ATRIAL OVERSENSING IN A DUAL-CHAMBER IMPLANTABLE CARDIOVERTER-DEFIBRILLATOR DUE TO ELECTROMECHANICAL LEAD INTERACTION

Recently, dual chamber implantable cardioverter-defibrillators have be en approved by the United States Food and Drug Administration and rele ased for the treatment of life-threatening ventricular tachyarrhythmia s. These devices offer increased sensing and detection capabilities as well as further discrimination between supraventricular and ventricul ar tachyarrhythmias. This paper describes a case report of atrial and ventricular lead interaction which resulted in atrial oversensing duri ng device implantation. Lead repositioning during the initial implant corrected the electromechanical noise created by this interaction and resulted in appropriate pacing, sensing and defibrillation capabilitie s of this newer implantable cardioverter-defibrillator. These more sop histicated devices will require more meticulous attentions to detail i n order to minimize pacemaker/defibrillator inappropriate interactions /malfunctions.