what is enlarged and what is dilated
Dilated cardiomyopathy is a disease in which the heart muscle becomes enlarged and weak. Loss of ability to contract is a main component of the condition, affecting both left and right sides of the heart.
Causes of Enlarged Heart (Dilated Cardiomyopathy) in Dogs An enlarged heart is an acquired condition; the specific cause is presently unknown. Factors that are thought to contribute are as follows.