The interval plot suggests a lead failure (short cycles, intermittently sensed throughout the intrinsic cardiac cycle, extremely variable amplitude with some signals saturating the sensing amplifiers). The LIA algorithm is based on an intermittent detection, throughout the cardiac cycle, and cycle to cycle variation of the extracardiac signals, associated with lead failure. The remedy is to increase the number of cycles needed to a) detect VF and b) start the charge of the capacitors. In this asymptomatic patient, the combination of remote monitoring and programming of the LIA enabled an early diagnosis of the lead failure and prevent the delivery of inappropriate shocks. However, this was a temporary fix and the implantation of a new RV lead was urgent.