US 12,440,681 B2
Method and apparatus for establishing parameters for cardiac event detection
Todd J. Sheldon, North Oaks, MN (US); Keelia M. Escalante, Minneapolis, MN (US); Mikayle A. Holm, Minneapolis, MN (US); and Paul R. Solheim, Blaine, MN (US)
Assigned to Medtronic, Inc., Minneapolis, MN (US)
Filed by MEDTRONIC, INC., Minneapolis, MN (US)
Filed on May 23, 2022, as Appl. No. 17/751,388.
Claims priority of provisional application 63/213,570, filed on Jun. 22, 2021.
Prior Publication US 2022/0401741 A1, Dec. 22, 2022
Int. Cl. A61N 1/36 (2006.01); A61N 1/365 (2006.01)
CPC A61N 1/36585 (2013.01) [A61N 1/36542 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A medical device comprising:
a motion sensor configured to sense a motion signal; and
a control circuit coupled to the motion sensor to receive the motion signal and configured to:
set a sensing window during each of a plurality of ventricular cycles;
determine that the motion signal sensed after an ending time of the sensing window meets atrial event criteria for at least a portion of the plurality of ventricular cycles;
determine a first feature of the motion signal sensed during each of the sensing windows of the portion of the plurality of ventricular cycles for which the motion signal sensed after the ending time of the sensing window meets the atrial event criteria;
set an atrial event sensing parameter based on the determined first features;
sense an atrial event signal from the motion signal according to the atrial event sensing parameter; and
produce a sensed atrial event signal in response to sensing the atrial event signal.