Postoperative arrhythmias in tetralogy of Fallot.

common congenital cyanotic heart disease, but it can now be treated with very good long term results. It has been known for many years, however, that patients with surgically treated TF are at risk of sudden cardiac death even many years later, while a large number of these patients exhibit postoperative arrhythmias. What is not entirely clear is the relation between ventricular arrhythmias detected during routine examinations (ECG, Holter) or induced during an electrophysiological study and the risk of sudden cardiac death. Furthermore, it has become apparent that these patients may suffer from supraventricular arrhythmias at least as often as ventricular arrhythmias. Those arrhythmias also require attention and treatment since they may cause significant morbidity and mortality.