患者男性，25岁。自觉胸闷、气短、阵发性心慌2月余。外院曾因心电图ST－T略有下移和T波低平及病人反映出的自觉症状，在没有其它临床资料及心电国反复对比观察的情况下诊断为心肌炎，在长时间治疗无效后，来我院就诊。在较长时间心电图记录观察中，QRS波样表现出两种形态。以 Male patient, 25 years old. Conscious chest tightness, shortness of breath, paroxysmal palpitation more than 2 months. Outside the hospital had ECG ST-T slightly down and T wave low level and the patient’s symptoms reflected in the absence of other clinical data and ECG comparative observation of the case of repeated diagnosis of myocarditis, after a long period of ineffective treatment, Come to our hospital. In longer time ECG recording observation, QRS waveforms showed two forms. To