心率变异、心室晚电位和Q-T离散度预测急性心肌梗死预后的探讨

目的 了解心率变异（ＨＲＶ）、Ｑ－Ｔ离散度（Ｑ－Ｔｄ）和心室晚电位（ＶＬＰ）在预测急性心肌梗死９ＡＭＩ）预后的价值。方法 ４０例ＡＭＩ患者ＨＲＶ（ＳＤＮＮ）、Ｑ－Ｔ、ＶＬＰ测定，与４０例正常人进行对比分析。结果人ＡＭＩ组ＳＤＮＮ与对照组比较明显减低（Ｐ〈０．００１），Ｑ－Ｔｄ明显延长（Ｐ〈０．００１），ＶＬＰ阳性率明显增高（Ｐ〈０．０１）。梗死患者室性心律失常事件组与非事件组ＨＲＶ（ＳＤＮＮ）、Ｑ

Prognostic value of heart rate variability,ventricular late potential and Q-T dispersion for the prediction of acute myocardial infarction

Objective To detrmine the prognostic value of heart rate variability(HRV),ventricular late potential(VLP)and Q T dispersion for the prediction of acute myocardial infarction(AMI).Methods HRV (SDNN),Q T and VLP in 40 cases of AMI were detected and analysed in contrast with 40 normal subjects.Results SDNN in AMI group was obviously lower than that in control group(P<0.001);Q Td was obviously prolonged(P<0.001) and positive rate of VLP was remarkably increased(P<0.01).All the indices in ventricular arrhythmias event group indicated great difference from those of nonevent group(P<0.005).As far as the prediction for ventricular arrhythmia event of AMI was concerned,SDNN showed the highest specificity,Q Td indicated the best efficiency and VLP had the strongest sensibility.Conclusions HRV,VLP and Q Td all have specific prediction values for ventricular arrhythmia events,and if these indices are detected at the same time the value of these indices will be increased and more reliable.