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目的 评价急性心肌梗死QT离散度与室性心律失常的关系。方法 测量 47例急性心肌梗死QT离散度 (QTd) ,计算校正QT离散度 (QTcd)。根据监护检出室性心律失常的情况分为三组 :Ⅰ组 :有恶性室性心律失常 ;Ⅱ组 :有潜在恶性室性心律正常 ;Ⅲ组 :无室性心律失常。比较QTd、QTcd与发生室性心律失常的关系。结果 QTd、QTcd在Ⅰ组、Ⅱ组、Ⅲ组分别为 (6 7 7± 18 7)ms和 (6 8 4±12 8)ms;(42 4± 13 2 )ms和 (5 0 8± 11 8)ms;(39 5± 16 8)ms和 (46 6± 15 1)ms。三组间差异极为显著。结论 急性心肌梗死患者QTd值越大 ,室性心律失常发生率越高。
Objective To evaluate the relationship between QT dispersion and ventricular arrhythmia in acute myocardial infarction. Methods QT Dispersion (QTd) was measured in 47 AMI patients and the corrected QT Dispersion (QTcd) was calculated. According to the monitoring of ventricular arrhythmias were divided into three groups: Ⅰ group: a malignant ventricular arrhythmia; Ⅱ group: a potential malignant ventricular arrhythmia; Ⅲ group: no ventricular arrhythmia. Compare QTd, QTcd with the occurrence of ventricular arrhythmias. Results QTd and QTcd were (67 7 ± 18 7) ms and (6 8 4 ± 12 8) ms in group Ⅰ, group Ⅱ and group Ⅲ, respectively 8) ms; (39 5 ± 16 8) ms and (46 6 ± 15 1) ms. The difference between the three groups is extremely significant. Conclusion The larger the QTd value in patients with acute myocardial infarction, the higher the incidence of ventricular arrhythmia.