异常Q波(指Q波的宽度≥0.04秒,Q波的深度≥同导联R波的1/4,或在不应出现Q波的导联出现0波,以下简称异Q)是心肌梗塞的典型心电图表现,但不是心肌梗塞独有的心电图表现。为了避免对非冠状动脉病变所引起的异Q造成误诊,本文将我院碰到的3例心外因素引起的异Q报道如下,并结合文献就其产生机理加以讨论。病例资料例1 男,28岁,住院号790098。因畏寒、发热、咳嗽、胸痛5天于1979年1月8日入院。体检:体温38.7℃,心率118次/分,律齐,心界不扩大,无杂音,右上肺呼吸音减弱,叩诊浊音。胸透右上肺野呈密度增高的均匀阴影,诊断右上肺大叶性肺炎。经 Abnormal Q wave (referring to the Q wave width ≥ 0.04 seconds, the depth of Q wave ≥ 1 of the same lead R wave, or in the wave should not appear Q wave 0 wave, hereinafter referred to as Q) is myocardial infarction The typical ECG performance, but not unique myocardial infarction ECG performance. In order to avoid the misdiagnosis caused by abnormal Q caused by non-coronary artery disease, this paper reports the different Q caused by extracardiac factors in our hospital as follows, and discusses its mechanism in combination with the literature. Case data 1 male, 28 years old, hospital number 790098. Due to chills, fever, cough, chest pain for 5 days in January 8, 1979 admission. Physical examination: body temperature 38.7 ℃, heart rate 118 beats / min, law Qi, the heart does not expand, no noise, right lung breath sounds weakened, percussion dullness. Chest thoracic right upper lung field was uniform shadow of increased density, diagnosis of right upper lobe pneumonia. through