急性心肌梗塞患者最大QT_c间期、QT离散度与恶性心律失常的关系

Correlation Between Maximal QT c Interval, QT Dispersion and Malignant Arrhythmia in Patients with Acute Myocardial Infarction

为探讨急性心肌梗塞（ＡＭＩ）患者最大校正ＱＴ间期（ＱＴｃｍａｘ）、ＱＴ离散度（ＱＴｄ）和ＱＴｃ离散度（ＱＴｃｄ）与恶性心律失常的关系，回顾性分析了４７例ＡＭＩ患者（分为恶性心律失常组１４例和无室性心律失常组３３例）发病３ｄ内的心电图，并以５０例健康人作对照。结果显示：两组ＡＭＩ患者的ＱＴｃｍａｘ、ＱＴｄ和ＱＴｃｄ均显著大于对照组（Ｐ＜０００１），而恶性心律失常组的上述指标比无室性心律失常组显著增大（Ｐ＜００５～０．００１）。提示ＱＴｃｍａｘ延长和ＱＴｄ、ＱＴｃｄ增大与ＡＭＩ患者恶性心律失常的发生密切相关，测定上述指标对ＡＭＩ近期预后的判断有一定价值。

In order to study the relationship between maximal QT c interral (QT c max ),QT dispersion (QT d), QT c dispersion (QT cd ) and malignant arrhythmia in patients with acute myocardial infarction (AMI), retrospective analysis of ECG within 3 days of onset in 47 patients with AMI were performed, 50 normal subjects served as control. The results showed that QT c max , QT d and QT cd in patients with AMI were greater significantly than that in the control group. And that in malignant arrhythmia group were also greater significantly than that in non-ventricular arrhythmia group. These results suggested that prolonged QT c max , increased QT d and QT cd may be related to malignant arrhythmia of AMI. Measurement of these indexes may be useful for judgment of prognosis of patients at early stage of AMI.