运动负荷试验结果的QT离散度分析

ANALYSIS OF QT DISPERSION OF TREADMILL EXERCISE TEST RESULT

目的：探讨运动试验结果与ＱＴ离散度（ＱＴｄ）的关系。方法：分析和总结７０例活动平板运动试验阳性伴随及不伴室性心律失常患者（Ⅰ、Ⅱ组）运动前后的ＱＴｃｄ（校正的ＱＴｄ）变化，并与３５例阴性者（Ⅲ组）对照。结果：运动后各组间ＱＴｃｄ均有显著差异，在２个阳性组（Ⅰ、Ⅱ组）运动后均比运动前ＱＴｃｄ显著增加，且Ⅰ组增加幅度更大，达１４０８６％。结论：运动诱发心肌缺血，使心肌复极不均一，为室性心律失常发生提供条件。

bjective:To explore the relationship between the treadmill exercise test and the QT dispersion.Methods:Seventy patients with positive findings of the treadmill exercise test were divided into Group Ⅰ including those paticnts with arrhythmia and Group Ⅱ containing those without arrhythmia,and their corrected QT duration(QTcd) before and after the exercise was compared.Thirtyfive patients with negative findings were allocated into control group(Group Ⅲ).Results:QTcd after exercise was significantly different among the three groups.Although it was significantly increased in Group Ⅰ and Ⅱ after the exercise,QTcd markedly enhanced up to 14086% in Group Ⅰ.Conclusion:Myocardial ischaemia after treadmill test may induce myocardial dishomogeneity and may contribute to ventricular arrhythmias.Therefore,increased QTcd may be a valuable parameter for assessment of treadmill exercise test.