• Title, Summary, Keyword: Short Term HRV Analysis

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Comparison of HRV Time and Frequency Domain Features for Myocardial Ischemia Detection (심근허혈검출을 위한 심박변이도의 시간과 주파수 영역에서의 특징 비교)

  • Tian, Xue-Wei;Zhang, Zhen-Xing;Lee, Sang-Hong;Lim, Joon-S.
    • The Journal of the Korea Contents Association
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    • v.11 no.3
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    • pp.271-280
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    • 2011
  • Heart Rate Variability (HRV) analysis is a convenient tool to assess Myocardial Ischemia (MI). The analysis methods of HRV can be divided into time domain and frequency domain analysis. This paper uses wavelet transform as frequency domain analysis in contrast to time domain analysis in short term HRV analysis. ST-T and normal episodes are collected from the European ST-T database and the MIT-BIH Normal Sinus Rhythm database, respectively. An episode can be divided into several segments, each of which is formed by 32 successive RR intervals. Eighteen HRV features are extracted from each segment by the time and frequency domain analysis. To diagnose MI, the Neural Network with Weighted Fuzzy Membership functions (NEWFM) is used with the extracted 18 features. The results show that the average accuracy from time and frequency domain features is 75.29% and 80.93%, respectively.

Effects of Head-Up Tilt on Nonlinear Properties of Heart Rate Variability in Young and Elderly Subjects

  • Jin, Seung-Hyun;Kim, Wuon-Shik;No, Ki-Yong
    • International Journal of Vascular Biomedical Engineering
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    • v.3 no.1
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    • pp.14-22
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    • 2005
  • In the present study, our aim is to investigate whether responses to the head-up tilt (HUT) on nonlinear properties of heart rate variability (HRV) in young and elderly subjects are different or not. Thirteen young-healthy subjects ($24.5{\pm}3.7$ years) and 18 old-aged healthy subjects ($74.5{\pm}7.4$ years) participated in this study. An electrocardiogram (ECG) in the supine posture, at $0^{\circ}$, and in the standing posture, at $70^{\circ}$ of head-up tilt, was recorded. Detrended fluctuation analysis (DFA) and approximate entropy (ApEn), measures of short-/long-term correlation properties and overall complexity of heart rate (HR) respectively, along with spectral components of HR variability (HRV) were analyzed for both the supine and HUT postures. We observed that the short-term fractal exponent ${\alpha}_1$ increased during HUT posture (F(1, 29) = 39.79, P = 0.000), especially, the young subjects showed a significantly higher values compared to the elderly subjects. ApEn significantly decreased (F(1, 29) = 8.61, P = 0.006) during HUT posture. HUT posture decreased the complexity in HR dynamics and increased short-term fractal exponent values in young subjects but not in elderly subjects. These results imply that there are differences of response to HUT on nonlinear properties between young and elderly subjects.

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Effect of College Students' Perceived Stress, Cognitive Response to Stress, and Somatization on Heart Rate Variability (대학생의 지각된 스트레스, 인지적 스트레스, 신체화가 심박변이도에 미치는 영향)

  • Park, Keum Suk;Yoon, Hea Min
    • Journal of Korean Biological Nursing Science
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    • v.21 no.3
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    • pp.178-187
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    • 2019
  • Purpose: The purpose of this study was to investigate how college students' perceived stress, cognitive stress, and somatization affect their heart rate variability (HRV). Methods: This study is a cross-sectional survey research on 191 university students, registered at the G University. The perceived stress scale (PSS) and cognitive stress response scale, were used to assess level of stress. The somatization symptom scale of the Symptom Check List 90 (SCL-90), was used to assess level of somatization caused by stress. To assess heart rate variability (HRV), we conducted a five-minute test using a pulse wave analyzer, to analyze short-term HRV. Results: The SCL-90 somatization score had relatively high positive correlation (p< .001) with cognitive stress, but low positive correlation (p< .001) with perceived stress. Cognitive stress response had low negative correlation (p< .001) with 1nSDNN and 1nRMSSD among HRV parameters. Perceived stress was not correlated with HRV. Multiple regression analysis showed that variables of perceived stress, cognitive stress, and somatization symptoms, could not explain HRV. By contrast, one of the HRV indicators, 1nSDNN, was affected by age, gender, and aggressive-hostile thought, the latter being a subscale of the cognitive stress response scale. Conclusion: This study suggests that stress evaluation for people in early adulthood will be more effective, if the evaluation examines cognitive stress and heart rate variability.

Relationship among Sleep Quality, Heart Rate Variability, Fatigue, Depression, and Anxiety in Adults (성인의 수면의 질에 따른 심박변이도, 피로, 우울 및 불안과의 관계)

  • Kim, Ju Ah;Kang, Seung Wan
    • Korean Journal of Adult Nursing
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    • v.29 no.1
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    • pp.87-97
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    • 2017
  • Purpose: The purpose of this study was to investigate the relationship among sleep quality, heart rate variability (HRV), fatigue, depression, and anxiety reported by Korean adults. Methods: A cross-sectional study of 208 adults aged 20~60 years was conducted using a short-term HRV analysis and self-reported questionnaires of Pittsburgh Sleep Quality Index (PSQI), Fatigue Severity Scale, Beck Depression Inventory, and State Trait Anxiety Inventory. Results: Subjects with good sleep quality (PSQI $score{\leq}5$) had higher HRV total power (t=2.03, p=.043) and high-frequency (t=2.04, p=.043) with lower fatigue (t=-4.08, p<.001), depressive mood (t=-3.66, p<.001), and trait anxiety (t=-3.84, p<.001) than subjects with poor sleep quality. Poor sleep quality was negatively correlated with HRV total power (r=-.17, p=.016), high-frequency (r=-.14, p=.049), and positively fatigue (r=.39, p<.001), depression (r=.44, p<.001), state anxiety (r=.23, p=.001) and trait anxiety (r=.34, p<.001). Conclusion: The results indicated that sleep quality is correlated with HRV which reflects the activities of the autonomic nerve system, fatigue, depression, and anxiety in adults.

The Effect of Laser Acupuncture at $HT_7$(Sinmun) for Mental Stress on Short-term Analysis of Heart Rate Variability (신문혈(神門穴) 레이저침 시술이 정신적 스트레스를 가한 성인의 심박변이도에 미치는 영향)

  • Jang, Jin-Young;Cho, Seong-Yeun;Kim, So-Jung;Kim, Yong-Suk;Nam, Sang-Soo
    • Journal of Acupuncture Research
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    • v.27 no.5
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    • pp.51-58
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    • 2010
  • Objectives : The purpose of this study is to assess the effect of laser acupuncture at $HT_7$ for reducing mental stress using power spectrum analysis of the heart rate variability. Methods : 36 healthy volunteers(control group: 18, treatment group: 18) participated in this study. After instrumentation and 5-minute rest period, 5-minute metal stress by operation was provided. HRV was recorded before and after the mental stress(1st, 2nd HRV). After 2nd HRV recording, the control group rested for 15 minutes without any treatments. Participants in the treatment group received laser acupuncture to $HT_7$ unilaterally and rested for 15minutes. Points were irradiated for 60seconds, and the intensity was 1.8J(output 20%). And then 3rd HRV was recorded. Results : In simple rest group, LF norm showed a significant change after mental stress. In laser acupuncture group, LF norm, HF norm, LF, HF and LF/HF ratio showed a significant change after mental stress. But there were no significant difference between two groups(ANCOVA test, p>0.05). In laser acupuncture group, LF norm, HF norm, HF and LF/HF ratio showed a significant change after laser acupuncture treatment. And there were significant differences between two groups(p<0.05). Conclusions : This study suggests that laser acupuncture at $HT_7$ can regulate and prevent the alternation of autonomic nervous system due to mental stress.

Effects of Oriental Medicine Music Therapy for Mental Stress on Short-term Analysis of Heart Rate Variability (한방음악치료가 정신적 스트레스를 가한 정상 성인의 심박변이도에 미치는 영향)

  • Kim, Jin-Yi;Kim, Soo-Jung;Seo, Joo-Hee;Ryu, Chun-Gil;Yoon, In-Ae;Park, Eun-Young;Sung, Woo-Yong
    • Journal of Oriental Neuropsychiatry
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    • v.22 no.1
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    • pp.1-12
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    • 2011
  • Objectives : This study was conducted to assess effects of oriental medicine music therapy on heart rate variability(HRV) in normal subjects under mental stress. Methods : 34 healthy volunteers(control group:17, experimental group:17) participate in this study. The volunteers were randomly allocated into two groups. After 10-minutes rest period and instrumentation, both groups performed a mental stress test for 12-minutes. HRV was recorded before and after the mental stress. And then the experimental group applied oriental medicine music therapy for 10-minutes. In the control group, they rested for 10-minutes. And HRV was recorded. Results : After giving mental stress stimulation to both groups, LF and LF/HF ratio were significantly increased and HF, mean HRV were decreased. In experimental group, LF, LF/HF ratio were significantly decreased and HF, SDNN were significantly increased after applying oriental medicine music therapy. In control group, LF was significantly decreased. And LF/HF ratio was decreased and HF, SDNN were increased, but it was not significant. Conclusions : This results show that oriental medicine music therapy could be relatively useful to decrease sympathetic activity and prevent the alteration of autonomic nervous system due to mental stress.

A Study on Relations between Skeletal Maturity and Heart Rate Variability (골성숙도와 심박 변이도의 상관성에 대한 연구)

  • Lee, Hye-Lim;Han, Jae-Kyung;Kim, Yun-Hee
    • The Journal of Pediatrics of Korean Medicine
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    • v.26 no.3
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    • pp.1-11
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    • 2012
  • Objectives The purpose of this study is to examine the relationship between skeletal maturity and heart rate variability (HRV) based on the bone age and HRV parameters. Methods 103 children from 6 years to 17 years of age, who do not have any disease-related symptom, and visited ${\bigcirc}{\bigcirc}$ oriental medicine hospital, are measured based on their bone age and short-term spectral analysis of HRV. Results 1. Skeletal maturity was significantly correlated with HRV indices: mean HRT and SDNN. As the skeletal maturity increases, the mean HRT was decreased and the SDNN was increased. 2. When classifying according to the skeletal maturity score, the mean HRT was higher in the 'below -0.4' group compare to '-0.3~0.7' group and '0.8~1.9' group. SDNN was higher in the '0.8~1.9' group compare to '-0.3~0.7' group, 'below -0.4' group 3. When classifying according to the sex, age and secondary sexual characteristics, as the skeletal maturity was increased, the mean HRT was significantly decreased and the SDNN was significantly increased only in the boys who did not develop secondary sexual characteristics. Conclusions Skeletal maturity could be statistically significant with HRV indices, especially to the boys and the children than the girls and the teenagers.

Effect of $PC_6$ Moxibustion for Mental Stress on Short-term Analysis of Heart Rate Variability (내관(內關)($PC_6$) 애구(艾灸)가 정신적 스트레스를 가한 성인의 심박변이도에 미치는 영향)

  • Cho, Seong-Yeun;Jang, Jin-Young;Kim, So-Jung;Nam, Sang-Soo;Kim, Yong-Suk
    • Journal of Acupuncture Research
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    • v.27 no.2
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    • pp.51-58
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    • 2010
  • Objectives : The purpose of this study was to assess the effect of $PC_6$ moxibustion treatment for reducing mental stress using power spectrum analysis of the heart rate variability(HRV). Methods : 20 healthy volunteers(simple rest group : 10, moxibustion treatment group : 10) participated in this study. After instrumentation and 5-minutes rest period, mental stress by operation was provided for 5-minutes. HRV was recorded before and after the mental stress. And then the simple rest group rested for 15-minutes. The moxibustion treatment group was treated by $PC_6$ moxibustion and rested for 15-minutes. And then HRV was recorded. Results : In simple rest group, LF norm and HF norm showed a significant change after mental stress. In moxibustion treatment group, LF, HF, LF norm, HF norm and LF/HF showed a significant change after mental stress. But there were no significant difference between two groups(p>0.05) except HF. In moxibustion treatment group, LF, LF norm, HF norm and LF/HF showed a significant change after moxibustion treatment. There were significant differences between two groups(p<0.05). Conclusions : The result suggests that $PC_6$ moxibustion treatment can regulate and prevent the alteration of autonomic nerve system by mental stress.

Effect of Hwangryunhaedok-tang Pharmacopuncture at $CV_{17}$(Jeonjung : 膻中) for Mental Stress on Short-term Analysis of Heart Rate Variability (전중(膻中)($CV_{17}$) 황련해독탕약침(黃連解毒湯藥鍼)이 정신적 스트레스를 가한 성인의 심박 변이도에 미치는 영향)

  • Cho, Seong-Yeun;Ha, Seon-Yun;Jang, Jin-Young;Nam, Sang-Soo;Kim, Yong-Suk
    • Journal of Acupuncture Research
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    • v.26 no.5
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    • pp.49-56
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    • 2009
  • Objectives : The purpose of this study was to assess the effect of Hwangryunhaedok-tang pharmacopuncture at $CV_{17}$ for reducing mental stress using power spectrum analysis of the heart rate variability(HRV). Methods : 30 healthy volunteers(control group: 15, experimental group: 15) participated in this study. After instrumentation and 5-minutes rest period, mental stress by operation was provided for 5-minutes. HRV was recorded before and after the mental stress. And then the control group rested for 15-minutes. The experimental group was injected Hwangryunhaedok-tang pharmacopuncture at $CV_{17}$ and rested for 15-minutes. And then HRV was recorded. Results : In simple rest group, LF norm and HF norm showed a significant change after mental stress. In pharmacopuncture group, LF norm, HF norm and LF/HF showed a significant change after mental stress. But there were no significant difference between two groups(p>0.05). In pharmacopuncture group, LF norm, HF norm and LF/HF showed a significant change after pharmacopuncture injection. There were significant difference between two groups(p<0.01). Conclusions : The result suggests that Hwangryunhaedok-tang pharmacopuncture at $CV_{17}$(Jeonjung) can regulate and prevent the alteration of autonomic nerve system due to mental stress.

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A Study on Characters of Heart Rate Variability in Young Overweight and Obese Woman (젊은 비만 여성의 심박변이도 특성에 대한 연구)

  • Lee, Yoon-Jae;Hwang, Deok-Sang;Lee, Chang-Hoon;Lee, Kyung-Sub
    • Journal of Korean Medicine for Obesity Research
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    • v.8 no.1
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    • pp.63-70
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    • 2008
  • Objectives Obesity is the major risk factor of the heart disease and the metabolic disease. The autonomic nervous system is a key contributor in the regulation of energy balance, so the blunted activity may contribute to the maintenance of the obese state. So we evaluated the function of the autonomic nervous system in young overweight and obese women with heart rate variability. Methods The subjects were 26 overweight and obese young women(BMI〉$23kg/m^2$) and 25 lean women who visited Kangnam Kyunghee hospital for obesity management from March 2006 to April 2008. Bioimpedance Analysis (BIA), short-term spectral analysis of heart rate variability (HRV) were performed. Results HRV of obese young group was lower than the lean young group, but there is no statistical significance. BMI had significantly a negative correlation with Low Frequency(LF) of HRV. LF power is mediated by sympathetic nervous system activity. These results indicate a decrease of sympathetic modulation in overweight and obese young women. Conclusions Overweight and obese young women have decreased sympathetic nervous system activity. In clinical practice, an assessement of HRV would be noninvasive and sensitive methods for sympathetic nervous system of young overweight and obese women.

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