Patent ID: 9375151
Filing Date: 2016-06-28
CPC Classification: A61B

Claim Text:
1. A method for detecting cardiac events by analyzing a digitized waveform signal derived from sensors, the method comprising the steps of: (i) computing a plurality of ST deviations from the digitized waveform over an initial time period for a plurality of heart beats, each of said ST deviations being an ST deviation for a singular heartbeat; (ii) storing data pertaining to the plurality of ST deviations; (iii) determine an upper limit of the plurality of ST deviations by selecting an ST deviation value that exceeds the value of most but not all of the plurality of ST deviations; (iv) determine a lower limit of the plurality of ST deviations by selecting an ST deviation value that is less than the value of most but not all of the plurality of ST deviations, said upper and lower limits of the ST deviations containing therebetween a reduced set of ST deviations with respect to all ST deviations computed within said initial time interval; (v) compute a dispersion measure of the reduced set of plurality of ST deviations within said initial time period that is based on both the upper and lower limits; (vi) apply a test to detect a cardiac event after the initial time period, wherein the test is based on the dispersion measure.