[An exceptional cause of automatic implantable defibrillator dysfunction].

Twiddler syndrome is an exceptional cause of dysfunction of cardiac prostheses resulting from a displacement of the probe either by deliberate or unconscious manipulation. We report the case of a man admitted for a respiratory arrest (ACR) caused by an extreme bradycardia. Initially implanted 6 weeks earlier for idiopathic ventricular fibrillation without documented ischemic causes or major conduction disorders. The patient has benefited from extraction with reimplantation of a new defibrillation probe. The originality of this observation is underlined by the occurrence of a previously unrecognized inaugural syncopal atrioventricular block revealing Twiddler syndrome in a patient initially implanted with a secondary prevention defibrillator for idiopathic ventricular fibrillation.