Cardiomyopathy, Dilated, 1r, also known as left ventricular noncompaction 4, is related to cardiomyopathy, dilated, 1a and cardiomyopathy, familial hypertrophic, 1. An important gene associated with Cardiomyopathy, Dilated, 1r is ACTC1 (Actin Alpha Cardiac Muscle 1). Affiliated tissues include heart and heart-ventricle, and related phenotypes are left ventricular hypertrophy and restrictive cardiomyopathy