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American Journal of Epidemiology Vol. 91, No. 4: 368-377
Copyright © 1970 by The Johns Hopkins University School of Hygiene and Public Health

other

TREADMILL EXERCISE STUDY OF HEALTHY MALES IN A TOTAL COMMUNITY—TECUMSEH, MICHIGAN: CLINICAL AND ELECTROCARDIOGRAPHIC CHARACTERISTICS1,2

BENJAMIN N. CHIANG, HENRY J. MONTOYE and DAVID A. CUNNINGHAM

Chiang, B. N., H. J. Montoye and D. A. Cunningham (Univ. of Michigan School of Public Health, Ann Arbor, Mich.). Treadmill exercise study of healthy males in a total community—Tecumseh, Michigan: Clinical and electrocardiographic characteristics. Amer. J. Epid., 1970, 97: 368–377.—In a total community, Tecumseh, Michigan, 1, 064 healthy males aged 10–69 underwent a maximal or near maximal treadmill exercise test. No serious complication or fatality occurred. Thirty-eight of the 1, 064 or 3.6% showed ischemic ST segment depression ≤1 mm during and/or after exercise. The prevalence of ischemic ST segment depression increased with age, but none occurred in 427 persons under the age of 29. Characteristic patterns of the ST segment in this group of healthy men are their transient nature and lack of chest pain in spite of this change. Ventricular premature beats during exerdse occurred in 6.5%; the prevalence parallels that of ischemic ST segment depression. Orthostatic T wave inversions and post-exercise giant T waves (100% or more increase in amplitude) are common findings among young persons under the age of 40.

blood pressure; cardiology; electrocardiography; exercise test; exertion; heart rate; metabolism; oxygen consumption

1From the Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor, Mich.

2This study was supported in part by the Cardiovascular Research Center, University of Michigan, under Program Project Grant HE-06378, the National Heart Institute, National Institutes of Health, Bethesda, Maryland, and in part by Grant Number CD00246, National Institutes of Health. Dr. Chiang was aided in this study by international postdoctoral research fellowship 5-FOJ-TW 1025, National Institutes of Health.


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