摘要
为评价Q-T_c离散度(Q-T_(cd))的临床意义,观察100例正常人,50例冠心病和50例高血压心脏病患者12导联ECG的Q-T_(cd)。发现正常组男、女之间Q-T_c有显著性差异(P<0.001),平均女比男长18ms;但Q-T_(cd)无显著性差异(P>0.05)。冠心组和高心组的Q-T_(cmin)接近于正常组(395.9±24.6ms),而Q-T_(cmax)则均明显大于正常组(418.5±24.7ms);Q-T_(cd)冠心组和高心组(50.3±17.0ms、48.1±18.3ms)明显大于正常组(22.7±8.1ms,P<0.001)。在正常组由X、Y、Z导联测得的Q-T_(cd)(15.7±11.4ms)比12导联测值偏小。Q-T_(cd)增大多见于VCG中T环呈圆形或马蹄形患者,冠心组中有24例,其Q-T_(cd)平均达63.0±12.7ms。认为Q-T_d增大是预告严重室性心律失常简明有用的指标。
Author observed Q-Tc dispersion (Q-Tcd) shown in 12-lead ECG of 100 normal individuals, 50 cases of coronary artery disease (CAD) and 50 cases of hypertensive heart disease (HHD) in order to correctly assess clinical value of Q-Tcd. Results showed that Q-Tc of female were longer than that of male ( P < 0. 001) with extra length of 18ms and the Q-Tcmin of CAD and HHD were similar to those of normal Chinese (395. 9 ±24. 6ms), but Q-Tcmax of CAD and HHD were greater than that of normal (418. 5±24. 7ms). Q-Tcd were greater in patients with CAD (Q-Tcd50.3±17. Oms) and patients with HHD (Q-Tcd48.1±18. 3ms) than those of normal subjects (Q-Tcd22.7±8. 1ms, P <0. 001). Q-Tcd from X,Y,Z leads (15.7±11.4ms) was smaller than that measured by 12 lead ECG in normal group. Greater Q-Tcd were often seen in circular or horse-shoe shape TsE loop in VCG patients. In 24 cases with CAD, their Q-Tcd mean was 63. 0±12. 7ms. These results demonstrated that increased Q-Tcd was a simple and useful index for prediction of severe ventricular arrhythmia.
出处
《心电学杂志》
1997年第1期12-14,共3页
Journal of Electrocardiology(China)
关键词
心电图
Q-T离散度
冠心病
高血压心脏病
Electrocardiography Q-T dispersion Coronary heart disease Hypertension heart disease