Use of Echocardiography in Patients with Hypertrophic Cardiomyopathy: Clinical Implications of Massive Hypertrophy

We examined the 10-year outcome of 107 patients with hypertrophic cardiomyopathy and massive myocardial hypertrophy as assessed by echocardiography. These patients demonstrated excess mortality in comparison with their expected survival with respect to a general population of individuals (10-year survival 77% vs 95%, P < .001). Adverse events occurred primarily in the youngest and oldest patients. Sudden cardiac death was the most frequent cause...