Patent ID: 11878174
Assignee: PACESETTER, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 4:
5. A medical system, comprising:
one or more implantable electrodes that can be used for sensing and pacing;
a sensing circuit configured to sense a His intracardiac electrogram (IEGM) using at least one of the one or more implantable electrodes configured to be implanted in or proximate to a patient's His bundle;
one or more pulse generators configured to
selectively produce one or more pacing pulses that are to be delivered to the patient's His bundle using at least one of the one or more implantable electrodes configured to be implanted in or proximate to the patient's His bundle; and
selectively produce one or more ventricular pacing pulses that are to be delivered to the patient's right ventricle using at least one of the one or more implantable electrodes configured to be implanted in the patient's right ventricle; and

a controller configured to
cause sensing or pacing of the patient's right atrium to thereby sense or pace an atrial event;
determine whether a portion of the His IEGM exceeds a specified sense threshold within a specified window within an atrioventricular delay (AVD) following the sensed or paced atrial event;
detect an atrial signal component within the His IEGM based on whether it is determined that the portion of the His IEGM exceeds the specified sense threshold within the specified window within the AVD, wherein detection of the atrial signal component within the His IEGM is indicative of potential atrial oversensing; and
trigger ventricular pacing in response to the portion of the His IEGM exceeding the specified sense threshold within the AVD, or trigger ventricular pacing at an end of the AVD in response to no portion of the His IEGM exceeding the specified sense threshold within the AVD;
wherein the AVD comprises an extended AVD that is long enough to allow for intrinsic atrioventricular (AV) conduction within the AVD.