Amiodarone is a broad-spectrum anti-arrhythmic drugs,has many pharmacological characteristics of independent,although department class III anti-arrhythmic drugs,but its effect on multiple ion channels are blocked ,at the same time is in the nature of class I and IV anti -arrhythmic drugs.In recent years the in-travenous amiodarone be well in treatment of refractory room on cardiac arrhythmia,refractory ventricular tachycardia,ventricular fibrillation in good curative effect.In this paper,the undergraduate course of 30 patients with arrhythmia intravenous amiodarone.It is presently as follows the treatment result record.