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Patients with cardiomyopathy, a stiffening and thickening of the heart muscle that weakens it, may develop an enlarged heart as it labors to pump an adequate supply of blood to the body. Coronary artery disease, in which plaque in the arteries interferes with the flow of blood, can cause the heart to enlarge.
What Does Enlarged Heart Mean ? An enlarged heart is medically known as cardiomegaly. This is not considered as a disease by doctors. Rather it is believed to be a symptom of an underlying health problem. As the name suggests, the heart appears to be enlarged when images of it are seen in an X-ray. Enlargement of the heart can occur when a woman is pregnant, or when a person develops coronary artery disease, the heart gets weak, there is a problem with the heart valves or when the heart is beating abnormally.