Methods: 97 patients with CAD confirmed by coronary angiography accepted digital subtraction carotid artery angiography ( DSA ) simultaneously.

• 方法：97例经冠状动脉造影确诊的患者同时行颈动脉数字减影血管造影(Digital Subtration Angiography，DSA)，以冠状动脉狭窄?50%25及累及情况，将冠心病患者分为一支、两支、三支病变组(包括左主干受累)；