Circulation, Vol 58, 368-375, Copyright © 1978 by American Heart Association
RF DeBusk, R Valdez, N Houston and W Haskell
Static and dynamic work involving the arms and the legs was performed by 40
men seven weeks after myocardial infarction. Leg ergometry produced a
significantly higher peak work load, systolic blood pressure (BPs), heart
rate (HR), and HR X BPs X 10(-2) product (DP) than did arm ergometry: 842
+/- 178 vs 546 +/- 135 kg-m/min, 176 +/- 24 vs 154 +/- 19 mm Hg and 256 +/-
54 vs 219 +/- 48 (SD). Peak heart rates were 145 and 142. Endpoints were
primarily muscular and generalized fatigue and dyspnea. Ischemic
abnormalities and ventricular ectopy were more frequent with leg ergometry.
Sustained forearm lifting elicited higher HR, PBs and DP responses than
sustained handgrip contraction: 95 +/- 16 vs 91 +/- 16 beats/min, 162 +/-
18 vs 152 +/- 17 mm Hg and 154 +/- 33 vs 139 +/- 33 (SD). Ischemic ST
segment depression and significant ventricuar arrhythmias were infrequent
with static effort. Dynamic leg testing is superior to dynamic or static
arm testing in assessing the capacity of patients to perform physical work
tasks after myocardial infarction.
ARTICLES
Cardiovascular responses to dynamic and static effort soon after myocardial infarction. Application to occupational work assessment
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