Extent and functional capacity of coronary collateral circulation in the hypertensive patients with atherosclerotic coronary artery disease

ABSTRACT

This study was an evaluation of coronary collateral circulation in relation to the presence of systemic hypertension and left ventricular hypertrophy. One hundred patients with significant coronary artery disease [>75%] were enrolled in the study. 35 hypertensive patients with left ventricular hypertrophy [LVH] were considered as group I, 35 hypertensive patients without LVH as group II and 30 normotensive patients as group III. Coronary angiography was done for all patients. Class 0 No collateral, class I Partial filling and class II Complete filling of collaterals were used as angiographically classified coronary collaterals. Echocardiography and graded exercise ECG test were done for all patients. From the results obtained, it was concluded that patients with systemic hypertension and coronary artery disease have an increase in coronary collateral circulation corresponding to the left ventricular hypertrophy and that functional capacity of the coronary collateral circulation is not augmented by left ventricular hypertrophy