Cardioplegia is a commonly used antiarrhythmic drug, but long-term use is not recommended. Cardioplegia belongs to the vinyl class of antiarrhythmic drugs, for patients with organic heart disease, often aggravate the burden on the heart, resulting in reduced cardiac function. For patients without organic heart disease, cardioplegia can be taken for a period of time, and then adjust the medication. Heart disease is often a chronic progressive disease, so cardioplegia is not recommended for long-term use. Patients with arrhythmia can take any of the four major classes of antiarrhythmic drugs, or a combination of different antiarrhythmic drugs, but it is recommended that the drugs that can be used for a long period of time include drugs such as β-blockers, which have fewer side effects, but it is important to pay attention to monitoring the heart rate and the incidence of adverse effects, such as low blood pressure, fatigue, panic attacks, and other symptoms occurring.