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System and method to detect significant arrhythmic events through a photoplethysmogram (PPG) and accelerometer

  • US 10,524,736 B2
  • Filed: 12/06/2013
  • Issued: 01/07/2020
  • Est. Priority Date: 12/14/2012
  • Status: Active Grant
First Claim
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1. A medical system for detecting arrhythmic events, said system comprising:

  • at least one processor programmed to;

    receive a photoplethysmogram (PPG) signal generated using a PPG probe positioned on or within a patient;

    receive a pulse signal generated using an accelerometer positioned on or within the patient;

    extract features from the PPG signal to generate PPG feature vectors;

    extract features from the pulse signal to generate pulse feature vectors;

    correlate the PPG feature vectors with the pulse feature vectors; and

    evaluate correlated PPG feature vectors and correlated pulse feature vectors to detect arrhythmic events;

    wherein features extracted from the PPG signal include inter pulse intervals (IPIs) for pairs of adjacent pulses of a last predetermined number of pulses; and

    wherein features extracted from the pulse signal include inter pulse intervals (IPIs) for pairs of adjacent pulses of a last predetermined number of pulses.

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