Novel index of coronary collateral development as a useful predictor of clinical outcome in type 2 diabetic patients with coronary artery disease.

Background: There is a paucity of information regarding the impact of the coronary collaterals on prognosis in type 2 diabetic (T2DM) patients. We developed a novel index, which considers not only the degree of collateral circulation but also the stimulus of collateral development, and investigated its prognostic value in T2DM patients with coronary artery disease (CAD).

Methods And Results: One hundred and ninety four consecutive T2DM patients were analyzed and followed for an average of 30 months.