“An enlarged heart (cardiomegaly) isn’t a disease, but rather a sign of another condition. Certain conditions may cause the heart muscle to become thicker or cause one of the chambers of the heart to dilate, making the heart larger. Depending on the condition, an enlarged heart may be temporary or permanent.

An enlarged heart may be treatable by correcting the cause. Treatment for an enlarged heart can include medications, medical procedures or surgery.”

MAYO CLINIC