摘要
目的探讨冠状动脉移植术对Q_T离散度 (Q_Td)的影响及Q_Td 与术后心律失常的关系。方法对87例冠状动脉移植术患者 (分成Ⅰ组65例 :术后无心律失常 ;Ⅱ组12例 :术后伴室性心律失常 ;Ⅲ组10例 :术后伴房性心律失常 )术前术后Q_T离散度进行分析。结果3组Q_Tmax、Q_Tcd、Q_Td 在术前、术后3天差异均有显著性意义 (P均<0.05)。在术前 ,术后3天、1周 ,室性心律失常组Q_Td 均高于正常 ,而无心律失常组和房性心律失常组基本正常。术后2周室性心律失常组Q_Td 也已降至正常 ,此时3组的Q_Td 与术前相比差异均有显著性意义 (P<0.05)。Q_Td 和ST_T改变呈显著正相关 (P<0.05) ,且与室性心律失常的发生呈非常显著正相关 (P<0.01)。结论Q_Td 一定程度上反映心肌缺血的程度 ,可作为冠状动脉移植术后心肌血供改善的一个指标。Q_Td 增大对心律失常及猝死有一定预测作用。
Objective In order to investigate influence of coronary artery bypass graft(CABG) on Q _ T dispersion(Q _ T d) and relationship between Q _ T d and arrhymia.Methods Observed 87 consecutives patients underwent coronary artery bypass graft.Eighty_seven patients were divided into three groups:Group 1(n=65),had no arrhymia postoperatively;group2(n=12),had ventricular arrhymia postoperatively;group3(n=10),had atrium arrhymia postoperatively.Results There were significant differences of Q _ T max,Q _ T cd and Q _ T d in three days afters CABG compared to these before CABG(P<0.05).Q _ T dwas higher than normal before operation,three days and one week after operation in group 3 and were normal in group1 and group2.Q _ T d in Group 3 had decreased to normal and in three groups had decreased significantly in two weeks after CABG.There were a positive correlation between Q _ T d and ST _ T(P<0.05)、Q _ T d and ventricular arrhymia(P<0.01).Conclusion Q _ T d might indicate degree of myocardial ischemia,and might be an index of improvement of myocardial blood supply after CABG and might predict ventricular arrhymia and sudden death.
出处
《心电学杂志》
2001年第2期70-72,共3页
Journal of Electrocardiology(China)
