The generic name of cardioplegia is propafenone hydrochloride tablets, and its course of treatment should depend on the condition, and there is no absolute time limit. Propafenone hydrochloride belongs to class Ic antiarrhythmic drugs, clinically used for paroxysmal ventricular tachycardia and supraventricular tachycardia (including those with preexcitation syndrome). The duration of the drug should depend on the changes in the condition of the patient, most patients need to use the drug for about 1 week to 1 month, and can be considered to stop the drug after the heart rhythm returns to normal and there is no recurrence for a period of time. The adverse reactions of this product include dry mouth, numbness of tongue and lips, headache, dizziness, nausea, vomiting, constipation, etc. It is contraindicated for those who are allergic to this product, those who are in cardiogenic shock, those who have severe hypotension, and those who have double bundle branch conduction block. Please adhere to the medication under the guidance of the physician, and regular review, do not stop the drug, so as not to cause recurrence of the disease.