We present the case of a 63-year-old female patient who Test Kits presented to the pacemaker clinic for a scheduled interrogation of her leadless pacemaker.The device interrogation was suggestive of intermittent under-sensing with failure to pace.Connecting the electrocardiogram lead to the pacing system analyzer raised the Rear Cinch suspicion of intermittent loss of telemetry data.
(Level of Difficulty: Beginner.).