Method and apparatus for establishing parameters for cardiac event detection
AssigneeMedtronic, Inc.
InventorsVincent E. Splett, Keelia Doyle, Greggory R. Herr, Juliana E. Pronovici, Todd J. Sheldon
Life of this patent
Estimating the term…
Abstract
A pacemaker having a motion sensor is configured to set atrial event sensing parameters used for sensing atrial systolic events from a motion signal produced by the motion sensor. The pacemaker sets at least one atrial event sensing parameter by identifying ventricular electrical events and setting a sensing window following each of the ventricular electrical events. The pacemaker may determine a feature of the motion signal produced by the motion sensor during each of the sensing windows and set the atrial event sensing parameter based on the determined features.
Claims20
A medical device comprising:
- a pulse generator configured to generate pacing pulses;
- a sensing circuit configured to receive a cardiac electrical signal;
- a motion sensor configured to sense a motion signal that includes atrial systolic events;
- and
- a control circuit coupled to the motion sensor and the pulse generator and configured to:
- set a non-atrial tracking pacing mode for controlling the pulse generator to generate pacing pulses comprising ventricular pacing pulses delivered asynchronously to atrial systolic events in the motion signal;
- identify a plurality of ventricular cycles during the non-atrial tracking pacing mode, wherein each ventricular cycle of the plurality of ventricular cycles is identified based on at least one of the cardiac electrical signal or a ventricular pacing pulse generated by the pulse generator;
- for each of the plurality of ventricular cycles identified during the non-atrial tracking pacing mode:
- set a first sensing window;
- and
- determine a first feature of the motion signal sensed during the first sensing window;
- determine a first distribution of the determined first features;
- set an atrial event sensing parameter based on the first distribution;
- and
- sense an atrial systolic event from the motion signal using the atrial event sensing parameter;
- and
- the pulse generator is further configured to generate a pacing pulse in response to the sensed atrial systolic-event.
A method comprising:
- generating pacing pulses;
- sensing a motion signal that includes atrial systolic events;
- setting a non-atrial tracking pacing mode for controlling generating pacing pulses so that ventricular pacing pulses are being delivered asynchronously to atrial systolic events in the motion signal;
- sensing a cardiac electrical signal;
- identifying a plurality of ventricular cycles during the non-atrial tracking pacing mode, wherein each ventricular cycle of the plurality of ventricular cycles is identified based on at least one of the cardiac electrical signal or a ventricular pacing pulse;
- for each of the plurality of ventricular cycles identified during the non-atrial tracking pacing mode:
- setting a first sensing window;
- and
- determining a first feature of a the motion signal sensed during the first sensing window;
- determining a first distribution of the determined first features;
- setting an atrial event sensing parameter based on the first distribution;
- sensing an atrial systolic event from the motion signal using the atrial event sensing parameter;
- and
- generating a pacing pulse in response to sensing the atrial systolic event.
Dependencies are inferred from the claim text.