As the name suggests, enlarged heart is an increase in the size of the heart. It's detected by physical examination, X-ray or other imaging tests.
An enlarged heart may be caused by a thickening of the heart muscle because of increased workload. (This increased workload can be due to heart valve disease or high blood pressure, for example.) This is called hypertrophy which refers to enlargement of an organ or tissue due to an increase in cell size.
Left ventricular hypertrophy (LVH) is the medical term for enlargement of the left ventricle. (The left ventricle is the heart's main pumping chamber.) Hypertrophy also occurs in hypertrophic cardiomyopathy. Enlarged heart may also be a dilation (expansion) of the heart due to damage that weakens the heart muscle.
While having an enlarged heart may not always be preventable, it's usually treatable. Treatment for enlarged heart is aimed at correcting the underlying cause. Treatment for an enlarged heart can include medications, medical procedures or surgery.
Good question to discuss with your Dr.