Prognostic value of myocardial viability by delayed-enhanced magnetic resonance in patients with coronary artery disease and low ejection fraction: impact of revascularization therapy

Journal of the American College of Cardiology
Bernhard L GerberJean-Louis Vanoverschelde

Abstract

The purpose of this study was to evaluate the impact of myocardial viability assessment by delayed-enhanced cardiac magnetic resonance (DE-CMR) and of revascularization therapy on survival in patients with coronary artery disease (CAD) and low ejection fraction (EF). Prior studies have shown that DE-CMR predicts recovery of left ventricular (LV) dysfunction after revascularization. The authors prospectively evaluated survival of 144 consecutive patients (130 males, age 65 ± 11 years) with CAD and LV dysfunction (EF: 24 ± 7%) undergoing DE-CMR. Eighty-six patients underwent complete revascularization of dysfunctional myocardium (79 coronary artery bypass grafting, 7 percutaneous coronary intervention), whereas 58 patients remained under medical treatment. Over the 3-year median follow-up, 49 patients died. Three-year survival was significantly worse in medically treated patients with dysfunctional viable than with nonviable myocardium (48% vs. 77% survival, p = 0.02). By contrast, in revascularized patients, survival was similar whether myocardium was viable or not (88% and 71% survival, respectively, p = NS). Hazard of death of viable myocardium remaining under medical treatment versus complete revascularization was 4.56 (95% c...Continue Reading

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