冠心病Q-T及J-T离散度与室性心律失常的关系

Relationship between Q-Td and J-Td, and ventricular arrhythmia in patients with coronary heart disease

为评价冠心病Q-T_d及J-T_d与室性心律失常的关系,根据Lown分级对161例冠心病室性心律失常患者的Q-T_d及J-T_d进行分析,并与40例正常人作对照。结果显示:(1)对照组Q-T_d为41.5±14.9ms,J-T_d为34.8±14.0ms,无性别差异。(2)随室性期前收缩级别的增加,Q-T_d及J-T_d逐渐延长。(3)在预测室性心律失常发生方面,J-T_d比Q-T_d敏感。(4)频发室性期前收缩和成对期前收缩者Q-T_c及J-T_c较长。认为Q-T_d及J-T_d对复杂室性心律失常的发生有较高的预测价值,且J-T_d比Q-T_d敏感。

In order to explore relationship between Q-Td and J-Td, and ventricular arrhythmia in patients with coronary heart disease (CHD), authors analyzed Q-Td and J-Td in 161 patients with ventricular arrhythmia and 40 normal subjects according to Lown's grade. Results showed: (1) In normal subjects, average Q-Td ammounted to 41. 5±14. 9ms and J-Td to 34. 8±14. 0ms, with no significant difference in sexes;(2) With rising of grade of ventricular extrasystole (VES), Q-Td and J-Td extended gradually; (3) J-Td was more sensitive than Q-Td in predicting ventricular arrhythmia;(4) Q-Tc and J-Tc were longer in groups offrequent VES and VES couplets and short-run ventricular tachycardias than in others. Authons maintain that Q-Td and J-Td have higher value in predicting complex ventricukr extrasystole, and J-Td was proved more. sensitive than Q-Td.