Hypertrophic cardiomyopathy, or HCM, is a genetic disease in which the heart muscle grows thicker than normal. You might think of the term “big-hearted” to connote something good, says Dr.

Hypertrophic cardiomyopathy (HCM) is an uncommon disease with significant consequences. Since the 1950s, major strides in understanding its etiology and pathogenesis have led to improved ...