• Title, Summary, Keyword: 심박수 변이도

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Detection of Arrhythmia Using Heart Rate Variability and A Fuzzy Neural Network (심박수 변이도와 퍼지 신경망을 이용한 부정맥 추출)

  • Jang, Hyoung-Jong;Lim, Joon-Shik
    • Journal of Internet Computing and Services
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    • v.10 no.5
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    • pp.107-116
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    • 2009
  • This paper presents an approach to detect arrhythmia using heart rate variability and a fuzzy neural network. The proposed algorithm diagnoses arrhythmia using 32 RR-intervals that are 25 seconds on average. We extract six statistical values from the 32 RR-intervals, which are used to input data of the fuzzy neural network. This paper uses the neural network with weighted fuzzy membership functions(NEWFM) to diagnose arrhythmia. The NEWFM used in this algorithm classifies normal and arrhythmia. The performances by Tsipouras using the 48 records of the MIT-BIH arrhythmia database was below 80% of SE(sensitivity) and SP(specificity) in both. The detection algorithm of arrhythmia shows 88.75% of SE, 82.28% of SP, and 86.31% of accuracy.

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The Effect of Boxing Aerobic Exercise Training on Heart Rate Variability in Rest (복싱에어로빅 운동이 안정 시 심박수변이도에 미치는 영향)

  • Kwak, Yi-Sub;Kim, Eun-Young;Sim, Young-Je
    • Journal of Life Science
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    • v.19 no.2
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    • pp.271-276
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    • 2009
  • The Purpose of this study was to examine the effects of boxing aerobic training on resting heart rate variability (HRV) in females. The subjects for this study were performed 16 female college students that aged 19-23. The subjects were divided into two groups; boxing aerobic exercise group (9 students) and control group (7 students). Boxing aerobic training program was performed three times a week for twelve weeks with $VO_{2max}$ 60-80% exercise intensity. The results of this study were following; 1. Mean HRT (mean heart rate) had no signigicant difference among the groups and exercise time. 2. SDNN (standard deviation of the normal to normal interval) had no significant difference among the group and exercise time. 3. RMS-SD (square root of the mean squared differences of successive normal to normal interval) had no significant difference among the groups and exercise time. 4. TP (total power) had no significant difference among the groups and exercise time. 5. LF (low frequency) had no significant difference among the groups and exercise time. 6. HF (high frequency) had no significant difference among the groups and exercise time. 7. LF/HF (low frequence/high frequency ratio) had no significant difference among the groups and exercise time. 8. VLF (very low frequency) had no significant difference among the groups and exercise time.

An Analysis of Relationship between Self-Reported Anxiety, Depressiveness and Parametors of Heart rate variability based on Photoplethysmography (불안 및 우울에 대한 주관적 설문평가 지표와 맥파 신호 기반의 심박변이도 요소들 간의 상관관계 분석)

  • Lee, Chung-Ki;Yoo, Sun-Kook
    • Science of Emotion and Sensibility
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    • v.15 no.3
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    • pp.345-354
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    • 2012
  • The purpose of this study is finding alternative parameters of the HRV so as to minimize the subjective errors by STAI and BDI, could be have two types of significant correlation levels depending on normalized method. Particularly, the LF/HF presented as the quantitative physiological parameter that can reflect both state-anxiety and trait-anxiety.

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A Study on Measurement Heart Rate Variability using modified Laplacian Electrode (초소형 라플라시안 센서를 이용한 심박변이도의 측정에 관한 연구)

  • Lee, Chung-Keun;Park, Hyun-Chul;Park, Hang-Sik;Kim, Hong-Rae;Kim, Yong-Ho;Lee, Jeong-Whan;Kim, Yong-Jun;Lee, Myoung-Ho
    • Proceedings of the KIEE Conference
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    • pp.1973-1974
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    • 2008
  • 심전도는 심장의 전기적인 활동을 나타내는 지표로, 심장활동 및 자율 신경계를 관찰하기 위해 R 파형의 간격을 측정함으로써 심박변이도를 추출할 수 있다. 심박변이도는 자율신경계의 관찰 이외에도 급성 심근경색의 예후판정이나 심장급사 예견, 당뇨병 관찰, 감성 및 스트레스 평가 등 다양한 분야에서 활용되고 있다. 그러나 심전도의 추출해야하는 과정을 거쳐야 하기 때문에, 임상적인 목적이 아닐시에도 3 전극을 몸에 부착하여 측정하는 것은 심박변이도에 대한 접근성을 떨어뜨리고 있다. 본 연구에서는 심박변이도의 측정을 위하여 수정된 방식의 라플라시안 전극을 설계하고 이를 이용해 심박변이도의 측정 및 분석을 함으로써 접근성 높은 새로운 심박변이도 측정용 전극에 대해 제시하였다.

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The Effects of Posture and Sleep Deprivation on Heart Rate Variability (자세와 수면 박탈이 심박 변이도에 미치는 영향)

  • Shim, Young-Woo;Yang, Dong-In;Kim, Nam-Hyun;Kim, Deok-Won
    • Journal of the Institute of Electronics Engineers of Korea SC
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    • v.47 no.2
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    • pp.43-49
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    • 2010
  • Autonomic nervous system (ANS) acts as a control system functioning largely below the level of consciousness, and controls visceral functions. The activity of the ANS has been assessed by means of the heart rate variability (HRV). It has been reported that HRV is dependent on sex, age, body mass index, and smoking, etc. However, the effects of posture and sleep deprivation on HRV have rarely been reported. Objective of our work was to find out which posture is appropriate for stable HRV. We measured the number of sleep deprivation and HRV using power spectrum in six stages for 30 minutes. Increased low frequency (LF) power and high frequency (HF) power indicate enhanced sympathetic and parasympathetic activity, respectively. We determined the LF/HF ratio to minimize individual difference. It was found that sleep deprivation by awakening up subjects was affected by posture, which resulted in changes of LF/HF. Although LF/HF varied with time, it was more stable in sitting than in supine. In conclusion, we recommend sitting posture when measuring HRV because of less sleep deprivation resulting in less variation in LF/HF.

Change of heart rate variability by electro-acupuncture stimulus in rats (전침 자극이 쥐의 심박 변이도 변화에 미치는 영향)

  • Kim, Jung-Dae;Soh, Kwang-Sup;Kim, Yun-Jin
    • Korean Journal of Acupuncture
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    • v.24 no.2
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    • pp.185-191
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    • 2007
  • 목 적 : 전침 자극은 최근에 임상연구와 더불어 기초연구에서 자주 사용하는 방법으로 경락이론에 의거하여 신체에 분포되어 있는 경락상의 각종경혈부위에 인위적인 전기 자극을 통하여 질병을 치료, 예방 혹은 완화하는 방법이다. 이에 본 연구에서는 정상적인 쥐의 상태에서 일정한 전침 자극을 주었을 때, 심박변이도의 변화를 측정 하였다. 방 법 : 쥐의 정상적인 마취상태에서 태충혈에 4 Hz와 80 Hz의 5 V 크기로 10 mA 강도의 사각파 파형으로 자극을 주었으며 대조조로 비경혈 부위에 4 Hz의 동일한 파형으로 자극을 주어 심박 변이도의 변화정도를 측정하였다. 결 과 : 본 실험에서 RR Interval의 경우 태충혈 4 Hz 보다 80 Hz일때 RR Interval의 파형이 더 크게 나타났으며, PSD의 분석에서도 자극 전후를 비교하였을 때 $1{\sim}3$ Hz 사이에 높은 피크가 보였으며 4 Hz의 비경혈 부위에서는 큰 변화를 보이지 않았다. 결 론 : 이번 실험연구를 통하여 정상적인 쥐의 상태에서 일정한 전침 자극을 주었을 때, 심박 변이도 변화를 도출할 수 있었으며, 이번 실험을 통해 비수술적인 방법으로 치료효과와 심박 변이도를 측정할 수 있었고, 이를 통해 전침자극의 기전 연구에 있어 과학적 근거를 제시할 수 있다고 사료된다.

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Design and Implementation of a Prediction System for Cardiovascular Diseases using PPG (PPG를 이용한 심혈관 질환 예측 시스템의 설계 및 구현)

  • Song, Je-Min;Jin, Gye-Hwan;Seo, Sung-Bo;Park, Jeong-Seok;Lee, Sang-Bock;Ryu, Keun-Ho
    • Journal of the Korean Society of Radiology
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    • v.5 no.1
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    • pp.19-25
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    • 2011
  • Photoplethysmogram(PPG) is the method to obtain the biomedical signal using the linear relationships between the blood volume for changing the cardiac contraction and relaxation and the amount of light for absorbing the hemoglobin in the blood. In this paper, we proposed the analyzed results which show the heart rate variability and the distribution of heart rate for before and after using PPG. Moreover, this paper designed and implemented the system based on personal computer to predict cardiovascular disease in advance using the analyzed results for the autonomic balance from taking the spectral analysis of heart rate and the state of the blood vessel for analyzing APG(acceleration plethysmogram).

Neuro-Fuzzy Network-based Depression Diagnosis Algorithm Using Optimal Features of HRV (뉴로-퍼지 신경망 기반 최적의 HRV특징을 이용한 우울증진단 알고리즘)

  • Zhang, Zhen-Xing;Tian, Xue-Wei;Lim, Joon-S.
    • The Journal of the Korea Contents Association
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    • v.12 no.2
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    • pp.1-9
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    • 2012
  • This paper presents an algorithm for depression diagnosis using the Neural Network with Weighted Fuzzy Membership functions (NEWFM) and heart rate variability (HRV). In the algorithm, 22 different features were initially extracted from the HRV signal by frequency domain, time domain, wavelet transformed, and Poincar$\acute{e}$ transformed feature extraction methods; of these 6 optimal features were selected by significance evaluation using Non-overlap Area Distribution Measurement (NADM) based on NEWFM. The proposed algorithm uses these 6 optimal features to diagnose depression with an accuracy of 95.83%.

A Study on Audio-visual Stimulation Based Unconstrained Stress Analysis using Chair-type BCG Measurement System (의자형 심탄도 측정시스템을 이용한 시청각 자극 기반의 무구속 스트레스 분석 연구)

  • Kim, Byeong-Ju;Noh, Yun-hong;Jeong, Do-Un
    • Proceedings of the Korea Information Processing Society Conference
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    • pp.1012-1013
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    • 2014
  • 본 논문에서는 일상생활 중 지속적으로 심장 상태를 모니터링 할 수 있는 무구속 의자형 심탄도 측정시스템을 개발하였다. 또한 구현된 시스템에서 측정된 생체신호를 이용하여 주관적인 감정자극의 스트레스를 분석하기 위한 연구를 수행하였다. 수준을 분석하고자 하였다. 실험은 시스템에 착석하여 실시간으로 시청각 자극 실험을 수행하였고, 심박수와 심박변이도의 시간영역 및 주파수영역 파라미터를 확인하였다. 확인된 심박변이도의 파라미터는 시청각 도중 기술한 인간의 감정들을 체계화하여 2차원 공간에 여러 감정들의 관계를 나타낸 제임스 러셀(J. Russell)의 감정모델을 주관적인 감정 자극에 의한 스트레스 지표 나타내어 비교 분석하였다. 실험결과는 RMSSD, LF/HF 파라미터가 스트레스 수준 분류에 사용될 수 있는 잠재력을 가지고 있음을 증명한다.

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The Concept and Clinical Application for the Measurement of Heart Rate Variability (심박동수 변이(Heart Rate Variability) 측정법의 개념과 임상적 활용)

  • Woo, Jong-Min
    • Korean Journal of Psychosomatic Medicine
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    • v.12 no.1
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    • pp.3-14
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    • 2004
  • In this article, the effects of stress on central nerve system and heart function and the concept of heart rate variability were reviewed. HRV(Heart Rate Variability), the periodical change of the heart rate, is indicated larger in the healthier because they respond flexibly to various sorts of facts influencing on HR. HRV analysis is largely composed of the time domain analysis and the frequency analysis. In the former the flexibility of heart function is analysed, while in the latter autonomic nerve function is examined, which is the degree of sympathetic and parasympathetic nerve activity and the state of balance. Furthermore, existence or nonexistence of disease and/or level of stress can be estimated by measuring the variability and normality of heart rate, and balance of autonomic nerve system, and through HRV biofeedback the symptoms of anxiety disorder or asthma can be reduced.

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