Echocardiogram, often referred to as a cardiac echo or simply an echo, is a sonogram of the heart. Echocardiography uses standard two-dimensional, three-dimensional, and Doppler ultrasound to create images of the heart.
Transthoracic Echocardiogram (Echo, TTE)
An echocardiogram (or "echo") is a diagnostic test for the heart. An ultrasound is performed on the heart by applying an instrument to the outside of the chest.
Transoesophageal Echocardiogram (TOE)
A transoesophageal echocardiogram or “TOE” or “TEE” is a diagnostic ultrasound test on the heart.