Transesophageal color flow Doppler features of aorta to right ventricle fistula.

A patient developed aortic-to-right ventricular fistula after aortic valve replacement surgery and infective endocarditis. The fistula was not detected by transthoracic two-dimensional echocardiography and color flow Doppler. The transesophageal study, however, was instrumental in diagnosing this entity and prompting surgical resection of the fistula.