US 11,701,062 B2
Detection of noise signals in cardiac signals
Ya-Jian Cheng, Lino Lakes, MN (US); and D'Anne E Kudlik, Saint Louis Park, MN (US)
Assigned to Medtronic, Inc., Minneapolis, MN (US)
Filed by Medtronic, Inc., Minneapolis, MN (US)
Filed on Apr. 22, 2021, as Appl. No. 17/237,839.
Application 17/237,839 is a division of application No. 15/802,615, filed on Nov. 3, 2017, granted, now 10,987,517.
Claims priority of provisional application 62/471,938, filed on Mar. 15, 2017.
Prior Publication US 2021/0236063 A1, Aug. 5, 2021
Int. Cl. A61B 5/308 (2021.01); A61B 5/00 (2006.01); A61N 1/365 (2006.01); A61N 1/37 (2006.01); A61N 1/362 (2006.01); A61B 5/25 (2021.01); A61B 5/35 (2021.01); A61B 5/282 (2021.01); A61B 5/287 (2021.01); A61B 5/349 (2021.01); A61B 5/352 (2021.01); A61B 5/30 (2021.01); A61B 5/366 (2021.01)
CPC A61B 5/7203 (2013.01) [A61B 5/25 (2021.01); A61B 5/282 (2021.01); A61B 5/287 (2021.01); A61B 5/349 (2021.01); A61B 5/35 (2021.01); A61B 5/352 (2021.01); A61B 5/686 (2013.01); A61B 5/6823 (2013.01); A61B 5/7264 (2013.01); A61N 1/365 (2013.01); A61N 1/3622 (2013.01); A61N 1/371 (2013.01); A61N 1/3704 (2013.01); A61B 5/30 (2021.01); A61B 5/366 (2021.01); A61B 5/6801 (2013.01); A61B 5/6852 (2013.01); A61B 5/7217 (2013.01); A61B 5/7278 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A medical device system comprising:
a plurality of electrodes configured to sense electrical activity of a heart of a patient; and
processing circuitry configured to:
receive a cardiac signal generated in response to sensing the electrical activity of the heart of the patient using the plurality of electrodes;
determine a difference signal from the cardiac signal, the difference signal comprising a set of amplitude values determined by calculating a difference between an amplitude value of the cardiac signal at a first time and an amplitude value of the cardiac signal at a second time, wherein the second time is a predefined time prior to the first time;
set a first detection window having a first time period extending for a predefined amount of time and a second detection window having a second time period starting at the expiration of the first detection window and extending for a predefined amount of time following the expiration of the first detection window;
determine a quantification value for the difference signal occurring within the second detection window;
compare the quantification value to one or more threshold values;
determine that the cardiac signal includes a noise signal in response to a determination that the quantification value exceeds the one or more threshold values, and
in response to the determination that the cardiac signal includes the noise signal, output, for display to a user, an indication that the cardiac signal includes the noise signal.