Implantable cardioverter defibrillators have become an integral part of treatment of patients with malignant chamber arrhythmias over last 10 years both in secondary and primary prevention of sudden deaths. Based on monitoring of a group of 182 patients and based on information in literature, authors present a survey of the most frequent situations, rules and complications related to therapy with implantable defibrillators. In the end they try to answer summary of the most frequent questions of internal medicine physicians and GPs concerning patients with this implanted device.

        Key words: Implantable cardioverter defibrillator - Inappropriate treatment - Arrhythmia storm - Antiarrhythmia therapy - Electromagnetic interference