In an embodiment, an apparatus for detecting arrhythmias within a body, the apparatus includes: an input stage to receive an electrocardiogram signal from a body connected thereto through a detection electrode input, wherein the input stage is a real-time dynamically adjustable signal transformation stage configured to condition the electrocardiogram signal; an analysis stage coupled to the input stage to receive the conditioned electrocardiogram signal from the input stage, wherein the analysis stage comprises, a transformation stage wherein a frequency and/or phase domain representation of the conditioned electrocardiogram signal is formed from the conditioned time-domain electrocardiogram signal, and an evaluation stage, wherein time, frequency and/or phase domain features related to the arrhythmias are extracted from the time, frequency and/or phase domain representation. Wherein one possible instantiation of the evaluation stage comprises a Spectral Dispersion Metric (SDM) evaluation stage configured to determine, for example, the dispersion of frequency energy over a predetermined range of frequencies relative to the frequency with the highest energy Spectral Frequency Dispersion Metric (SFDM), and/or Spectral Time Domain Dispersion metric (STDM) and/or Spectral Phase Domain Dispersion Metric (SPDM) representations and configured to normalize the energy to form a dispersion metric over the predetermined range of frequencies, time intervals and/or phases; and a classification stage coupled to the evaluation stage to receive the total normalized power and determine whether the body is experiencing the arrhythmias.
Algorithm and Device to Detect and Differentiate AF from Other ArrythmiasTechnology #4633
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