患者男性,47岁。既往体健,系重体力劳动者。入院前2个月在骑车运输重物时被汽车撞伤,致颅骨骨折及胸部挫伤,经外院治疗后颅骨骨折愈合,但头晕、乏力、胸闷及心前区疼痛逐渐加重。曾做心电图提示窦性心动过缓,房性早搏、交界性逸搏及阵发性房颤.因治疗无效而转入我院.查体:体温36.7℃,脉搏50次/分,血压 Male patient, 47 years old. Past physical health, heavy manual workers. Two months before admission, she was hit by a car while riding a heavy bicycle for transport, causing skull fractures and contusion of the thorax. The skull fractures healed after treatment by the outpatient hospital. However, dizziness, fatigue, chest tightness and pain in the anterior heart region gradually aggravated. Had ECG prompted sinus bradycardia, atrial premature beats, borderline esophageal atrial fibrillation and rhythm .For treatment ineffective and transferred to our hospital. Physical examination: body temperature 36.7 ℃, pulse 50 beats / min, blood pressure