US 11,950,915 B2
Automatic determination and selection of filtering in a cardiac rhythm management device
Venugopal Allavatam, Saratoga, CA (US); Stephen J. Hahn, Shoreview, MN (US); Keith L. Herrmann, Minneapolis, MN (US); Mitchell D. Lanz, Maple Grove, MN (US); Krzysztof Z. Siejko, Maple Grove, MN (US); and Benjamin Speakman, Eagan, MN (US)
Assigned to CARDIAC PACEMAKERS, INC., St. Paul, MN (US)
Filed by CARDIAC PACEMAKERS, INC., St. Paul, MN (US)
Filed on Dec. 9, 2020, as Appl. No. 17/116,819.
Application 17/116,819 is a continuation of application No. 16/177,884, filed on Nov. 1, 2018, granted, now 10,888,238.
Application 16/177,884 is a continuation of application No. 15/362,862, filed on Nov. 29, 2016, granted, now 10,149,627, issued on Dec. 11, 2018.
Claims priority of provisional application 62/262,043, filed on Dec. 2, 2015.
Prior Publication US 2021/0113135 A1, Apr. 22, 2021
Int. Cl. A61B 5/316 (2021.01); A61B 5/00 (2006.01); A61B 5/287 (2021.01); A61B 5/30 (2021.01); A61B 5/304 (2021.01); A61B 5/349 (2021.01); A61B 5/352 (2021.01); A61N 1/362 (2006.01); A61N 1/37 (2006.01); A61N 1/39 (2006.01)
CPC A61B 5/316 (2021.01) [A61B 5/287 (2021.01); A61B 5/30 (2021.01); A61B 5/304 (2021.01); A61B 5/349 (2021.01); A61B 5/352 (2021.01); A61B 5/725 (2013.01); A61N 1/3627 (2013.01); A61N 1/3702 (2013.01); A61N 1/3925 (2013.01); A61N 1/3956 (2013.01); A61B 5/7282 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of operation in a cardiac rhythm management device comprising plural sensing electrodes for capturing a cardiac signal and operational circuitry coupled to the plural sensing electrodes for analyzing the cardiac signal, the operational circuitry configured with a selectable filtering mode allowing filtering the captured cardiac signal according to a first approach and a second approach, the second approach applying an additional high pass filter relative to the first approach, the method comprising:
filtering cardiac signals with the second approach and analyzing the cardiac signals that have been filtered with the second approach to detect cardiac cycles;
determining that conditions indicate a termination of the second approach is appropriate by analyzing intervals between detected cardiac cycles, and determining that plural such intervals exceed one or more predefined thresholds; and
switching to use of the first approach for filtering the cardiac signals.