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  • Title: A comparison of static and dynamic exercise soon after myocardial infarction.
    Author: Markiewicz W, Houston N, DeBusk R.
    Journal: Isr J Med Sci; 1979 Nov; 15(11):894-7. PubMed ID: 528173.
    Abstract:
    The cardiovascular response to treadmill exercise testing and to isometric handgrip was compared in 20 selected patients three to five weeks after acute myocardial infarction. The heart rate and the heart rate-systolic blood pressure product were significantly higher during treadmill exercise than during two minutes of isometric handgrip sustained at 25% of maximum voluntary contraction. No significant difference in systolic blood pressure was noted between the two types of exercise while diastolic blood pressure was higher during isometric exercise. Asymptomatic ST-segment depression was noted in two patients during the the treadmill test and was absent during handgrip. Angina pectoris was not noted during either type of exercise. Ventricular ectopic activity was slightly more frequent during treadmill exercise. Isometric handgrip at 25% of maximum voluntary contraction may be performed safely soon after myocardial infarction and provides useful guidelines for performing many customary physical activities requiring upper extremity isometric exertion during early convalescence.
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