US 11,806,154 B2
Method and apparatus for verifying bradycardia/asystole episodes via detection of under-sensed events
Shantanu Sarkar, Roseville, MN (US); Michael L Hudziak, Stillwater, MN (US); Jerry D. Reiland, Coon Rapids, MN (US); and Erin N. Reisfeld, Minneapolis, MN (US)
Assigned to Medtronic, Inc., Minneapolis, MN (US)
Filed by Medtronic, Inc., Minneapolis, MN (US)
Filed on Nov. 15, 2021, as Appl. No. 17/454,923.
Application 16/523,297 is a division of application No. 15/081,216, filed on Mar. 25, 2016, granted, now 10,413,207, issued on Sep. 17, 2019.
Application 17/454,923 is a continuation of application No. 17/323,836, filed on May 18, 2021, granted, now 11,172,863.
Application 17/323,836 is a continuation of application No. 16/523,297, filed on Jul. 26, 2019, granted, now 11,259,736.
Prior Publication US 2022/0071545 A1, Mar. 10, 2022
Int. Cl. A61B 5/363 (2021.01); A61B 5/00 (2006.01); A61B 5/287 (2021.01); A61B 5/316 (2021.01); A61B 5/335 (2021.01); A61B 5/332 (2021.01); A61N 1/365 (2006.01); A61N 1/39 (2006.01); A61B 5/352 (2021.01); A61B 5/364 (2021.01)
CPC A61B 5/363 (2021.01) [A61B 5/287 (2021.01); A61B 5/316 (2021.01); A61B 5/335 (2021.01); A61B 5/352 (2021.01); A61B 5/6861 (2013.01); A61B 5/7221 (2013.01); A61N 1/36514 (2013.01); A61N 1/3956 (2013.01); A61N 1/3987 (2013.01); A61B 5/364 (2021.01); A61B 2505/07 (2013.01); A61B 2560/0468 (2013.01)] 29 Claims
OG exemplary drawing
 
1. An insertable cardiac monitor comprising:
a housing configured for subcutaneous implantation within a patient, the housing having a length, a width, and a depth,
wherein the length is greater than the width and the width is greater than the depth,
wherein the length is within a range from 40 millimeters (mm) to 60 mm,
wherein the width is within a range from 3 mm to 10 mm, and
wherein the depth is within a range from 2 mm to 5 mm;
a distal electrode;
a proximal electrode; and
circuitry comprising a processer within the housing, the circuitry configured to:
sense a cardiac signal of the patient via the distal electrode and the proximal electrode;
compare an amplitude of the cardiac signal to a threshold;
detect an R-wave based on the comparison of the amplitude of the cardiac signal to the threshold;
detect an asystole based on a comparison of the amplitude of the cardiac signal subsequent to the detected R-wave to the threshold; and
further process the cardiac signal sensed during a pause interval that is subsequent to the detected R-wave to determine whether the asystole is false in response to detecting the asystole.