All patients underwent coronary angiography via standard Judkins technique. Selective coronary angiograms were recorded using a digital angiographic system (Dicom‐viewer; MedCom GmbH, Darmstadt, Germany) for quantitative analysis. According to the baseline coronary angiograms, SS was calculated in all patients by two experienced cardiologists who were blinded to all other data. The SS was determined for each coronary lesion producing >50% diameter stenosis in vessels >1.5 mm, based on the SS calculator.11
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