US 11,998,344 B2
Method and apparatus for atrial tachyarrhythmia detection
Shantanu Sarkar, Roseville, MN (US); Wade M. Demmer, Coon Rapids, MN (US); Todd J. Sheldon, North Oaks, MN (US); and Vincent E. Splett, Apple Valley, MN (US)
Assigned to Medtronic, Inc., Minneapolis, MN (US)
Filed by Medtronic, Inc., Minneapolis, MN (US)
Filed on Sep. 14, 2021, as Appl. No. 17/474,387.
Application 17/474,387 is a continuation of application No. 16/186,937, filed on Nov. 12, 2018, granted, now 11,123,005.
Prior Publication US 2021/0401350 A1, Dec. 30, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 5/363 (2021.01); A61B 5/00 (2006.01); A61B 5/361 (2021.01); A61N 1/362 (2006.01); A61N 1/39 (2006.01); A61B 5/287 (2021.01); A61B 5/316 (2021.01); A61B 5/352 (2021.01)
CPC A61B 5/363 (2021.01) [A61B 5/361 (2021.01); A61B 5/686 (2013.01); A61N 1/3622 (2013.01); A61N 1/3956 (2013.01); A61B 5/0031 (2013.01); A61B 5/287 (2021.01); A61B 5/316 (2021.01); A61B 5/352 (2021.01); A61B 5/7264 (2013.01); A61N 1/3624 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A medical device, comprising:
a sensor configured to sense a cardiac mechanical signal;
a cardiac electrical signal sensing circuit configured to sense ventricular events;
a pulse generator configured to generate ventricular pacing pulses; and
a control circuit coupled to the sensor, the sensing circuit, and the pulse generator, the control circuit configured to:
identify a plurality of ventricular events comprising the ventricular pacing pulses delivered by the pulse generator and ventricular events sensed by the cardiac electrical signal sensing circuit;
determine a first atrial arrhythmia score from the identified plurality of ventricular events;
determine a second atrial arrhythmia score from the cardiac mechanical signal by:
determining ventricular cycle lengths between the identified plurality of ventricular events;
sensing atrial events from the cardiac mechanical signal;
determining a count of the ventricular cycle lengths that include exactly one sensed atrial event during the respective ventricular cycle length; and
determining the second atrial arrhythmia score based on the determined count;
determine a percentage of the identified plurality of ventricular events that are ventricular pacing pulses;
determine that the percentage of the identified plurality of ventricular events that are ventricular pacing pulses is greater than a threshold percentage;
determine that atrial arrhythmia criteria are met based on the first atrial arrhythmia score and the second atrial arrhythmia score; and
in response to the percentage of the identified plurality of ventricular events that are ventricular pacing pulses being greater than the threshold percentage, withhold a detection of atrial arrhythmia when the atrial arrhythmia criteria are met based on the first atrial arrhythmia score and the second atrial arrhythmia score.