Unexplained Dyspnea Mayo Clinic Proceedings DELMAR J. GILLESPIE, M.D., PH.D., BRUCE A. STAATS, M.D. Mayo Clinic Proceedings Volume 69, Issue 7, Pages 657-663 (July 1994) DOI: 10.1016/S0025-6196(12)61344-5 Copyright © 1994 Mayo Foundation for Medical Education and Research Terms and Conditions
Fig. 1 Classic responses to exercise in normal subjects and in patients with various diseases or conditions. A-a DO2 = alveolar-arterial difference in partial pressure of oxygen; Anaer = anaerobic; COPD = chronic obstructive pulmonary disease; Decond = deconditioning; Max = maximal; Mod = moderate; MVV = maximal voluntary ventilation; N = normal; PaO2 = partial pressure of oxygen; Pulm vas = pulmonary vascular disease; VD/VT = ratio of volume of dead space to tidal volume; E max = maximal expired volume per unit time; O2 max = maximal oxygen consumption per unit time. Mayo Clinic Proceedings 1994 69, 657-663DOI: (10.1016/S0025-6196(12)61344-5) Copyright © 1994 Mayo Foundation for Medical Education and Research Terms and Conditions