Patent ID: 9113830
Filing Date: 2015-08-25
Classification: A61B

Abstract:
1. A method for determining cardiac arrhythmia in a patient comprising: electronically receiving a photoplethysmograph signal of a subject from a sensing device, wherein the photoplethysmograph signal comprises a plurality of downstroke regions; calculating a measure of a first downstroke region; calculating an average measure of two or more downstroke regions; comparing the measure of the first downstroke region and the average measure; detecting a change in a feature of the signal based at least in part on the comparison; generating a transformed signal based at least in part on a transformation of the photoplethysmograph signal; detecting a change in a feature of the transformed signal; identifying information indicative of a pulse rhythm abnormality based at least in part on the detected change in the feature of the transformed signal; and determining cardiac arrhythmia in the subject based at least in part on the information indicative of the pulse rhythm abnormality and the detected change in the feature of the photoplethysmograph signal.