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目的 :观察 QT间期离散度 (QTd)在老年急性心肌梗死 (AMI)再通前后的变化。方法 :测量和计算 16 5例老年 AMI患者及 40例正常老年人 QT间期、QTd和校正后 QTd(QTdc)。结果 :老年 AMI患者 QTdc显著长于对照组 (P<0 .0 1) ;AMI患者发生室性心律失常及死亡者的 QTdc明显长于未发生者 (P<0 .0 5 ) ;溶栓或 PTCA术后QTdc显著降低 (P<0 .0 1)。结论 :QTdc与心肌梗死严重性间存在一定相关性 ,QTdc可以作为观察早期溶栓和PTCA术是否成功的间接指标
Objective: To observe the change of QTd before and after recanalization of senile acute myocardial infarction (AMI). Methods: QT interval, QTd and QTd (QTdc) were measured and calculated in 16 5 elderly patients with AMI and 40 normal controls. Results: The QTdc of elderly patients with AMI was significantly longer than that of the control group (P <0.01). The incidences of ventricular arrhythmias and death in those with AMI were significantly longer than those without (P <0.05); thrombolysis or PTCA After QTdc was significantly lower (P <0.01). Conclusion: QTdc has some correlation with the severity of myocardial infarction. QTdc can be used as an indirect indicator to observe the success of early thrombolysis and PTCA