Quantitative testing for the cardiac patientthe value of monitoring gas exchangeIntroductionCOHN, JAY N. M.D.Author informationCardiovascular Division, Department of Medicine, University of Minnesota Medical School, Minneapolis.Address for correspondence: Jay N. Cohn, M.D., University of Minnesota Medical School, Box 488 UMHC, 420 Delaware St., SE, Minneapolis, MN 55455.Circulation 76:p VI-2, December 1987.Copyright © 1987 American Heart Association, Inc.