【摘要】 目的探讨心电图STV3/Ⅲ比值对判断急性下壁心肌梗死(AIMI)相关动脉及闭塞位置的作用。方法对50例AIMI患者的心电图和冠状动脉造影资料进行对比分析。结果(1)右冠状动脉(RCA)近段、RCA远段、左旋支(LCX)导联ST段抬高程度依次减小(P<0.05),V3导联ST段降低程度依次增加(P<0.05);(2)STV3/Ⅲ<0.5者在RCA近段组占10/14例,0.5≤STV3/Ⅲ≤1.2者在RCA远段组占10/16例,STV3/Ⅲ>1.2者在LCX组占13/20例;(3)以STV3/Ⅲ<0.5预测RCA近段的敏感度为71.4%、特异度为86.1%,以0.5≤STV3/Ⅲ≤1.2预测RCA远段的敏感度为62.5%、特异度为76.4%,以STV3/Ⅲ>1.2预测LCX的敏感度为65.0%、特异度为86.7%。结论心电图STV3/Ⅲ是判断AIMI患者梗死相关动脉及闭塞位置较准确的新指标。更多还原

【Abstract】 Objective To investigate the value of the electrocardiogram in predicting the infarct-related artery and the location of occlusion in inferior wall acute myocardial infarction.Methods The data of electrocardiogram and coronary angiographic findings in 36 patients with inferior wall acute myocardial infarction were comparatively analyzed.Results （1）The degree of the proximal right coronary artery （RCA） group,the distal RCA group and the left circum flex artery （LCX） group ST Ⅲ elevation were was devolutly decreased （ P <0.05）,whereas the degree of ST V₃ depression was devolutly increased （ P <0.05）.（2） Among the three groups,there were significant differences in ST V₃/Ⅲ ratio （ P <0.01）.There were 10 out of 14 patients with ST V₃/Ⅲ <0.5 in proximal RCA group,10 out of 16 patients with 0.5≤ST V₃/Ⅲ ≤1.2 in group distal RCA group,and 13 out of 20 patients with ST V₃/Ⅲ >1.2 in LCA group LCX.（3） The sensitivities and specificities were 71.4% and 86.1%,respectively when ST V₃/Ⅲ<0.5 was used to predict proximal RCA,62.5% and 76.4%,respectively when 0.5≤ST V₃/Ⅲ ≤1.2 was used to predict distal RCA,and 65.0% and 86.7%,respectively when ST V₃/Ⅲ >1.2 was used to predict LCX.Conclusion ST V₃/Ⅲ is an effective new criterion in predicting the infarct-related artery and the location of occlusion in inferior wall acute myocardial infarction.更多还原