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Failure of Transvenous ICD to Terminate Ventricular Fibrillation in a Patient with Left Ventricular Noncompaction and Polycystic Kidneys

Implantable cardioverter defibrillator (ICD) testing in patients with left ventricular noncompaction (LVNC) at the time of implantation and potential difficulties with ventricular fibrillation (VF) induction/termination in LVNC patients are often not stated in the literature. This report describes the failure of transvenous implantation of an ICD in a 40‐year‐old patient with LVNC and polycystic kidneys. A high defibrillation threshold (DFT) prevented termination of ICD‐induced VF. This case suggests that DFT testing should be considered in any LVNC patient during ICD implantation. The association of LVNC and polycystic kidneys is also discussed. PACE 2012; 35:e40–e42)