在运动试验和心绞痛发作时的U波倒置被认为是心肌缺血的重要指标。本研究旨在阐明经皮冠状动脉成形术(PTCA)时U波倒置的临床意义。方法59例单支冠脉病变分为两组:左前降支(LAD)组41例,右冠状动脉(RCA)组18例。每例皆无其它主要冠脉明显狭窄(>50％)。PTCA时气囊充气达100—140磅/平方时的压力,保持60秒,每一病人气囊充气2—4次,但ECG测量只采取第一次充气的资料, U-wave inversion during exercise testing and angina pectoris is considered an important indicator of myocardial ischemia. The purpose of this study was to elucidate the clinical significance of U-wave inversion in percutaneous transluminal coronary angioplasty (PTCA). Methods 59 cases of single coronary artery lesions were divided into two groups: 41 cases in the left anterior descending (LAD) group and 18 cases in the right coronary artery (RCA) group. No major coronary stenosis (> 50%) was found in each case. The balloon was inflated at 100-140 psi at PTCA for 60 seconds with each patient balloon inflated 2-4 times, but the ECG measurements were taken on the first inflate,