has modifier dilated cardiomyopathy familial cardiomyopathy familial dilated cardiomyopathy A a genetic form of heart disease that occurs when heart (cardiac) muscle becomes thin and weakened in at least one chamber of the heart, causing the open area of the chamber to become enlarged (dilated). As a result, the heart is unable to pump blood as efficiently as usual. To compensate, the heart attempts to increase the amount of blood being pumped through the heart, leading to further thinning and weakening of the cardiac muscle. Over time, this condition results in heart failure. DCM Editor note: unsure if GARD is familial form GARD:0000221 GARD:0002905 ICD10:I42.0 MESH:C536231 MONDO:0016333 OMIMPS:115200 Orphanet:217607 UMLS:C0340427 dilated cardiomyopathy, familial hereditary dilated cardiomyopathy hypokinetic dilated cardiomyopathy, familial idiopathic dilated cardiomyopathy inherited