US 12,472,364 B2
Post-ventricular atrial blanking in a cardiac device
Todd J. Sheldon, North Oaks, MN (US); Keelia M. Escalante, Minneapolis, MN (US); and Aaron M. Saikin, Round Lake, IL (US)
Assigned to Medtronic, Inc., Minneapolis, MN (US)
Filed by Medtronic, Inc., Minneapolis, MN (US)
Filed on Sep. 27, 2022, as Appl. No. 17/935,885.
Claims priority of provisional application 63/274,323, filed on Nov. 1, 2021.
Prior Publication US 2023/0136887 A1, May 4, 2023
Int. Cl. A61N 1/365 (2006.01); A61N 1/375 (2006.01)
CPC A61N 1/36585 (2013.01) [A61N 1/36542 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A medical device comprising:
a motion sensor configured to sense a motion signal;
a pulse generator configured to generate ventricular pacing pulses; and
a control circuit in communication with the motion sensor and the pulse generator, the control circuit configured to:
identify a first plurality of cardiac events;
determine a first cardiac event interval based on the first plurality of cardiac events;
determine whether the first cardiac event interval is:
less than a threshold interval; or
greater than the threshold interval;
select one of:
a first blanking period duration if the first cardiac event interval is less than the threshold interval; or
a second blanking period duration if the first cardiac event interval is greater than the threshold interval, the second blanking period duration being greater than the first blanking period duration;
identify a second plurality of cardiac events after the first plurality of cardiac events;
apply a post-ventricular atrial blanking period to the motion signal during the second plurality of cardiac events, the post-ventricular atrial blanking period being set to the selected one of the first blanking period duration or the second blanking period duration; and
sense an atrial event signal from the motion signal after an expiration of the post-ventricular atrial blanking period; and
wherein the pulse generator is configured to generate a ventricular pacing pulse in response to the control circuit sensing the atrial event signal.