Viral myocarditis is a relatively common clinical condition because it often occurs in children and in the heart, and very few critical forms of viral myocarditis are life-threatening, so families are particularly worried about this disease. However, the vast majority of patients have a good prognosis and can even recover on their own. Ninety percent of these patients will develop arrhythmias during the course of the disease, the most common being premature ventricular contractions. If premature beats are still present after treatment of myocarditis, a regular ambulatory electrocardiogram can be done. For some symptomatic and frequent ventricular premature beats, if drug therapy is not satisfactory or if drug therapy is not tolerated, catheter ablation can be considered to seek a cure. The success rate is more than 90%.