论文部分内容阅读
目的 探讨急性心肌梗塞（ Ａ Ｍ Ｉ） Ｑ Ｔ 离散度对严重心律失常的发生、猝 死、心功能损害的严重程 度及预后的影响。方法 将病人分为心律失常组、心衰组与无严重事件组， 对各组病人入院时首次心电图 Ｑ Ｔ 间期及有关参数进行分析研究。结果 心律失常组、心衰组 Ｑ Ｔｄ 、 Ｑ Ｔｃｄ 均较无严重事件组显著延长；严重事件组死亡的１４ 例与无严重事件组比较， Ｑ Ｔｄ 、 Ｑ Ｔｃｄ进一步增加，分别是（４９ ±１５ Ｖ Ｓ ７５ ±１８ ，５５ ±１７ Ｖ Ｓ９２ ±２５ ｍｓ ， Ｐ ＜０００１） 。结论 以上结果表明， Ｑ Ｔｄ 、 Ｑ Ｔｃｄ 所反映的心脏局部复极不均一性和电不稳定性的程度，可能对 Ａ Ｍ Ｉ 急性期严重心律失常、心功能损害的程度及预后有一定的影响。
Objective To investigate the influence of Q T dispersion of Acute Myocardial Infarction (A M I) on the occurrence of severe arrhythmia, sudden death, severity of cardiac dysfunction and prognosis. Methods The patients were divided into arrhythmia group, heart failure group and no serious event group. The first QT interval and the related parameters of each group were analyzed. Results The Q Td and Q Tcd in the arrhythmia group and the heart failure group were significantly longer than those in the non-severe event group. Compared with the non-severe event group, the Q Td and Q Tcd in the severe event group were further increased (49 ± 15 V S 75 ± 18, 55 ± 17 V S92 ± 25 ms, P <0001). Conclusions The above results indicate that the degree of local repolarization heterogeneity and electrical instability induced by Q Td and Q Tcd may have a certain impact on the severity of acute cardiac arrhythmia, cardiac dysfunction and prognosis in AMI .