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Arjomandi Rad A, Tserioti E, Magouliotis DE, Vardanyan R, Samiotis IV, Skoularigis J, Ariff B, Xanthopoulos A, Triposkiadis F, Casula R, Athanasiou T. Assessment of Myocardial Viability in Ischemic Cardiomyopathy With Reduced Left Ventricular Function Undergoing Coronary Artery Bypass Grafting. Clin Cardiol 2024; 47:e24307. [PMID: 38953367 PMCID: PMC11217808 DOI: 10.1002/clc.24307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 05/16/2024] [Accepted: 06/05/2024] [Indexed: 07/04/2024] Open
Abstract
BACKGROUND We aim to provide a comprehensive review of the current state of knowledge of myocardial viability assessment in patients undergoing coronary artery bypass grafting (CABG), with a focus on the clinical markers of viability for each imaging modality. We also compare mortality between patients with viable myocardium and those without viability who undergo CABG. METHODS A systematic database search with meta-analysis was conducted of comparative original articles (both observations and randomized controlled studies) of patients undergoing CABG with either viable or nonviable myocardium, in EMBASE, MEDLINE, Cochrane database, and Google Scholar, from inception to 2022. Imaging modalities included were dobutamine stress echocardiography (DSE), cardiac magnetic resonance (CMR), single-photon emission computed tomography (SPECT), and positron emission tomography (PET). RESULTS A total of 17 studies incorporating a total of 2317 patients were included. Across all imaging modalities, the relative risk of death post-CABG was reduced in patients with versus without viability (random-effects model: odds ratio: 0.42; 95% confidence interval: 0.29-0.61; p < 0.001). Imaging for myocardial viability has significant clinical implications as it can affect the accuracy of the diagnosis, guide treatment decisions, and predict patient outcomes. Generally, based on local availability and expertise, either SPECT or DSE should be considered as the first step in evaluating viability, while PET or CMR would provide further evaluation of transmurality, perfusion metabolism, and extent of scar tissue. CONCLUSION The assessment of myocardial viability is an essential component of preoperative evaluation in patients with ischemic heart disease undergoing surgical revascularization. Careful patient selection and individualized assessment of viability remain paramount.
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Affiliation(s)
- Arian Arjomandi Rad
- Division of Medical SciencesUniversity of OxfordOxfordUK
- Department of Surgery and CancerImperial College LondonLondonUK
| | - Eleni Tserioti
- Department of Surgery and CancerImperial College LondonLondonUK
| | | | | | - Ilias V. Samiotis
- Department of Cardiothoracic SurgeryUniversity Hospital of LarissaLarissaGreece
| | - John Skoularigis
- Department of CardiologyUniversity Hospital of LarissaLarissaGreece
| | - Ben Ariff
- Department of Radiology, Hammersmith HospitalImperial College Healthcare NHS TrustLondonUK
| | | | | | - Roberto Casula
- Department of Surgery and CancerImperial College LondonLondonUK
- Department of Cardiothoracic Surgery, Hammersmith HospitalImperial College Healthcare NHS TrustLondonUK
| | - Thanos Athanasiou
- Department of Surgery and CancerImperial College LondonLondonUK
- Department of Cardiothoracic SurgeryUniversity Hospital of LarissaLarissaGreece
- Department of Cardiothoracic Surgery, Hammersmith HospitalImperial College Healthcare NHS TrustLondonUK
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Masroor M, Wang Y, Zhang C, Dong N. Surgical Management of Ischemic Cardiomyopathy Patients with Severe Left Ventricular Dysfunction: Is It Time to Reconsider Revascularization Surgery? J Cardiovasc Dev Dis 2024; 11:184. [PMID: 39057607 PMCID: PMC11276879 DOI: 10.3390/jcdd11070184] [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: 04/20/2024] [Revised: 06/05/2024] [Accepted: 06/19/2024] [Indexed: 07/28/2024] Open
Abstract
Ischemic cardiomyopathy patients with severe left ventricular dysfunction are a specific group of patients with poor surgical outcomes. There are few surgical treatment options in practice for the treatment of these patients such as heart transplantation, coronary artery bypass surgery, surgical ventricular restoration, etc. Despite multiple treatment options, there are no explicit clinical guidelines available to guide surgeons in choosing the most appropriate option and ensuring that the specific patient can benefit from the selected surgical treatment. Heart transplantation is the gold standard treatment for ischemic cardiomyopathy patients with severe left ventricular dysfunction, but it is limited to very few highly equipped centers around the world due to donor shortages, complex perioperative and surgical management, and limited technological and human resources. It is evident from some studies that heart transplant-eligible candidates can benefit from alternative surgical options such as coronary artery bypass surgery alone or combined with surgical ventricular restoration. Therefore, alternative surgical options that are used for most of the population, especially in developing and underdeveloped countries, need to be discussed to improve their outcomes. A challenge in the recent era which has yet to find a solution is to determine which heart transplant candidate can benefit from simple revascularization compared to a complex heart transplantation procedure. Myocardial viability testing was one of the most important determinants in deciding whether a patient should undergo revascularization, but its role in guiding appropriate surgical options has been challenged. This review aims to discuss the available surgical management options and their long-term outcomes for patients with ischemic cardiomyopathy, which will eventually help surgeons when choosing a surgical procedure.
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Affiliation(s)
- Matiullah Masroor
- Department of Cardiovascular Surgery, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; (M.M.); (Y.W.)
- Department of Cardiothoracic and Vascular Surgery, Amiri Medical Complex, Qargha Rd, Kabul 1010, Afghanistan
| | - Yixuan Wang
- Department of Cardiovascular Surgery, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; (M.M.); (Y.W.)
| | - Chao Zhang
- Department of Cardiovascular Surgery, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; (M.M.); (Y.W.)
| | - Nianguo Dong
- Department of Cardiovascular Surgery, Wuhan Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; (M.M.); (Y.W.)
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Zhang T, Masroor M, Jiang C, Xu L, Wang Y, Deng C, Dong N. Long-term survival of ischemic cardiomyopathy patients with severe left ventricular dysfunction after CABG vs heart transplantation: A single center retrospective analysis. Clin Transplant 2024; 38:e15243. [PMID: 38289883 DOI: 10.1111/ctr.15243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 12/16/2023] [Accepted: 01/04/2024] [Indexed: 02/01/2024]
Abstract
BACKGROUND There are no guidelines on the surgical management for ischemic cardiomyopathy (ICM) patients with severe left ventricular dysfunction. The present study aims to assess the long-term survival of these patients treated with two different surgical techniques, coronary artery bypass grafting (CABG) and heart transplantation (HTx). METHODS This retrospective study included 218 ICM patients with left ventricular ejection fraction (LVEF) ≤35% who underwent CABG (n = 106) and HTx (n = 112) from 2011 to 2021 in a single center. After propensity adjustment analysis each group consisted of 51 patients. Clinical characteristics were evaluated for all-cause follow-up mortality by the Cox proportional hazards regression model. A risk prediction model was generated from multivariable-adjusted Cox regression analysis and applied to stratify patients with different clinical risks. The long-term survival was estimated by Kaplan-Meier analysis for different surgery groups. RESULTS Long-term survival was comparable between CABG and HTx groups. After being stratified into different risk subgroups according to risk predictors, the HTx group exhibited superior survival outcomes compared to the CABG group among the high-risk patients (67.8% vs 44.4%, 64.1% vs 38.9%, and 64.1% vs 33.3%, p = 0.047) at 12, 36, and 60 months respectively, while the survival was comparable between HTx and CABG groups among low-risk patients (87.0% vs 97.0%, 82.4% vs 97.0%, and 70.2% vs 91.6%, p = 0.11) at 12, 36, and 60 months respectively in the PSM cohort. CONCLUSION Long-term survival in ICM patients with severe left ventricular dysfunction who received CABG or HTx was comparable in general. Nonetheless, a favorable outcome of HTx surgery compared to CABG was observed among high-risk patients.
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Affiliation(s)
- Tailong Zhang
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Matiullah Masroor
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
- Department of Cardiothoracic and Vascular Surgery, Amiri Medical Complex, Kabul, Afghanistan
| | - Chen Jiang
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Li Xu
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Yixuan Wang
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Cheng Deng
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Nianguo Dong
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
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Sharma VJ, Arghami A, Pasupula DK, Haddad A, Ke JXC. Outcomes of Coronary Artery Bypass Grafting in Patients With Poor Myocardial Viability: A Systematic Review and Meta-Analysis of the Last Decade. Heart Lung Circ 2022; 31:916-923. [PMID: 35339371 DOI: 10.1016/j.hlc.2021.12.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 12/30/2021] [Accepted: 12/31/2021] [Indexed: 12/28/2022]
Abstract
OBJECTIVES Our objective is to assess whether the presence of myocardial viability is a predictor of mortality among patients undergoing coronary artery bypasss grafting (CABG) through a systematic review meta-analysis. METHODS Comprehensive review of EMBASE and PubMed in accordance with PRISMA guidelines, including studies of patients undergoing CABG with assessment of myocardial viability and recorded long-term mortality, age and sex. Studies were restricted to the last decade, and data were stratified by imaging modality (magnetic resonance imaging [MRI] or nuclear medicine). Random-effects model for assessing pooled effect, heterogeneity assessment using Chi-square and I2 statistics, publication bias assessed by funnel plots and Egger's test. RESULTS Meta-analysis of contemporary data (January 2010 to October 2020) yielded 3,621 manuscripts of which 92 were relevant, and 6 appropriate for inclusion with 993 patients. Pooled analysis showed that patients with non-viable myocardium undergoing CABG are at 1.34 times the risk of mortality compared to those with viable myocardium (95% CI 1.01-1.79, p=0.05). Subgroup analysis of the MRI or nuclear medicine modalities was not statistically significant and there was no confounding by age or sex in meta-regression. There was significant heterogeneity in imaging modality and diagnostic criteria, but heterogeneity between study findings was low with an I2 statistic of 29%. The risk of publication bias was moderate on the Newcastle-Ottawa Scale), but not statistically significant (Egger's Test coefficient=1.3, 95%CI -0.35-2.61, p=0.10). CONCLUSIONS There is a multitude of methods for assessing cardiac viability for coronary revascularisation surgery, making meta-analyses fraught with limitations. Our meta-analysis demonstrates that the finding of non-viable myocardium can not be used draw conclusions for risk assessment in coronary surgery.
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Affiliation(s)
- Varun J Sharma
- Department of Cardiac Surgery, Austin Health, Heidelberg, Melbourne, Vic, Australia; Department of Surgery (Austin Health), Melbourne Medical School, Heidelberg, Melbourne, Vic, Australia; Harvard T.H. Chan School of Public Health, Harvard University, Boston, MA, USA.
| | - Arman Arghami
- Department of Cardiovascular Surgery, Mayo Clinic, Rochester, MN, USA; Harvard T.H. Chan School of Public Health, Harvard University, Boston, MA, USA
| | - Deepak Kumar Pasupula
- Department of Cardiology, MercyOne North Iowa Medical Center, Mason City, IA, USA; Harvard T.H. Chan School of Public Health, Harvard University, Boston, MA, USA
| | - Abdullah Haddad
- Harvard T.H. Chan School of Public Health, Harvard University, Boston, MA, USA
| | - Janny Xue Chen Ke
- Department of Anesthesia, Pain Management & Perioperative Medicine, Dalhousie University, Halifax, Canada; Department of Anesthesia, Providence Health Care, Vancouver, Canada; Department of Anesthesia, Pain Management & Perioperative Medicine, Dalhousie University, Halifax, Canada; Department of Anesthesiology, Pharmacology and Therapeutics, Faculty of Medicine, University of British Columbia, Vancouver, Canada; Harvard T.H. Chan School of Public Health, Harvard University, Boston, MA, USA
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