QRS波群碎裂指QRS波群形态(<120ms)转变为不同的RSR’形式:额外R波、S波切迹或>1个R’波。有关其预后价值的资料很少。本研究拟在350例首发Q波心肌梗死(MI)的患者中,评估Q波和QRS波群碎裂对于再发心脏事件的预测价值;再发心脏事件指心脏性死亡、非致死性MI或不稳定型心绞痛(无论哪一个首先发生)。随访(平均2个月)心电图(ECG)显示, QRS complex fragmentation refers to the transformation of the QRS complex (<120ms) into different RSR ’forms: additional R waves, S-wave notch or> 1 R’ wave. Few information about the prognostic value. This study was intended to evaluate the predictive value of Q wave and QRS complex for the prediction of recurrent cardiac events in 350 patients with first-onset Q-wave myocardial infarction (MI); recurrent cardiac events were cardiac death, non-fatal MI or Unstable angina (whichever occurs first). Follow-up (mean 2 months) Electrocardiogram (ECG)