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(Chest. 1974;65:394-396.)
© 1974 American College of Chest Physicians

Comparative Responses to Orthostatic Stress in Normal and Abnormal Subjects

Evaluation by Impedance Cardiography

Sergio Sanchez Zambrano M.D.1 and David H. Spodick M.D., F.C.C.P.2

1 Lemuel Shattuck Hospital, Tufts University School of Medicine
2 Chief, Cardiology Division, Lemuel Shattuck Hospital; Professor of Medicine, Tufts University School of Medicine, Lecturer in Medicine, Boston University School of Medicine

The hemodynamic response to orthostatic stress was evaluated with an impedance cardiograph in both normal subjects and patients with cardiovascular disease. The results correlated well with our previous results and those of other investigators using either invasive or noninvasive methods, namely: as compared with the normal control subjects, patients with cardiovascular disorders had increased tolerance to orthostatic stress manifested by restricted or absent increases in heart rate, and decreases in stroke volume, cardiac output and ejection time.

Submitted on July 23, 1974
Accepted on November 14, 1974




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[Abstract] [Full Text] [PDF]


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Copyright © 1974 by the American College of Chest Physicians.