eCite Digital Repository

Survival in patients with severe ischemic cardiomyopathy undergoing revascularization versus medical therapy: association with end-systolic volume and viability

Citation

Kwon, DH and Hachamovitch, R and Popovic, ZB and Starling, RC and Desai, MY and Flamm, SD and Lytle, BW and Marwick, TH, Survival in patients with severe ischemic cardiomyopathy undergoing revascularization versus medical therapy: association with end-systolic volume and viability, Circulation, 126, (11) pp. S3-S8. ISSN 0009-7322 (2012) [Refereed Article]

Copyright Statement

Copyright 2012 American Heart Association

DOI: doi:10.1161/circulationaha.111.084434

Abstract

Background—The value of assessment of viability as a predictor of surgical revascularization benefit in ischemic cardiomyopathy has recently been questioned in a large trial. We sought to determine whether the contribution of viability as myocardial scar burden (SB) to predict revascularization outcomes could be modulated by end-systolic volume index (ESVi).
Methods and Results—Delayed hyperenhancement–MRI was obtained in 450 patients with ≥70% stenosis in ≥1 epicardial coronary artery (75% men; median age, 62.8±10.7 years; mean left ventricular ejection fraction, 23±9%; mean ESVi, 115±50 mL) from 2002 to 2006. SB was quantified as scar percentage (infarcted mass/total left ventricular mass). Subsequent surgical revascularization was performed in 245 (54%) patients and subsequent percutaneous coronary interventions were performed in 28 (6%) patients. A propensity score was developed for revascularization. Cox proportional hazards models of all-cause mortality were used for risk adjustment. Over a mean follow-up of 5.8±2.7 years, 186 (41%) deaths occurred. After adjusting for prior revascularization, sex, diabetes, age, use of cardiac resynchronization therapy, implantable cardioverter defibrillator, mitral regurgitation, and mitral valve procedures; an interaction between scar percentage and ESVi (P=0.016) and an interaction between post-MRI revascularization and ESVi (iP=0.0017) were independently associated with mortality. ESVi demonstrated a significant interaction with revascularization and female sex, such that enhanced survival was associated with ESVi. ESVi also showed an interaction with SB; better survival was associated with lower volumes and less scar.
Conclusions—ESVi and SB provide independent, incremental prognostic value in patients with severe ischemic cardiomyopathy. The risk associated with SB should not be assessed in isolation.

Item Details

Item Type:Refereed Article
Keywords:survival, viability imaging, revascularization, ischemic cardiomyopathy, cardiac MRI
Research Division:Medical and Health Sciences
Research Group:Cardiorespiratory Medicine and Haematology
Research Field:Cardiology (incl. Cardiovascular Diseases)
Objective Division:Health
Objective Group:Clinical Health (Organs, Diseases and Abnormal Conditions)
Objective Field:Cardiovascular System and Diseases
Author:Marwick, TH (Professor Tom Marwick)
ID Code:91178
Year Published:2012
Web of Science® Times Cited:19
Deposited By:Menzies Institute for Medical Research
Deposited On:2014-05-09
Last Modified:2014-12-15
Downloads:0

Repository Staff Only: item control page