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European Heart Journal 1984 5(4):289-294;
Copyright © 1984 by the European Society of Cardiology.
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© 1984 The European Society of Cardiology

Quantitative evaluation of exercise-induced ST- segment depression for estimation of degree of coronary artery disease

I. BERÉNYI, I.S. HAJDUCZKI and E. BÖSZÖRMÉNYI

State Hospital/or Cardiology Balatonfured, Hungary

Received 5 January 1983; revised 14 November 1983; .

Address for correspondence: Dr Istvan Berinyi, Allami K6rhdz, 8231. BalatonfQred Gyógy tér 2. Hungary.

Abstract

Comparative analysis of coronary arteriography and exercise ECG recordings of 33 patients with ischae-mic heart disease is presented. Linear regression was found between the increase of heart rate (HR) as well as increase of systolic blood pressure-heart rate product (SBPxHR) and the level of ST-segment depression developing during exercise. A significant correlation was established between the slope of the regression line (i.e. 'm'coefficient of y=mx+b) expressing the rate of change of ST-segment depression and the degree of coronary artery disease confirmed by arteriography. The average value of 'm' coefficients differed significantly according to the number of diseased vesseb (P< 001-0.001). The ratio of maximal ST depression and maximal HR (STmax/HRmax) measured at the end of the exercise indicated reliably the severity of coronary artery disease and is suggested for everyday practice.

Key Words: Exercise ECG • ST-segment depression • severity of coronary artery disease • coronary arteriography


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P. M. Okin, M. S. Lauer, and P. Kligfield
Chronotropic Response to Exercise: Improved Performance of ST-Segment Depression Criteria After Adjustment for Heart Rate Reserve
Circulation, December 15, 1996; 94(12): 3226 - 3231.
[Abstract] [Full Text]


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