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1、冠状动脉病变严重程度、病变位置及冠心病介入治疗对ＱＴ离散度的影响摘要：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
2、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
3、。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9YUANYi-qiangLIUHuai-lingMAYe-xin,etal.TheInfluenceofTheStenoses、LocationandInterventionofCoronaryArteryDisease(CAD)onQTDispersion（QTd）andcorrectedQTd(QTcd).Toinvestigatetheinfluenceofsten
4、osis、locationandinterventionofCADonQTdandQTcd.159patients,whowereperformedcoronaryangiography,withcompleteclinicalandECGdata,weredividedintogroupsasfollow:(1)Groupsdivivdedintoinaccordwithstenoses:①Nostenosesgroup,stenoses<50%,31cases;②Lightstenosesgoup
5、,stenoses≥50%and<70%,54cases;③Severestenosesgroup,stenoses≥70%,74cases.(2)GroupsdividedintoinaccordwiththelocationofCAD:①Leftanteriordescendinggroup,45cases;②Leftcircumflexgroup,37group;③Rightcoronarygroup,46cases.(3)Groupsdividedintoinaccordwithinterve
6、ntiontime:①Beforeinterventiongroup,99cases;②Afterinterventiongroup,99cases.Investigatedtheinfluenceofstenoses、locationandinterventionofCADonQTdandQTcd.Results:Severestenoses(≥70%)significantlyinfluencedQTdandQTcd,p<0.05,andlightstenoses(≥50%and<70%)d
7、idn’tsignificantlyinfluenceQTdandQTcd,p>0.05;ThelocationofCADdidn’9tsignificantlyinfluenceQTdandQTcd,p>0.05.InterventionsignificantlyinfluencedQTdandQTcd,contrastedbeforewithafteroperation,p<0.05,andcontrastedafteroperationwithnostenosesgroup,p>
8、;0.05.Conclusion:SeverestenosesandinterventionsignificantlyinfluencedQTdandQTcd,andthelocationhardlyinfluencedQTdandQTcd.KeywordsCoronaryAngiographyElectrocardiogramQTDispersionQT离散度(QTd)是近年来发展起来的一项预测心脏复极同步的新
