Abstract
Background: The prognostic value of late gadolinium enhancement (LGE) on contrast-enhanced cardiovascular magnetic resonance (CMR) in Japanese hypertrophic cardiomyopathy (HCM) patients in a large, single-center cohort was investigated. Methods and Results: A total of 345 HCM patients (mean age, 59±17 years; 214 male) underwent CMR with gadolinium enhancement, and were followed (mean duration, 21.8 months) for cardiovascular events. Patients were divided into event-positive and event-negative groups. The clinical and CMR characteristics were compared between the 2 groups, and predictors of cardiovascular events assessed on multivariate analysis. LGE was positive in 252 patients (73%). The annual cardiovascular events rate was significantly higher in patients with LGE than in those without (6.2%/year vs. 0.6%/year, P=0.003). On multivariate analysis, LGE (hazard ratio [HR], 7.436; 95% confidence interval [CI]: 1.001–55.228, P=0.050), increased myocardial mass index (HR, 1.013; 95% CI: 1.002–1.023, P=0.018), reduced left ventricular ejection fraction (HR, 0.965; 95% CI: 0.945–0.985, P=0.001), and atrial fibrillation (HR, 2.257; 95% CI: 1.024–4.976, P=0.043) were significantly associated with cardiovascular events. Conclusions: The presence of LGE, increased myocardial mass index, reduced left ventricular ejection fraction and atrial fibrillation were independent predictors of adverse prognosis in Japanese HCM patients. (Circ J 2014; 78: 929–937)
