Patent ID: 8852116
Filing Date: 2014-10-07
Classification: A61B,G16H

Abstract:
1. A method for utilizing a heart rate variability index for diagnosis of a psychiatric disorder or detection of the risk of onset thereof, comprising: a task presentation and frequency analysis step at which a frequency analysis is performed on a measured heart rate and a measured heartbeat interval of a subject for determining a high-frequency index, a low-frequency index, and a ratio therebetween; a sympathetic nervous system and parasympathetic nervous system index calculation step at which a sympathetic nervous system index and a parasympathetic nervous system index are calculated from a result of the frequency analysis; and an index comparison evaluation step at which the heart rate, the sympathetic nervous system index and parasympathetic nervous system index calculated are compared, for evaluation, with threshold values which have been determined from the heart rate, the sympathetic nervous system index, and the parasympathetic nervous system index of a healthy subject that have been previously calculated and stored, wherein the high-frequency index, the low-frequency index, and the ratio therebetween at said frequency analysis step are obtained through the measurement and frequency analysis in a resting state, a task performing state, and a resting state after task performance of the subject; wherein the threshold values being set so as to reflect the psychiatric symptom and the psychiatric disorder onset risk in a multilateral manner for every index in the respective states.