The ablation of supraventricular tachycardias is a curative procedure with high success rates. Due to considerably improvement of quality of life, it becomes the therapy of first choice in nearly all kinds of symptomatic supraventricular reentry tachycardias. Following the guidelines for the management of patients with atrial fibrillation, pulmonary vein isolation is still second choice of therapy after ineffective medical treatment. In experienced electrophysiological centres a complication rate of < 2% and an intention to treat mortality of < 0.1% can be expected.