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Abstract

A Wearable Medical System (WMS) that implements a wearable cardioverter defibrillator (WCD). In embodiments, the WMS detects when the patient's heart rate exceeds a high threshold heart rate. If it does, a present ECG peak amplitude is compared with a previous ECG peak amplitude that is stored in a memory. If there is deterioration enough to meet or exceed a peak amplitude decrease criterion, a therapeutic shock is administered to the patient. In additional optional embodiments, even if the peak amplitude decrease criterion is not met, it may be determined whether the ECG signal has QRS complexes that meet a morphology stability criterion. If yes, then VT may be detected, for which a therapeutic shock may be delivered upon confirmation. If not, then the event may be dismissed as electrical noise.

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First Claim