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Ann Thorac Surg 1975;20:646-651
© 1975 The Society of Thoracic Surgeons

Articles

Noninvasive Cardiac Evaluation (NICE) of Intracardiac Shunts Using Inhaled Radioactive Carbon Dioxide

C.L. Byrd, M.D.*, D. Watson, M.D., A. Gilson, M.D., W.M. Smoak, M.D., F. Hildner, M.D., M. Martinez, M.D., J.J. Greenberg, M.D., W.Z. Yahr, M.D.

From the Department of Thoracic and Cardiovascular Surgery, Division of Cardiology, and the Division of Nuclear Medicine, University of Miami School of Medicine and Mt. Sinai Medical Center, Miami Beach, Fla

* Address reprint requests to Dr. Byrd, Department of Thoracic and Cardiovascular Surgery, Mt. Sinai Medical Center of Greater Miami, 4300 Alton Rd., Miami Beach, Fla. 33140

A totally new, noninvasive technique is presented for the detection and analysis of left-to-right cardiac shunts. Five millicuries of oxygen 15–labeled carbon dioxide is administered by a single-breath inhalation technique. The resultant lung washout curve accurately reflects the presence or absence of a shunt. The quantitative studies are promising, but the method must be compared with standard techniques in a statistically significant series. This work is in progress.






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Copyright © 1975 by The Society of Thoracic Surgeons.