Arrhythmias are an important group of cardiovascular diseases. They can occur alone or in conjunction with other cardiovascular diseases. Mild arrhythmias that do not affect hemodynamics often show no clinical symptoms. Arrhythmias can cause a reduction in coronary artery blood flow. Although various arrhythmias can decrease coronary blood flow, they rarely cause myocardial ischemia. However, in patients with coronary heart disease, various arrhythmias can induce or exacerbate myocardial ischemia, primarily manifested as angina and shortness of breath. The function of Jiu Xin Wan is mainly to promote Qi circulation and blood flow, remove blood stasis, relieve pain, increase coronary blood flow, and alleviate angina. Therefore, it is acceptable to take Jiu Xin Wan for arrhythmias combined with myocardial ischemia, but it is not recommended for those without clinical symptoms.