急性心肌梗塞后QT离散度改变及临床意义

分析了６６例急性心肌梗塞（ＡＭＩ）病人的ＱＴ间期，ＱＴｃ离散度（ＱＴｃｄ），ＪＴｃ离散度（ＪＴｃｄ）ＱＲＳ离散度（ＱＲＳｄ）的变化。结果显示除ＱＴｃｍｉｎ，ＱＲＳｄ外ＱＴｃｍａｘ，ＱＴｃｄ，ＪＴｏｄ在ＡＭＩ后４８小时内均显著增加；第２周显著降低（Ｐ〈０．０１），其中溶栓治疗再灌注组国无灌注和非溶有下降更为显著（Ｐ〈０．０１）；第３～４周再灌注组明显回升（Ｐ〈０．０１），无再灌注和非溶栓组则无变化，

QT Interval Dispersion in Patients with Acute Myocardial Infarction

To assess the clinical value of QTc-interval dispersion (QTcd ) in acute myocardial infarction (AMI), the changes of QTcd and some in fluential factors were investigated in 66 patients with AMI. The results were as folows: 1) QTcd in all patients was significantly higher than the normal leve within 48 hours post-myocardial infarction and markedly decreased in two weeds (P > 0. 01 ); 2) QTcd in thrombolytic therapy with reperfusion group was significant lower than that in without reperfusion group and in non-thrombolytic therapy group; 3) Serious increasing of QTcd mainly appeared in the patients with ventricular fibrillation (VF), tachycardia (VT) or VLP +. The findings suggested that there is marked dispersion of repolarization at the early stage of AMI, it might have some relationship to VF / VT and reflect the efficiency of thrombolytic therapy.