A transesophageal echocardiogram is an ultrasound of the heart. It uses sound waves that are bounced off the heart, reflected back and converted to images on the screen. A trained cardiologist will pass a flexible tube through the mouth and into the esophagus to obtain more information about your heart. This gives clearer pictures of the values, structures, and size of the heart as opposed to an echocardiogram done from outside the chest wall.
The images reflect the structure of the heart and the function and movement of the valves and heart chambers.