大量胸腔积液挤压心脏引起心脏移位或心脏被掩盖 ,导致心电图ＱＲＳ振幅降低或呈阶梯现象很常见。但以ＱＲＳ沿着基线发生尖端扭转为表现的电交替却很罕见 ,现就遇见的1例报告如下。患者男 ,5 3岁 ,农民。发热、胸痛 2 0ｄ ,呼吸困难 1Ｗ入院。 2 0ｄ前突然发热 ,体温 3 8℃ , A large number of pleural effusion squeeze the heart cause heart displacement or heart is covered, resulting in ECG QRS amplitude decreased or ladder is very common. However, the QRS along the baseline torsion twisting performance for the electric alternating is very rare, now met one case reported as follows. Patient male, 5 3 years old, farmer. Fever, chest pain 20d, 1W dyspnea admitted to hospital. 2 0d suddenly before the fever, body temperature 38 ℃,