Patent ID: 11865351
Assignee: PHYSIO-CONTROL, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 11:
12. A method, comprising:
detecting, during a first time interval, first electrocardiogram (ECG) signals of an individual via respective ECG channels;
comparing the first ECG signals in accordance with a selection criterion, wherein comparing the first ECG signals in accordance with the selection criterion comprises:
generating filtered signals by high-pass filtering the first ECG signals;
determining dwell times of the filtered signals by determining time intervals at which the filtered signals are within a threshold of baselines of the filtered signals; and
comparing the dwell times of the filtered signals;

in response to comparing the first ECG signals in accordance with the selection criterion, selecting a particular ECG channel among the ECG channels;
detecting, during a second time interval, a second ECG signal via the particular ECG channel;
determining whether the second ECG signal comprises ventricular fibrillation (VF) or ventricular tachycardia (VT); and
in response to determining whether the second ECG signal comprises VF or VT, outputting a shock or no-shock determination.