Echocardiogram

An echocardiogram — often called an "echo" — is a non-invasive imaging test that uses high-frequency sound waves, the same basic technology as a pregnancy ultrasound, to create real-time pictures of your heart in motion. A technician places a handheld probe called a transducer on your chest; it emits sound waves that bounce off the heart's structures and return as echoes, which a computer translates into detailed moving images on a screen.

The test can show the size and shape of your heart, how well each chamber contracts and relaxes, whether the valves are opening and closing properly, and whether blood is flowing in the right direction. It is particularly useful for diagnosing conditions such as heart failure, valve disease, cardiomyopathy (disease of the heart muscle), and fluid around the heart (pericardial effusion). It can also detect blood clots inside the heart chambers and congenital abnormalities present since birth.

Several variations of the test exist. A standard transthoracic echocardiogram is performed from outside the chest and is the most common type. A transesophageal echocardiogram (TEE) involves guiding a small probe down the esophagus to get clearer images from behind the heart. A stress echocardiogram combines the imaging with exercise or medication to see how the heart performs under demand. Your doctor will choose the type best suited to the question they are trying to answer.

The heart is the organ your entire circulatory system depends on, and an echocardiogram is one of the most informative single tests available for assessing how it is working. Unlike an ECG (electrocardiogram), which captures the heart's electrical activity, an echo shows the heart's mechanical function — how forcefully it contracts, how efficiently it fills with blood, and whether its structures are intact.

For people with known heart disease, the test helps guide treatment decisions and monitor whether therapy is working. For those with symptoms such as shortness of breath, chest pain, or an unusual heartbeat, it can point toward or away from a cardiac cause. Because it uses sound waves rather than radiation, it is considered very safe and can be repeated as often as clinically needed without cumulative risk.