故50岁以上瓣膜手术的患者术前应常规行冠脉造影；
Paients under 50 do not evitabably be performed coronary angiography as routine.
方法按照病人的心电图ST段压低或抬高和单纯T波改变者分为A、B两组，行冠脉造影。
Methods patients were randomly assigned to electrocardiogram ST section change group(A) or pure T wave change group(B), receiving coronary angiography.
方法按照病人的心电图ST段压低或抬高和单纯T波改变者分为A、B两组，行冠脉造影。
Methods patients were randomly assigned to electrocardiogram ST section change group(A) or pure T wave change group(B), receiving coronary angiography.
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