Why is an echocardiogram performed on a person?

It depends. Echocardiography is performed to provide information about the structure and function of the heart. It can provide information about structural abnormalities such as valve abnormalities and congenital defects. It is also helpful to determine how well the heart functions as well as pressures inside the heart. It can also be utilized to look for abnormalities of the aorta.
Analyze functioning. An echo can show a physician any structural abnormalities of the heart muscle, fluid buildup or inflammation in the pericardial sac around the heart, motion of the heart valves, correct motion of the 4 chambers, proper blood flow through the heart chambers, leakiness of the valves, and efficiency of the heart function.