Echocardiography is an examination method that uses high-frequency sound waves to capture images of the structure of the heart. Echocardiography is usually assisted by Doppler technology which helps to measure the speed and direction of blood flow. Echocardiography is used to check for abnormalities in the structure of the heart, blood vessels, blood flow, and the ability of the heart muscle to pump blood. This imaging method is often used to detect potential heart disease so that an appropriate treatment can be decided, and is also used to evaluate treatments.