Echocardiography is a non-invasive diagnostic test that uses high-frequency sound waves to create detailed images of the heart. These images, known as echocardiograms, can provide valuable information about the structure and function of the heart, such as the size and shape of the heart chambers, the movement of the heart valves, and the pumping function of the heart. Echocardiography is commonly used to diagnose and monitor various heart conditions, such as heart failure, heart valve disorders, and congenital heart defects. It is also used to assess the effectiveness of treatments and interventions on the heart.