Late dofetilide-associated life-threatening proarrhythmia

This report is about a 62-year old male patient with an implantable cardioverter defibrillator (ICD) for patient activated termination of atrial fibrillation who experienced dofetilide-associated ventricular tachyarrhythmias and ICD-induced ventricular fibrillation six months after the initiation of the antiarrhythmic drug therapy.