男患,62岁,因心慌气促4小时入院。心电图示心房纤颤,心室率66次/分,频发室性早搏基本呈二联律。血检验:离子正常。静注利多卡因100 mg后以每分钟2mg速度持续静滴,同时口服扩血管药消心痛、心痛定等。用利多卡因6小时左右,患者自觉头晕、无力、气短。此时心电图仍示心房纤颤,室性早搏明显减少,但连续出现长R-R间期,最长达2.48秒,平均心室率36次/分。即停用利多卡因,予以肌 Male suffering, 62 years old, due to flustered four-hour admission gas. ECG showed atrial fibrillation, ventricular rate of 66 beats / min, frequent ventricular premature beats were basically dual law. Blood test: normal ion. Intravenous injection of lidocaine 100 mg per minute, 2mg speed intravenous infusion, while vasodilator oral anti-heartache, heartache and so on. About 6 hours with lidocaine, patients consciously dizzy, weakness, shortness of breath. At this time the ECG still shows atrial fibrillation, ventricular premature beats significantly reduced, but the continuous long R-R interval, up to 2.48 seconds, the average ventricular rate 36 beats / min. That is to disable lidocaine, to be muscle