It lets your healthcare provider see how your: A TEE is a diagnostic exam A transesophageal echocardiogram is a procedure that uses sound waves to produce images of heart structures and function. Due to its unique potential in improving cardiological diagnosis, the pro cedure is increasingly applied in small hospitals, private practice, and new settings such as the emergency room Guidelines for Performing a Comprehensive Transesophageal Echocardiographic Examination in Children and All Patients