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J Thorac Cardiovasc Surg 1994;108:576-582
© 1994 Mosby, Inc.

SURGERY FOR ACQUIRED HEART DISEASE

Flow reversal in the descending aorta: A guide to intraoperative assessment of aortic regurgitation with transesophageal echocardiography

Boston, Mass.

Received for publication Nov. 2, 1993. Accepted for publication Jan. 28, 1994. Address for reprints: J.B. Mark, MD, Anesthesiology Service, Veterans Affairs Medical Center, 508 Fulton St., Durham, NC 27705.

Abstract

This study assessed the value of biplane transesophageal echocardiographic assessment of diastolic flow reversal in the descending aorta as an alternative to Doppler color flow imaging in determining severity of aortic regurgitation. In 45 patients undergoing cardiac operations, the severity of aortic regurgitation was assessed by semiquantitative grading of the width of the Doppler color flow regurgitant jet relative to the left ventricular outflow tract, and the presence of diastolic flow reversal was assessed with pulsed-wave Doppler measurements at three sites in the descending aorta. In four patients, the diastolic flow reversal method was the only available form of assessment because of inadequate visualization of the left ventricular outflow tract beneath a mitral valve prosthesis. Diastolic flow reversal in the descending aorta was not observed in patients without aortic regurgitation and was always present in patients with severe aortic regurgitation. Aortic valve replacement successfully eliminated descending aortic flow reversal in all 19 patients in whom it was present before valve replacement. Identification of diastolic flow reversal at multiple sites in the descending aorta with biplane transesophageal echocardiography helps to confirm the presence of severe aortic regurgitation and can serve as an alternative method of assessment when visualization of the left ventricular outflow tract is impaired. (J THORACCARDIOVASCSURG1994;108:576-82)

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