System for sensing abnormal heart activity by means of heart rate acceleration and deceleration detection

Abstract From the Canadian patent

A heart rate acceleration/deceleration detecting systems particularly for use with an automatic defibrillator/cardioverter. The detection system detects a series of heart beats and determines for a group of beats, such, as on a beat-by-beat basis whether the heart rate has accelerated above a first predetermined value. If such acceleration is determined the system checks to, see if the acceleration of the heart beats was followed by an immediate deceleration that exceeds a predetermined value. If a large acceleration followed by an absence of a large deceleration is detected a signal is provided, to an arrhythmia detecting logic circuit as an indication of an arrhythmia that may be …