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本文观察了７７例急性心肌梗塞（ＡＭＩ）患者入院时和出院前ＱＴ离散（ＱＴｄ）变化以及８例住院期间猝死的ＡＭＩ患者ＱＴｄ改变，与正常人组和陈旧性心肌梗塞组比较，ＡＭＩ患者入院时平均ＱＴｄ明显大于正常人组和陈旧性心肌梗塞患者（Ｐ＜０．０１）；猝死的ＡＭＩ患者平均ＱＴｄ明显大于６９例有活ＡＭＩ患者；ＡＭＩ用者出院前平均ＱＴｄ较入院时减小（Ｐ＜０．０１）。提示ＡＭＩ患者入院时平均ＱＴｄ增大，猝死者平均ＱＴｄ增大更明显，且较存活者增大。连续观察ＡＭＩ患者急性期体表心电图ＱＴｄ变化，可为评价病情进展和治疗效果提供依据。
This study investigated the changes of QTd in 77 AMI patients with QTd changes at admission and before discharge and 8 patients with sudden death during hospitalization. Compared with normal subjects and patients with AMI, AMI patients were admitted to hospital The mean QTd was significantly greater in patients with AMI than in normal subjects and in patients with old myocardial infarction (P <0.01). The mean QTd was significantly greater in AMI patients than in 69 patients with AMI. The mean QTd before AMI was lower than that at admission P <0.01). Tip AMI patients on average QTd admission increased, sudden QDd average more significant increase, and increased compared with survivors. Continuously observing the QTd changes of the body surface electrocardiogram during the acute phase of AMI may provide a basis for evaluating the progress of the disease and the therapeutic effect.