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血管痉挛性心绞痛患者,冠脉扩张成形术(PTCA)后再狭窄的发生率很高。本研究的目的是:PTCA前过度换气试验引起的冠脉异常收缩能否预告PTCA 成功后发生再狭窄的危险性。方法对象是106例不稳定型心绞痛的单支病变者。PTCA前 1～4天行过度换气试验,即令患者尽可能快和深地连续呼吸5分钟,每分钟不得少于30次。试验前、试验中及试验后的头10分钟,每1分钟测血压及记录12导联心电图一次。试验停止的恢复期心电图出现过度换气引发的心肌缺血性改变——J点后80msec处ST段抬高或压低>
In patients with angiospastic angina, the incidence of restenosis after coronary angioplasty (PTCA) is high. The purpose of this study was to examine whether PTCA can predict the risk of restenosis after successful PTCA. Methods The object was 106 patients with unstable angina pectoris single-vessel disease. One to four days before PTCA hyperventilation test, so that patients as soon as possible and deep breathing continuously for 5 minutes, not less than 30 times per minute. Before the test, during the test and after the first 10 minutes of the test, blood pressure was measured every 1 minute and the 12-lead electrocardiogram was recorded once. Myocardial ischemic changes due to hyperventilation in the recovery electrocardiogram at the end of the trial - ST elevation or depression at 80 msec after J point>