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目的 :探讨心电图 STV3/ 比值 (STV3/ )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 36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 (L CX)组 导联 ST段抬高程度依次减小 ,V3导联 ST段降低程度依次增加 ,但多无显著性差异 ;而STV3/ 在 3组间差异显著 (P <0 .0 5或 0 .0 0 1) ;2 STV3/ 的分布 :STV3/ <0 .5者在 RCA近段组占 13/ 17例 ,0 .5≤ STV3/ ≤ 1.2者在 RCA远段组占 9/ 13例 ,STV3/ >1.2者在 L CX组占 4/ 6例。 3以 STV3/ <0 .5预测 RCA近段的敏感性 76 .5 %、特异性 78.9% ,以 0 .5≤ STV3 / ≤ 1.2预测 RCA远段的敏感性 6 9.2 %、特异性 78.3% ,以STV3/ >1.2预测 L CX的敏感性 6 6 .7%、特异性 96 .7%。结论 :心电图 STV3 / 是判断 AIMI患者梗死相关动脉及闭塞位置较准确的新指标。
Objective: To investigate the role of STV3 / STV3 in judging the location of artery and occlusion related to acute inferior myocardial infarction (AIMI). Methods: The electrocardiogram and coronary angiography data of 36 patients with AIMI were compared. Results: 1 The extent of ST segment elevation in the proximal RCA segment, RCA distal segment and left circumflex artery (L CX) leads decreased in turn and the ST segment decrease in V3 lead increased in turn, but there was no significant difference (P <0.05 or 0.0100). The distribution of STV3 / STV3 / <0.5 was 13/17 cases in the proximal RCA group, while 0 .5 ≤ STV3 / ≤ 1.2 in the RCA distal segment accounted for 9/13 cases, STV3 /> 1.2 in the L CX group accounted for 4/6 cases. 3 The sensitivity and specificity of RCA in the proximal RCA were predicted to be 76.5% and 78.9% with STV3 / <0.5, respectively. The sensitivity and accuracy of RCA distal segment were estimated to be 6.22% and 78.3% The sensitivity of L CX was predicted by STV3 /> 1.26.67% and the specificity was 96.7%. Conclusion: ECG STV3 / is a new index to judge the location of infarction-related artery and occlusion in patients with AIMI.