急性心肌梗塞泵衰竭患者QT离散变化及其临床意义

Changes of QT Dispersion in Patients with Acute Myocardial Infarction Complicating Pump Failure and its Clinical Significance

探讨老年急性心肌梗塞（ＡＭＩ）患者ＱＴ离散度（ＱＴｄ）、ＱＴｃ离散度（ＱＴｃｄ）与泵衰竭的关系。方法６１例老年ＡＭＩ患者分为两组：泵衰竭组（Ｋｉｌｉｐ分级泵功能≥Ⅲ级者，ｎ＝２１）和对照组（Ｋｉｌｉｐ分级泵功能Ⅰ级者，ｎ＝４０）。分析患者入院时心电图的ＱＴｄ和ＱＴｃｄ。结果：ＱＴｄ、ＱＴｃｄ在泵衰竭组分别为（６４６±１６０１）ｍｓ和（７７３３±２０６０）ｍｓ，在对照组分别为（５２７５±１４５０）ｍｓ和（６０９８±１５９３）ｍｓ，二组间比较差异有显著性（Ｐ＜００５）。结论：ＱＴｄ和ＱＴｃｄ增大与ＡＭＩ患者的泵衰竭有关。

Objective: To detect relationship between QT dispersion (QTd), QTc dispersion (QTcd) and pump failure in aged patients with acute myocardial infarction (AMI). Methods: 61 aged patients with AMI were divieded into two groups; pump failure group (killip′s degree Ⅲ or more, n =21) and control group (killip′s degree Ⅰ, n =40). QTd and QTcd shown in electrocardiogram were analyzed. Results:QTd and QTcd in pump failure group were significantly greater compared to those in control group (QTd mean(64.76±16 01) ms vs (52.75±14.50) ms, P <0 05; QTcd mean (77.33±20.60) ms vs (60 98±15 9) ms, P <0 01) Conclusion: Increasing QTd and QTcd in patients with AMI were related to pump failure. QTd and QTcd might serve as indicators to assess pump function and prognosis of aged patients at early stage of AMI.