目的探讨急性心肌梗死急诊PCI术后ST段变化与心功能关系及临床意义。方法首次急性心肌梗死行急诊PCI患者60例,比较PCI术前及术后1h相关导联抬高ST段的总和,按术后ST段回落程度分为两组:A组(36例):ST段下降程度≥50%;B组(24例):(ST段下降幅度<50%。观察患者PCI术前、术后10d心功能分级(Killip分级)。PCI术后10d、3个月行超声心动图检查测量左室射血分数(LVEF)值。结果两组患者PCI术前Killip分级差异无显著性;术后10dKillipⅠ级A组优于B组,差异有统计学意义(P<0.05)。术后10d、3个月LVEF值A组明显优于B组,差异有统计学意义(P<0.01)。结论 PCI术后1hST段的变化可反映PCI术后的心功能情况,对高危患者早期识别具有指导意义。 Objective To investigate the relationship between ST segment changes and cardiac function in patients with acute myocardial infarction after emergency PCI and its clinical significance. Methods Sixty patients undergoing primary PCI with acute myocardial infarction were divided into two groups according to the degree of postoperative ST-segment fall: group A (n = 36): ST (P <0.05) .Conclusion: In the group B (24 cases): (ST segment decreased by less than 50%, the Killip grading was observed 10 days before PCI and 10 days after PCI) The left ventricular ejection fraction (LVEF) was measured by echocardiography.Results There was no significant difference in Killip grade between the two groups before PCI; the level of KillipⅠgroup A was superior to that of group B after 10 days (P <0.05). The LVEF values ​​at 10 and 3 months postoperatively were significantly better in group A than those in group B (P <0.01) .Conclusion The changes at 1 h after PCI can reflect the cardiac function after PCI, Identification is instructive.