摘要：探讨冠状动脉病变严重程度、病变位置及冠心病介入治疗对ＱＴ离散度(QTd)及校正ＱＴ离散度（QTcd）的影响。入选159例已行冠脉造影术且心电图及临床资料完整的病例，按如下进行分组： （1）按病变狭窄程度分组：①无狭窄组，冠脉造影示病变狭窄<50%，为31例；②轻度狭窄组，冠脉造影示病变狭窄≥50%且<70%，为54例；③重度狭窄组，冠脉造影示病变狭窄≥70%，为74例。（2）根据病变位置分组：①前降支组，为45例；②回旋支组，为37例；③右冠脉组，为46例。（3）根据介入治疗前后分组为：①术前组，为99例；②术后组，为99例。观察冠状动脉病变狭窄程度、病变位置及介入治疗对QTd及QTcd的影响。结果：冠脉狭窄≥70%对QTd及QTcd影响明显，p<0.05，而冠脉狭窄<70%对QTd及QTcd无明显影响，p>0.05；冠脉病变所处位置对QTd及QTcd无明显影响，p>0.05；介入治疗前后QTd及QTcd变化明显，p<0.05，介入治疗术后与无狭窄组相比，QTd及QTcd无明显差异，p>0.05。结论：冠脉病变所出位置对QTd及QTcd无影响，病变严重程度及介入治疗对QTd及QTcd影响明显。
关键词：冠状动脉造影 心电图 QT离散度
YUAN Yi-qiang LIU Huai-ling MA Ye-xin,et al.The Influence of The Stenoses、Location and Intervention of Coronary Artery Disease (CAD)on QT Dispersion（QTd）and corrected QTd(QTcd).To investigate the influence of stenosis、location and intervention of CAD on QTd and QTcd.159 patients,who were performed coronary angiography,with complete clinical and ECG data,were divided into groups as follow:(1)Groups divivded into in accord with stenoses:①No stenoses group,stenoses <50%,31 cases;②Light stenoses goup,stenoses≥50% and <70%,54 cases;③Severe stenoses group,stenoses≥70%,74 cases.(2) Groups divided into in accord with the location of CAD:①Left anterior descending group,45 cases;②Left circumflex group,37 group;③Right coronary group,46 cases.(3)Groups divided into in accord with intervention time:①Before intervention group,99cases;②After intervention group,99 cases.Investigated the influence of stenoses、 location and intervention of CAD on QTd and QTcd.Results:Severe stenoses(≥70%)significantly influenced QTd and QTcd,p<0.05,and light stenoses(≥50% and <70%)didn’t significantly influence QTd and QTcd,p>0.05;The location of CAD didn’t significantly influence QTd and QTcd,p>0.05. Intervention significantly influenced QTd and QTcd,contrasted before with after operation,p<0.05,and contrasted after operation with no stenoses group,p>0.05.Conclusion:Severe stenoses and intervention significantly influenced QTd and QTcd,and the location hardly influenced QTd and QTcd.
Key words Coronary Angiography Electrocardiog
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