US 11,883,178 B2
Method and system to detect P-waves in cardiac arrhythmic patterns
Fujian Qu, San Jose, CA (US); Nima Badie, Berkeley, CA (US); and Jong Gill, Valencia, CA (US)
Assigned to Pacesetter, Inc., Sylmar (CA)
Filed by Pacesetter, Inc., Sylmar, CA (US)
Filed on Feb. 18, 2022, as Appl. No. 17/675,345.
Application 17/675,345 is a continuation of application No. 16/991,421, filed on Aug. 12, 2020, granted, now 11,284,828.
Prior Publication US 2022/0167906 A1, Jun. 2, 2022
Int. Cl. A61B 5/361 (2021.01); A61B 5/35 (2021.01); A61B 5/316 (2021.01); A61B 5/00 (2006.01); A61B 5/363 (2021.01)
CPC A61B 5/361 (2021.01) [A61B 5/316 (2021.01); A61B 5/35 (2021.01); A61B 5/7264 (2013.01); A61B 5/363 (2021.01); A61B 5/686 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A computer implemented method for detecting arrhythmias in cardiac activity, comprising:
under control of one or more processors configured with specific executable instructions,
obtaining far field cardiac activity (CA) signals for one or more beats;
applying a detection process, to the CA signals, to obtain a device marker;
identifying a first feature of interest (FOI) within an analysis window of a segment of the CA signal;
calculating a difference between the first FOI and the device marker;
adjusting a feature detection window with respect to the CA signals based on the difference;
detecting a second FOI in the feature detection window over the CA signals; and
rejecting an arrhythmia detection based on the second FOI detected.