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晚近的研究指出,在以S-T段抬高或压低为特征的休息时心绞痛病人,心绞痛的发作不能归之与使心肌耗氧增加的血液动力学因素。这些病人的心肌显影研究显示,疼痛发作时伴有S一T段抬高者有大块穿壁性心肌示踪物摄取减少,而疼痛发作时伴有8一T段压低者则有弥漫性或边界不清的示踪物摄取减少;前者为主要冠状动脉分支呈痉挛,而后者血管痉挛不很严重或仅为一个小
Recent studies have shown that angina attacks in patients with rest angina pectoris characterized by elevation or depression of the S-T segment can not be attributed to hemodynamic factors that increase myocardial oxygen consumption. Myocardial imaging studies in these patients showed that there was a reduction in the number of tracts with large tracts of tracts in patients with episodes of S-T elevation and painful episodes with 8-T depression Unclear traces of tracer intake; the former is the main coronary artery spasm, while the latter is not very serious vascular spasm or only a small