急性心肌梗死Q-T及J-T离散度与室性心律失常的关系

Relationship between Q-T dispersion, J-T dispersion of acute myocardial infarction and ventricular arrhythmia

为评价Q-T_d、J-T_d对急性心肌梗死患者发生恶性心律失常的预测价值,观察82例急性心肌梗死患者恶性室性心律失常与Q-T_d、J-T_d的关系。结果显示Q-T_d、J-T_d在恶性室性心律失常组分别为99.47±20.13ms、97.89±21.75ms;潜在恶性室性心律失常组为67.39±14.21ms、61.74±15.57ms;无室性心律失常组为48.75±29.93ms、43.25±22.46ms。3组间差异极为显著(P<0.01),Q-T_d(J-T_d)≥100ms者全部发生恶性室性心律失常。认为Q-T_d(J-T_d)值越大,室性心律失常的发生率越高;梗死早期Q-T_d(J-T_d)值增大>60ms可作为预测恶性室性心律失常发生的一项敏感指标。

In order to assess predictive value of Q-Td, J-Td in patients with acute myocardial infarction during malignant ventricular arrhythmia, we observed relationship between malignant ventricular arrhythmia and Q-Td, J-Td in 82 patients with acute myocardial infarction. Results showed that Q-Td and J-Td were respectively 99. 47±20. 13ms, 97. 89±21. 75ms in malignant ventricular arrhythmia group, 67. 39±14. 21ms, 61.74± 15. 57ms in latent malignant ventricular arrhythmiagroup and 48. 75±29. 93ms, 43. 25±22. 46ms in non-ventricular arrhythmia group with significant difference among three groups ( P<0. 01): When Q-Td or J-Td ≥100ms, all patients had malignant ventricular arrhythmia. We think that more freqently patients with higher Q-Td or J-Td will be attacked by malignant ven-tricuar arrythmia. If Q-Td or J-Td at early stage of AMI goes up to >60ms, it might serve as a sensitive indicator in predication of forthcoming malignant ventricular arrhythmia.