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为了解Q-T离散度对急性心肌梗死的应用价值,测定146例急性心肌梗死患者入院3h内标准12导联ECG心率校正Q-T离散度(Q-T_(cd))。结果显示:(1)心源性死亡组与未死亡组,二尖瓣A峰速度与E峰速度比值(A/E)≥1组与A/E<1组或左心室射血分数(EF)≤45％组与EF>45％组的Q-T_(cd)差异均无显著意义(P>0.05);(2)持续性室性心动过速或心室颤动阳性组的Q-T_(cd)显著高于阴性组(82.6±26.6ms与66.8±33.5ms,P<0.05)。提示:(1)Q-T离散度与心源性死亡、心脏收缩和舒张功能无关,(2)Q-T离散度与持续性室性心动过速、心室颤动的发生有关,可以作为急性心肌梗死患者严重室性心律失常的预测指标。
To understand the value of Q-T dispersion in acute myocardial infarction, Q-T dispersion (Q-T_ (cd)) of standard 12-lead ECG was corrected within 3 hours after admission to 146 patients with acute myocardial infarction. The results showed that: (1) The ratio of mitral A peak velocity to E peak velocity (A / E) ≥ 1 group and A / E <1 group or left ventricular ejection fraction (EF) (P> 0.05). (2) The Q-T_ (cd) in patients with persistent ventricular tachycardia or ventricular fibrillation was significantly lower ) Was significantly higher than that in the negative group (82.6 ± 26.6 ms vs 66.8 ± 33.5 ms, P <0.05). (1) QT dispersion has nothing to do with cardiac death, cardiac systolic and diastolic function, (2) QT dispersion is associated with the occurrence of persistent ventricular tachycardia and ventricular fibrillation, and can be used as a serious compartment of patients with acute myocardial infarction Predictors of arrhythmia.