Shen Song Yangxin Capsule can treat all kinds of arrhythmia, and has the effects of benefiting qi and nourishing yin, promoting blood circulation and dredging collaterals. This medicine is a representative medicine for arrhythmia, because it can treat both rapid arrhythmia and slow arrhythmia. Its principle is that Shen Song Yangxin Capsule locks the key point of treatment in the transition from "anti-rhythm" to "regulating rhythm", and plays a therapeutic role by regulating the function of the heart, so it can treat both slowly and quickly.