US 11,717,687 B2
Asystole and complete heart block detection
Joseph L. Sullivan, Kirkland, WA (US)
Assigned to West Affum Holdings DAC, Dublin (IE)
Filed by West Affum Holdings Corp., Grand Cayman (KY)
Filed on Jan. 6, 2021, as Appl. No. 17/142,477.
Claims priority of provisional application 62/957,411, filed on Jan. 6, 2020.
Prior Publication US 2021/0205618 A1, Jul. 8, 2021
Int. Cl. A61N 1/365 (2006.01); A61N 1/362 (2006.01); A61B 5/352 (2021.01); A61N 1/39 (2006.01)
CPC A61N 1/365 (2013.01) [A61B 5/352 (2021.01); A61N 1/3625 (2013.01); A61N 1/3904 (2017.08)] 18 Claims
OG exemplary drawing
 
1. An apparatus of a wearable cardioverter defibrillator (WCD) system, comprising:
a support structure wearable by a patient;
a plurality of electrocardiogram (ECG) electrodes capable of being applied to the skin of the patient to obtain an ECG signal;
a processor to receive and analyze the ECG signal of the patient, wherein the processor is configured to monitor four or more channels of the ECG signal; and
a high voltage subsystem coupled with defibrillation electrodes configured to be coupled with patient, wherein the processor is configured to cause the high voltage subsystem to apply a therapeutic shock to the patient through the defibrillation electrodes in response to a shockable event detected by the processor from the ECG signal;
wherein the processor is further configured to:
measure a peak-to-peak amplitude of QRS complexes of the ECG signal; and
detecting asystole in the patient when the peak-to-peak amplitude of one or more QRS complexes is less than an asystole threshold; and
wherein a unique asystole threshold is set for each of the four or more channels.