Key result
Luminal narrowing ≥70% predicts angiographic collaterals with perfect specificity, modifying ischemic LV function.
Why the study?
The determinants and protective potential of coronary arterial collaterals during abrupt coronary occlusion were not fully understood, particularly their relation to lesion severity and location.
Population
59 patients undergoing angioplasty including 36 with normal LV function and 23 with coronary occlusion complications
Comparison
Collateral blood flow indexes (DCOP/Pao ratio and angiographic collateral class) assessed during balloon occlusion
Design
Observational study with retrospective model validation
Authors
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≥70% stenosis may identify protective collaterals preserving LV function; leaves open whether routine assessment alters management in CAD.
Observational (n=59)
Coronary lesion severity ≥70% is a threshold for collateral development, which in turn protects left ventricular function during abrupt coronary occlusion.
Rentrop et al. (1988) conducted an observational in Coronary artery disease undergoing angioplasty (n=59). Coronary arterial collaterals was evaluated on Angiographically demonstrable collaterals. A reduction in luminal diameter by ≥70% predicted angiographically demonstrable collaterals with 100% specificity and 85% sensitivity, which modified left ventricular function during ischemia.
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