Cardiomyopathy, Dilated, 1hh, also known as dilated cardiomyopathy 1hh, is related to cardiomyopathy, dilated, 1a and myopathy, myofibrillar, 6. An important gene associated with Cardiomyopathy, Dilated, 1hh is BAG3 (BAG Cochaperone 3). Affiliated tissues include heart and smooth muscle, and related phenotypes are dilated cardiomyopathy and increased left ventricular end-diastolic volume