To evaluate the effectiveness and safety of catheter ablation of frequent symptomatic PVCs in the pediatric population as first-line therapy compared with antiarrhythmic drugs.

Inclusion Criteria:

• Symptomatic, frequent, premature ventricular complexes (more than 10,000 according to the 24 hour Holter ECG)

Exclusion Criteria:

• Antiarrhythmic therapy before inclusion Structural heart pathology requiring surgical correction; Premature ventricular complexes associated with structural heart disease; Previously performed radiofrequency ablation due to premature ventricular complexes.