US 12,337,185 B1
Detecting shockable polymorphic ventricular tachycardia
Joseph L. Sullivan, Kirkland, WA (US)
Assigned to West Affum Holdings Designated Activity Company, Dublin (IE)
Filed by West Affum Holdings Designated Activity Company, Dublin (IE)
Filed on Jan. 13, 2021, as Appl. No. 17/148,101.
Claims priority of provisional application 62/989,668, filed on Mar. 14, 2020.
Int. Cl. A61N 1/39 (2006.01); A61B 5/024 (2006.01); A61B 5/363 (2021.01); A61B 5/366 (2021.01); A61N 1/362 (2006.01)
CPC A61N 1/3904 (2017.08) [A61B 5/024 (2013.01); A61B 5/363 (2021.01); A61B 5/366 (2021.01)] 21 Claims
OG exemplary drawing
 
1. A method for controlling a wearable cardioverter defibrillator (WCD), the method comprising:
obtaining a signal from at least one sensor, wherein the at least one sensor gathers data about a patient to generate the signal;
analyzing the signal from the at least one sensor into QRS complexes;
determining a width of the QRS complexes;
determining a heart rate from the width of the QRS complexes;
detecting a slow polymorphic ventricular tachycardia (PVT) episode has occurred in the patient based, at least in part, on the heart rate and QRS complexes, the detected slow PVT episode comprises detecting that the heart rate is between 120 and 170 Beats per Minute (BPM) and the QRS complexes are wider than 120 ms;
classifying the slow PVT episode as a delay shock condition or a no shock condition;
detecting whether the delay shock condition has continued for a predetermined period after the slow PVT episode was detected; and
issuing a shock command to the WCD in response to a detection that the delay shock condition has continued for the predetermined period, wherein the shock command causes the WCD to deliver a shock to the patient.