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Heart rate index: an indicator of left ventricular ejection fraction. Comparison of left ventricular ejection fraction and variables assessed by exercise test in patients studied early after acute myocardial infarction

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The present study compares the variables assessed by standard exercise test with the left ventricular ejection fraction (LVEF) measured by multigated radionuclide angiocardiography (MUGA) in 77 patients early after myocardial infarction. The exercise test and MUGA were performed within two weeks after the myocardial infarction. A significant correlation (Spearman's correlation coefficient rs, p less than 0.05) was found between LVEF at rest and the following variables assessed at exercise test: 1) the heart rate at rest, 2) rise in heart rate, 3) ratio between maximal heart rate and heart rate at rest, 4) rise in systolic blood pressure, 5) rate pressure product at rest, 6) rise in rate pressure product, 7) ratio (rHR) between maximal rate pressure product and rate pressure product at rest, 8) total exercise time. The heart rate was corrected for effects caused by age (heart index (HR%)) and a significant correlation was found between 1) the HR% at rest, 2) the rise in HR% and the LVEF. A simple method to identify patients with an abnormal LVEF is described.
OriginalsprogEngelsk
TidsskriftDanish Medical Bulletin
Vol/bind39
Udgave nummer4
Sider (fra-til)363-6
Antal sider4
ISSN0907-8916
StatusUdgivet - 1 aug. 1992

ID: 32476767