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A组271例病人冠脉单处(142例)或者多处(129例)完全闭塞。B组 1429例病人冠脉单处(855例)或者多处(544例)次全闭塞(内径狭窄≤99%)。A组同B组相比,既往心肌梗塞者较多(在单处病变者中45％对32％,P<0.01;在多处病变者中 68％对32％,P<0.001),左室射血分数<50％者也较多(24％对15％,P<0.05;35％对16％,P<0.001),其他基础状况无显著差异。即时成功指 PTCA后内径扩大≥20％,
A group of 271 patients with coronary atherectomy (142 cases) or multiple (129 cases) completely occluded. In group B, 1429 patients underwent coronary occlusion (855 cases) or multiple (544 cases) subtotal occlusions (diameter stenosis ≤99%). Group A had more previous myocardial infarctions compared with Group B (45% vs. 32% in unipheral lesions, P <0.01; 68% vs. 32% in multiple lesions, P <0.001), left ventricular There were also more cases with ejection fraction <50% (24% vs 15%, P <0.05; 35% vs 16%, P <0.001). There was no significant difference in other basal conditions. Immediate success refers to the expansion of the diameter after PTCA ≥ 20%