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Psychosomatic Medicine, Vol 48, Issue 3 159-166, Copyright © 1986 by American Psychosomatic Society
ORIGINAL ARTICLES |
H Scher, LM Hartman, JJ Furedy and RJ Heslegrave
Phasic changes in heart rate (HR) and electrocardiographic T-wave amplitude (TWA) were monitored in healthy Type A (coronary-prone) and Type B (non-coronary-prone) men during the performance of a difficult arithmetic task. Type As showed significantly greater reductions in TWA as compared to Type Bs, though no group differences were present in HR change. This pattern of results, wherein a significant Type A-B difference was observed in a phasic measure of ventricular performance (TWA), but not in one of supraventricular performance (HR), suggests that Type As experience excessive neurally mediated sympathetic stimulation of the myocardium during mental work.
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