这是一个巨大、扩张的左心室，它是扩张性（也叫充血性）心肌病的典型特征。很多病例无明显的病因（因此被称为“原发性扩张性心肌病”），其它的病例则可能与长期酗酒有关。整个心脏变得又大又软。
Here is a large, dilated left ventricle typical of a dilated, or congestive, cardiomyopathy. Many of these have no known etiology (so-called "idiopathic dilated cardiomyopathy") while others may be associated with chronic alcoholism. The heart is very enlarged and flabby.