Heart Stabilizing Granules are composed of Radix Codonopsis Pilosulae, Radix et Rhizoma Polygonati, Radix Panax Ginseng, Amber and Glycyrrhiza Uralensis. It has the effect of benefiting Qi and nourishing Yin, activating blood circulation and resolving blood stasis. It is used for palpitations, shortness of breath, chest pain due to Qi and Yin deficiency and stagnation of heart veins; premature ventricular contractions and premature atrial contractions with the above symptoms. Through the analysis of ingredients, it is found that Radix et Rhizoma Ginseng nourishes the spleen qi, generates heart qi, and energizes the heart qi; Huang Jing nourishes the heart yin, astringes yin and calms the mind, Radix et Rhizoma Ginseng is combined with Huang Jing to benefit the qi and nourish yin. Amber calms the heart and tranquilizes the mind, Panax ginseng invigorates blood circulation and dispels blood stasis, and Gangsong opens the orifice and awakens the spleen. The above-mentioned drugs work together to benefit the heart qi, nourish the heart yin, open the heart chakra and calm the mind. Animal experiments have shown that Heart Stabilizing Granules can reduce the incidence of arrhythmia by enhancing the post-transcriptional inhibitory activity of certain enzymes and decreasing the expression of gap junction protein in ventricular myocytes; in electrophysiology, it can achieve the effect of treating arrhythmia by prolonging the action potential duration and inhibiting the triggering activity of ischemic foci. It has been widely used in the treatment of arrhythmias such as premature beats, supraventricular tachycardia and atrial fibrillation, and its efficacy has been fully recognized.