgery, Rabindranath Tagore International Institute of Cardiac Sciences, Narayana Health, 124, EM Bypass, Mukundapur Kolkata, 700099 India
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Vervoort D, Elbatarny M, Rocha R, Fremes SE. Reconstruction Technique Options for Achieving Total Arterial Revascularization and Multiple Arterial Grafting. J Clin Med 2023; 12:jcm12062275. [PMID: 36983276 PMCID: PMC10056232 DOI: 10.3390/jcm12062275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 03/11/2023] [Accepted: 03/14/2023] [Indexed: 03/17/2023] Open
Abstract
Ischemic heart disease is the leading cause of morbidity and mortality worldwide and may require coronary revascularization when more severe or symptomatic. Coronary artery bypass grafting (CABG) is the most common cardiac surgical procedure and can be performed with different bypass conduits and anastomotic techniques. Saphenous vein grafts (SVGs) are the most frequently used conduits for CABG, in addition to the left internal thoracic artery. Outcomes with a single internal thoracic artery and SVGs are favorable, and the long-term patency of SVGs may be improved through novel harvesting techniques, preservation methods, and optimal medical therapy. However, increasing evidence points towards the superiority of arterial grafts, especially in the form of multiple arterial grafting (MAG). Nevertheless, the uptake of MAG remains limited and variable, both as a result of technical complexity and a scarcity of conclusive randomized controlled trial evidence. Here, we present an overview of CABG techniques, harvesting methods, and anastomosis types to achieve total arterial revascularization and adopt MAG. We further narratively summarize the available evidence for MAG versus single arterial grafting to date and highlight remaining gaps and questions that require further study to elucidate the role of MAG in CABG.
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Affiliation(s)
- Dominique Vervoort
- Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, ON M5S 1A1, Canada
- Division of Cardiac Surgery, University of Toronto, Toronto, ON M5S 1A1, Canada
| | - Malak Elbatarny
- Division of Cardiac Surgery, University of Toronto, Toronto, ON M5S 1A1, Canada
| | - Rodolfo Rocha
- Division of Cardiac Surgery, University of Toronto, Toronto, ON M5S 1A1, Canada
| | - Stephen E. Fremes
- Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, ON M5S 1A1, Canada
- Division of Cardiac Surgery, University of Toronto, Toronto, ON M5S 1A1, Canada
- Schulich Heart Centre, Sunnybrook Health Sciences Centre, Toronto, ON M4N 3M5, Canada
- Correspondence: ; Tel.: +1-416-480-6073
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Kurup R, Sridhar K. Angiographically Patent Saphenous Vein Graft to Left Anterior Descending Artery at 51 years post Coronary Artery Bypass Grafting. CJC Open 2022; 4:660-662. [PMID: 35865024 PMCID: PMC9294986 DOI: 10.1016/j.cjco.2022.03.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Accepted: 03/28/2022] [Indexed: 10/28/2022] Open
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