Echocardiography, commonly known as an "echo" is a non-invasive ultrasound imaging test that uses high-frequency sound waves to create detailed pictures of the heart’s structure and function. During a visit, an ultrasound technologist will apply gel to the chest and use a transducer to send and receive sound waves, which are then converted into real-time images displayed on a monitor. This diagnostic tool is invaluable for assessing heart chamber size, wall motion, valve function, and blood flow dynamics, providing crucial information or diagnosing various cardiac conditions.