Abnormal Cellular Repolarization due to Implantable Cardioverter Defibrillator Shock: A Case Report

Implantable cardioverter-defibrillators (ICDs) have a considerable impact on the therapy of patients with threatening ventricular arrhythmias, significantly reducing the risk of sudden death. Even though newest devices have achieved a remarkable reliability, the delivery of inappropriate shocks is still possible. In this paper a singular case of T-wave oversensing is described, associated with a high number of inappropriate shocks and consequent rapid depletion of ICD battery. Persistent abnormalities of cellular repolarization following a first appropriate shock were believed to be at the origin of T-wave oversensing. J Med Cases. 2014;5(2):92-97 doi: http://dx.doi.org/10.14740/jmc1642w