US 12,274,889 B2
System and method for sensing and detection in an extra-cardiovascular implantable cardioverter defibrillator
Xusheng Zhang, Shoreview, MN (US); Jian Cao, Shoreview, MN (US); Saul E. Greenhut, Denver, CO (US); and Robert W. Stadler, Shoreview, MN (US)
Assigned to Medtronic, Inc., Minneapolis, MN (US)
Filed by Medtronic, Inc., Minneapolis, MN (US)
Filed on Jul. 15, 2022, as Appl. No. 17/812,974.
Application 17/812,974 is a continuation of application No. 16/714,921, filed on Dec. 16, 2019, granted, now 11,413,470.
Application 16/714,921 is a continuation of application No. 15/964,182, filed on Apr. 27, 2018, granted, now 10,507,332, issued on Dec. 17, 2019.
Application 15/964,182 is a continuation of application No. 15/140,802, filed on Apr. 28, 2016, granted, now 9,956,423, issued on May 1, 2018.
Claims priority of provisional application 62/328,407, filed on Apr. 27, 2016.
Prior Publication US 2022/0347487 A1, Nov. 3, 2022
Int. Cl. A61N 1/39 (2006.01); A61B 5/29 (2021.01); A61B 5/352 (2021.01); A61B 5/00 (2006.01); A61B 5/363 (2021.01)
CPC A61N 1/3987 (2013.01) [A61B 5/29 (2021.01); A61B 5/352 (2021.01); A61N 1/3925 (2013.01); A61N 1/3956 (2013.01); A61B 5/0002 (2013.01); A61B 5/363 (2021.01)] 19 Claims
OG exemplary drawing
 
1. A medical device comprising:
a sensing circuit configured to:
receive a plurality of cardiac electrical signals;
sense a first plurality of R-waves from a first cardiac electrical signal of the plurality of cardiac electrical signals; and
sense a second plurality of R-waves from a second cardiac electrical signal of the plurality of cardiac electrical signals; and
a control circuit configured to:
detect a first threshold number of tachyarrhythmia intervals from the first plurality of R-waves;
detect a second threshold number of tachyarrhythmia intervals from the second plurality of R-waves, wherein the second threshold number of tachyarrhythmia intervals is less than the first threshold number of tachyarrhythmia intervals;
detect a tachyarrhythmia episode in response to detecting at least the first threshold number of tachyarrhythmia intervals and the second threshold number of tachyarrhythmia intervals; and
a therapy delivery circuit configured to deliver an anti-tachyarrhythmia therapy in response to the control circuit detecting the tachyarrhythmia episode.