Patent ID: 8543197
Filing Date: 2013-09-24
Classification: A61B,A63B

Abstract:
1. A portable electronic device comprising: a pulse sensor configured to receive pulse data from a subject; a processor electrically connected to the pulse sensor, wherein the processor is configured to determine a power spectrum distribution of the pulse data, to determine a heart rate variability waveform based on the pulse data having a power spectrum distribution (PSD), to determine a coherence level for the subject derived from a PSD peak of said PSD, and to track the PSD peak of the PSD, wherein the PSD peak has an amplitude and frequency which vary over time; a coherence indicator electrically connected to the processor and configured to provide a coherence indication representative of the coherence level of the subject; and a respiration indicator electrically connected to the processor and configured to prompt the subject to breath at a desired respiration frequency which is associated with an increased coherence level.