An increase in the size of the heart that is detected by physical examination, X-ray or other imaging tests. It can be a dilation (expansion) of the heart in response to muscle damage. It may result from a thickening of the heart muscle, called hypertrophy, in response to increased workload (such as in valve disease or high blood pressure).
a condition in which the heart is larger than normal due to heredity, long-term heavy exercise, or diseases and disorders such as obesity, high blood pressure, and coronary artery disease.