Cardiomegaly

**Definition:** Enlargement of the HEART, usually indicated by a cardiothoracic ratio above 0.50. Heart enlargement may involve the right, the left, or both HEART VENTRICLES or HEART ATRIA. Cardiomegaly is a nonspecific symptom seen in patients with chronic systolic heart failure (HEART FAILURE) or several forms of CARDIOMYOPATHIES.

**Tree numbers:** - C14.280.195 - C23.300.775.250

**Synonyms:** - Enlarged Heart - Heart Enlargement