Systems for Detecting Cardiac Arrhythmias

摘要

A system for calculating a variability value that is indicative of AF by obtaining a signal sequence of a plurality of RR intervals by monitoring electrical activity of a patient's heart. Each RR interval is converted into an instantaneous heart rate value and sorted into ascending order. The difference between each successive heart rate is calculated, discarding the two largest differences. The variability value is calculated by adding the retained differences.

主权项

1. A method for calculating a variability value that is indicative of AF using a sequence of RR intervals, comprising the steps of:
obtaining a signal sequence comprising a plurality of RR intervals wherein said signal sequence is obtained by monitoring the time intervals between successive heart beats of a patient's heart by measuring at least one of electrical activity; acoustic activity; trans-thoracic impedance; blood pressure; blood velocity; blood oxygenation; heart movement and/or deformation; converting each RR interval in said sequence into an instantaneous heart rate value; sorting said instantaneous heart rate values into ascending order; calculating the difference between each successive heart rate; discarding the two largest differences generated in the previous step; and calculating a variability value by adding the retained differences.