transesophageal echocardiogram

A transesophageal echocardiogram puts the ultrasound probe on the end of a flexible tube and passes it down the swallowing pipe (esophagus), which lies directly behind the heart. Because only the thin esophageal wall separates the probe from the back of the heart — with no ribs or lung in the way — the pictures are strikingly clearer than from the chest surface, especially of structures at the rear of the heart.

The patient is given numbing throat spray and usually light sedation, then swallows the probe much as during a routine stomach endoscopy; the study takes around fifteen to thirty minutes. TEE excels at questions where fine detail matters: hunting for clots in the left atrial appendage before treating atrial fibrillation, assessing native or prosthetic valves in detail, finding the vegetations of infective endocarditis, mapping holes between the atria, and guiding structural procedures in real time in the catheterization or operating room.

Because it is semi-invasive, TEE is reserved for when the clearer view is genuinely needed rather than used routinely. It carries small risks from sedation and from the probe — sore throat, rarely esophageal injury — and patients must fast beforehand. When the transthoracic study answers the question, the gentler test is preferred.