PREMATURE ICD BATTERY DEPLETION DUE TO A DEFECTIVE LEAD ADAPTER COMPONENT - USEFULNESS OF EXTENSIVE DATA LOGGING

Usefulness of Extensive Data Logging. Described herein is the usefulne ss of extensive data logging third generation ICDs in a patient with p remature ICD battery depletion due to a defective pace/sensing lead co mponent. Due to noise artifacts, VT/VF detections occurred leading to inappropriate patient shock discharges and 2,267 internal charge dumps within 2 weeks. During manual manipulations at the ICD site, real-tim e intracardiac electrocardiogram and event markers revealed noise arti facts that were interpreted as VT/VF. Radiography confirmed slight mov ement of the pace/sensing lead pin out of the Y-adapter. Therefore, th e design of adapter systems without screw fixation should be reviewed to ensure lead integrity. In the case of sudden increases in VT/VF rec ognition, defective sensing components must be considered.