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The Annals of Thoracic Surgery, Vol 20, 646-651, Copyright © 1975 by The Society of Thoracic Surgeons

ARTICLES

Noninvasive cardiac evaluation (NICE) of intracardiac shunts using inhaled radioactive carbon dioxide

CL Byrd, D Watson, A Gilson, WM Smoak, F Hildner, M Martinez, JJ Greenberg and WZ Yahr

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.