Newer devices incorporate advanced algorithms to have more accurate delivery of implantable cardioverter‐defibrillator (ICD) therapy. Newer models of Abbott Implantable cardioverter‐defibrillators like Gallant and Entrant have a new ventricular fibrillation (VF) therapy assurance algorithm. This algorithm has a proven role in avoiding under‐detection of VF where some of the smaller electrograms are under‐sensed. We report a case of ventricular fibrillation therapy assurance (VFTA) algorithm malfunction in a 48‐year‐old lady having single chamber Entrant Implantable cardioverter‐defibrillator, where the patient received inappropriate therapies. The VFTA algorithm eventually had to be turned off.

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