MODE SWITCHING BY A VENTRICULAR LEADLESS PACING DEVICE

摘要

In some examples, a leadless pacing device (hereinafter, “LPD”) is configured for implantation in a ventricle of a heart of a patient, and is configured to switch between an atrio-ventricular synchronous pacing mode and an asynchronous ventricular pacing mode in response to detection of one or more sensing events, which may be, for example, undersensing events. In some examples, an LPD is configured to switch from a sensing without pacing mode to an atrio-ventricular synchronous pacing mode in response to determining, for a threshold number of cardiac cycles, a ventricular depolarization was not detected within a ventricular event detection window that begins at an atrial activation event.

主权项

1. A method comprising:
receiving, by a processing module, an electrical cardiac signal sensed by a leadless pacing device while the leadless pacing device is in an atrio-ventricular synchronous pacing mode; detecting, by a processing module, a first atrial activation event; determining, by a processing module and based on the electrical cardiac signal, a second atrial activation event was not detected within a detection window that begins at the first atrial activation event; and controlling, by the processing module, the leadless pacing device to deliver pacing pulses to a ventricle of a patient according to an asynchronous ventricular pacing mode based on the determination that the second atrial activation event was not detected within the detection window.