Why the study?
Do electrocardiographic ST-T changes after exercise correlate with cardiac output and exercise capacity in patients with ischemic or hypertensive heart disease?
Do electrocardiographic ST-T changes after exercise correlate with cardiac output and exercise capacity in patients with ischemic or hypertensive heart disease?
Electrocardiographic ST-T changes after exercise correlate with hemodynamic responses and may serve as a useful index of exercise capacity in patients with ischemic or hypertensive heart disease.
Answers are grounded in this paper and cite their sources.
ST-T changes may associate with hemodynamic responses; leaves open whether they index exercise capacity or warrant prospective validation in ischemic or hypertensive disease.
Cardiac output and ST-T change of electrocardiogram were studied before and after exercise in 64 patients with ischemic or hypertensive heart disease or without heart disease. When ST depression was arised or increased more than 1mm. after exercise, cardiac output was increased in 47%, stroke volume was decreased in 82% and heart rate was increased in 94%. When peak of T was changed to upward more than 2mm. without ST depression or elevation more than 1mm. after excercise, cardiac output was increased in 91%, stroke volume was increased in 87% and heart rate was increased in 91%. Electrocardiographic change after exercise might be good index of exercise capacity in patients with ischemic or hypertensive heart disease.
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Kimura et al. (1970) studied this question.
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