Effect of Coronary Collateral Circulation on Exercise Stress Test

In this study, patients who have recovery-only ST segment depression in exercise stress test were chosen. It is proposed that coronary collateral circulation could improve with stress-increased coronary perfusion, and accordingly, patients with recovery-only ST segment depression were evaluated by c...

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Bibliographic Details
Published in:Angiology 1998-08, Vol.49 (8), p.619-624
Main Authors: Pamir, Gülgün, Çağlar, Nail, Oral, Derviş, Aslan, S. Murat, Kumbasar, Deniz
Format: Article
Language:English
Subjects:
Biological and medical sciences
Cardiology. Vascular system
Case-Control Studies
Collateral Circulation - physiology
Coronary Angiography
Coronary Circulation - physiology
Coronary Disease - diagnosis
Coronary Disease - diagnostic imaging
Coronary Disease - physiopathology
Coronary heart disease
Electrocardiography
Exercise Test
Female
Heart
Humans
Male
Medical sciences
Middle Aged
Myocardial Ischemia - physiopathology
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Summary:In this study, patients who have recovery-only ST segment depression in exercise stress test were chosen. It is proposed that coronary collateral circulation could improve with stress-increased coronary perfusion, and accordingly, patients with recovery-only ST segment depression were evaluated by coronary angiography for grading the coronary collateral circulation. Twenty-one men and five women were assigned to the study group. Sixteen men and two women who had exercise-induced ST segment depression were assigned to the control group. Age and gender of both groups were not statistically different (p > 0.05) . The reason for terminating the exercise stress test was chest pain in two of 26 patients in the study group versus 15 of 18 in the control group (p < 0.001 ) . In both groups coronary collateral frequency and grade were directly correlated with the severity of the coronary artery disease (p < 0.001 in the study group, and p < 0.05 in the control group). When both groups were compared for the frequency of significant coronary collateral circulation, 14 of 26 patients in the study group versus 4 of 18 patients in the control group had significant coronary collateral circulation (p=0.035). The authors conclude that recovery-only ST segment depression correlates well with the frequency of significant coronary collateral circulation, and coronary collaterals may prevent myocardial ischemia during exercise.
ISSN:0003-3197
1940-1574
DOI:10.1177/000331979804900805