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US 2026/0216520 A1Published application
Ventricular sensing control in a cardiac pacing system
AssigneeMedtronic, Inc.
InventorsMaureen E. LYBARGER, Jian CAO, Wade M. DEMMER, Michael W. HEINKS, Jean E. HUDSON, Michael KEMMERER, James J. ST. MARTIN, Todd J. SHELDON
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Abstract
A medical device is configured to set a post-atrial time interval in response to an atrial event and generate an event time signal in response to a ventricular electrical signal crossing an R-wave sensing threshold during the post-atrial time interval. The device accumulates oversensing evidence in response to the event time signal and adjusts a ventricular sensing control parameter based on the accumulated oversensing evidence in some examples.
Claims21
1-20. (canceled)
A medical device, comprising:
- a housing enclosing therapy delivery circuitry, sensing circuitry and control circuitry;
- a plurality of electrodes carried by the housing and comprising a ventricular electrode pair and an atrial electrode pair different than the ventricular electrode pair;
- wherein the sensing circuitry and the control circuitry are configured to:
- sense, via the atrial electrode pair, a first cardiac electrical signal and first event signals in the first cardiac electrical signal;
- sense, via the ventricular electrode pair, a second cardiac electrical signal and second event signals in the second cardiac electrical signal;
- enable post-atrial sensed event ventricular blanking;
- and
- while the post-atrial sensed event ventricular blanking is enabled:
- responsive to a first one of the first event signals in the first cardiac electrical signal, start a post-atrial sensed event ventricular blanking period;
- and
- schedule a first ventricular pacing pulse at the atrioventricular pacing interval from the first one of the first event signals;
- ignore a first one of the second ventricular event signals in the second cardiac electrical signal that occurs during the post-atrial sensed event ventricular blanking period;
- and
- control the therapy delivery circuitry to deliver the scheduled first ventricular pacing pulse at an expiration of the atrioventricular pacing interval when the first one of the second ventricular event signals occurs in the post-atrial sensed event ventricular blanking period.
11 more elements
A method comprising:
- sensing, via an atrial electrode pair of a plurality of electrodes carried by a housing of a medical device, a first cardiac electrical signal and first event signals in the first cardiac electrical signal;
- sensing, via a ventricular electrode pair of the plurality of electrodes, a second cardiac electrical signal and second event signals in the second cardiac electrical signal;
- enabling post-atrial sensed event ventricular blanking;
- while the post-atrial sensed event ventricular blanking is enabled, responsive to a first one of the first event signals in the first cardiac electrical signal, starting a post-atrial sensed event ventricular blanking period;
- scheduling a first ventricular pacing pulse at the atrioventricular pacing interval from the first one of the first event signals;
- ignoring a first one of the second ventricular event signals in the second cardiac electrical signal that occurs during the post-atrial sensed event ventricular blanking period;
- and
- delivering the scheduled first ventricular pacing pulse at an expiration of the atrioventricular pacing interval when the first one of the second ventricular event signals occurs in the post-atrial sensed event ventricular blanking period.
5 more elements
Dependencies are inferred from the claim text.