US 12,329,973 B2
Rhythm sensing during external pacing
Joseph L. Sullivan, Kirkland, WA (US); Jaeho Kim, Redmond, WA (US); and David P. Finch, Bothell, WA (US)
Assigned to West Affum Holdings DAC, Dublin (IE)
Filed by West Affum Holdings DAC, Dublin (IE)
Filed on Dec. 23, 2021, as Appl. No. 17/561,607.
Claims priority of provisional application 63/129,887, filed on Dec. 23, 2020.
Prior Publication US 2022/0193405 A1, Jun. 23, 2022
Int. Cl. A61N 1/365 (2006.01); A61N 1/04 (2006.01); A61N 1/362 (2006.01); A61N 1/39 (2006.01)
CPC A61N 1/365 (2013.01) [A61N 1/046 (2013.01); A61N 1/0484 (2013.01); A61N 1/3625 (2013.01); A61N 1/3904 (2017.08); A61N 1/3975 (2013.01); A61N 1/3993 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A wearable cardioverter defibrillator (WCD) system for a patient, the WCD system comprising:
one or more energy sources to store electrical charge;
therapy electrodes;
an Electrocardiogram (ECG) electrode to sense an ECG signal of the patient when the patient is wearing the WCD system; and
a processor configured to:
analyze portions of the sensed ECG signal using bradycardia pacing criteria to determine whether the bradycardia pacing criteria are met, wherein the bradycardia pacing criteria comprise a first bradycardia criterion for an onset of a bradycardia event, and a second bradycardia criterion that comprises a confirmation period to confirm the bradycardia event, the confirmation period occurring after the first bradycardia criterion is met,
cause, responsive at least in part to determining that the bradycardia pacing criteria are met, at least one of the one or more energy sources to discharge at least some of the stored electrical charge as pacing pulses via the therapy electrodes while the patient is wearing the WCD system,
analyze portions of the sensed ECG signal using asystole pacing criteria to determine whether the asystole pacing criteria are met,
cause, responsive at least in part to determining that the asystole pacing criteria are met, at least one of the one or more energy sources to discharge at least some of the stored electrical charge as pacing pulses via the therapy electrodes while the patient is wearing the WCD system,
cause a pause in the discharge of pacing pulses,
analyze portions of the sensed ECG signal that were sensed during the pause against one or more escape pacing criteria to determine whether the one or more escape pacing criteria are met, and responsive to determining that the one or more escape pacing criteria are met, cause the at least one of the one or more energy sources to discontinue the discharge of pacing pulses,
analyze portions of the sensed ECG signal using shock criteria to determine whether the shock criteria are met, and
cause, responsive at least in part to determining that the shock criteria are met, at least one of the one or more energy sources to discharge at least some of the stored electrical charge as a shock via the therapy electrodes while the patient is wearing the WCD system.