• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 1997.11a
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• pp.91-94
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• 1997

Objective of this stuey was to find the corrdlation between emotiona changes and the parameters of HRV spectrum evoked by tactile stimualtion. Twenty-one subjects were useds and five different types of materials, dry cottn, wet cotton, paper, sandpaper, and vinyl were applied to the left hand of each subject as a tactile stimulation. The results showed that HF/LF(ratio of high to low frequency amplitude calculated from power spectrum of HRV) decreased as the subject experienced the unpleasant emotion caused by wet cotton and sandpaper. On the othr hand, when the subject experienced the comfort, HF/LF increased. It was concluded that the proprsed methods can be applied to evaluate the characteristic changes in the autonomic nervous system which regulates the human emotion in the psychological aspects.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 1998.04a
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• pp.155-158
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• 1998

본 연구의 목적은 후각 자극에 의한 감성의 변화를 주관적 검사와 동시에 시행한 심전도에서 추출한 HRV parameter와의 상관관계를 보고자 함이다. 후각 자극은 0.6% orange와 2.5% valeric acid를 일정 flow와 일정 농오고 코 점막에 건조를 방지하기 위해 수증기로 포화시킨 향자극기로 주었다. 향의 주관적 검사에서는 오렌지향은 친숙하고 쾌하다고 하였으며 valeric acid경우 불쾌하고 성가시고 친숙하지 않는 감성을 표시하였ㅅ다. 이러한 쾌하고 불쾌한 향자극에 대한 HRV분석결과는 valeric acid에 비해 오렌지향을 제시하였을 때가 HF/LF값이 높은 변화를 보임으로써 부교감신경의 활동이 우세하였음을 확인하였다. 결론적으로 HRV스펙트럼 분석이 감성의 변화를 객관적인 지표로 나타내는데 유용한 정보로서의 가능성을 제시하고자 하였다.

• The Journal of the Society of Korean Medicine Diagnostics
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• v.16 no.3
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• pp.49-58
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• 2012

Objectives: This research was designed to study the characteristics of heart rate variability in acute dyspepsia patients compared with normal group. Methods: The testing of HRV was carried out at Oriental Medical Center of ${\bigcirc}{\bigcirc}$University with the participation of 94 acute dyspepsia patients and 85 control group people. We checked HRV of the 2 groups that were checked on the first visit day and compared HRV index between groups. Results: In the frequency domain analysis, HF, LF, VLF, LF/HF ratio, TP were significantly lower than control group on acute dyspepsia patient group. HF, LF, VLF, LF/HF ratio, TP were not significantly associated with age. Conclusions: According to this study, autonomic nerve system was more decreased on the acute dyspepsia patient group compared with the control group. Though further studies will be needed, the present finding provide us the possibility that stress is a major cause of the acute dyspepsia along with food factor.

• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.1906-1908
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• 2007

This study describes a software engine that can evaluate human sensibility using a heart rate variable(HRV) of hypochodriac or old people, and suggest biofeedback to enhance their emotion. To develop the software engine, using PPG signal heart rate and HRV are calculated. Using the FFT spectra of HRV, human sensibility is estimated. And a biofeedback software is designed with motion image player, breathing control and other function modules.

• Proceedings of the SAREK Conference
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• 2006.06a
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• pp.417-422
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• 2006

On trends of 'well-being', heat recovery ventilators(HRV) are recently installed in high rise buildings. HRV is not energy saving instrument but ventilating one. But many people have not been aware of the accurate fact. In this study, performances of HRV are tested under foreign and domestic standards. Especially air-tightness is measured three times by using gas concentration method and pressing equipment. Wet effective ventilating air volume is acquired by solving gas concentration equations. After research air-tightness and effective ventilating air volume must be more focused on than heat transfer efficiency to select the optimal HRV. Heat transfer efficiency must be adjusted by air-tightness results.

• The Journal of Internal Korean Medicine
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• v.29 no.4
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• pp.904-912
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• 2008

Objectives : The objective of this study was to investigate the correlation between swallowing acid symptom and autonomic nerve system in dyspepsia patients. Methods : The test for heart rate variability (HRV) was done to 50 dyspepsia patients at the Department of Internal Medicine, Kang-Nam Kyung-Hee Korean Hospital. 21 among 50 patients had swallowing acid symptom and 29 didn't. We checked HRV and compared HRV index between the two groups. We also divided the patients into functional dyspepsia and organic dyspepsia groups, and then checked HRV respectively. Results were as follows : 1. In dyspepsia patients with swallowing acid, LF/HF ratio was higher than the dyspepsia patients without swallowing acid but the result was not statistically significant. 2. TP, LF, VLF, and LF/HF ratio was higher in the functional dyspepsia group than in the organic dyspepsia group. Average age in the organic dyspepsia group was significantly higher than in the other group. Both results showed statistically significant difference. 3. In the functional dyspepsia group, LF/HF ratio was significantly higher in patients with swallowing acid symptom than those without. However, in eructation and nausea symptoms, HRV index was not statistically significant. Conclusion : This study shows the ratio of sympathetic and parasympathetic nerve system increased in the swallowing acid patient group compared with the non-swallowing acid patient group in functional dyspepsia patients.

• Journal of Oriental Medical Thermology
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• v.7 no.1
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• pp.30-36
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• 2009

Purpose : The purpose of this study is investigate the characters of DITI, HRV and Body composition analysis in Amenorrhea. Methods : We studied 47 patients visiting OO hospital from 1st October 2007 to 19st September 2009. The subjects were categorized in two groups, amenorrhea group(26) and normal group(21). We studied the difference of DITI, HRV and Body composition analysis between two groups by Mann-whitney test using SPSS for windows(version 12.0). Results : there is not statistically significant difference of DITI, HRV and BMI between amenorrhea group and normal group. But there is statistically significant difference of percent body fat and waist-hip ratio between amenorrhea group and normal group. Conclusion : Percent body fat and Waist-Hip ratio of amenorrhea groups is lower than normal groups. Percent body fat and Waist-Hip ratio can be diagnosis index.

• Korean Journal of Biological Psychiatry
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• v.12 no.1
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• pp.13-19
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• 2005

Objective:The purposes of this study were to investigate heart rate variability(HRV) in patients with generalized anxiety disorder(GAD) compared with major depressive disorder in Korea. Methods:Fifty-six GAD patients(20 male and 36 female) was classified into their comorbid psychiatric illness. Among them, Twenty-five patients(10 male and 15 female) who do not have any psychiatric comorbidity were compared with 30 major depressive disorder patients(12 male and 18 female). Clinical symptoms, HRV and MMPI were analysed between two group. Results:Comorbid psychiatric illnesses of GAD were ranked into no diagnosis(44.6%), MDD(32.1%), panic disorder(10.7%), social phobia(5.3%), PTSD(1.7%), OCD(1.7%), MDD+panic disorder(1.7%) and MDD+specific phobia(1.7%). GAD patients showed low functioning in HRV, but degree of decreasing HRV is not so severe compared with MDD patient. Balance of sympathetic and parasympathetic nerve tone is more severely impaired in GAD patients compared with MDD patient. The score of MMPI did not reveal any differences between two groups. Conclusions:The result showed that HRV can differenciate GAD and MDD patients. GAD patients could show decreased HRV functioning, less than MDD patients. But autonomic imbalance could be more severe in GAD than MDD patients.

• The Journal of Korean Obstetrics and Gynecology
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• v.21 no.1
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• pp.242-256
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• 2008

Purpose: The purpose of this study is to find out the relation of oriental medicine examination(Inbody, HRV, PTG) and FSH, LH. Methods: We have carried out clinical trials who volunteered for Sasang constitutional medicine and Oriental OB & GY, Oriental Medical hospital of Dong-Eui University from November 2005 to January 2006. Women of Volunteers were 129 persons. Because 7 persons didn't exam oriental examination so we analyzed the results statistically for 122 persons. Results: 1. Inbody & FSH, LH In the relation of FSH correlation with results of Waist-Hip Ratio, Visceral Fat Area was increased(+direction), in the relation of LH correlation with results of Edema, Visceral Fat Area was increased (+direction). 2.The fluents of HRV & FSH, LH In the relation of FSH, LH correlation with results of SDNN, RMS, TP, VLF, LF, HF was decreased (-direction). 3.The fluents of PTG & FSH, LH In the relation of FSH, LH correlation with results of the fluents of PTG was decreased (-direction), with results of b_a was increased (+direction), with results of d_a was decreased (-direction). Conclusion: From this study, Inbody and HRV and PTG are corelation with FSH, LH.

• Journal of Acupuncture Research
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• v.23 no.3
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• pp.143-153
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• 2006

Introduction : This study was designed to evaluate the effect of acupuncture on Unified Parkinson's Disease Rating Scale (UPDRS) and Heart Rate Variability (HRV) of patients with Parkinson's disease Methods: Subjects were voluntarily recruited through newspaper and internet advertisement. All the subjects were confirmed as idiopathic parkinson's disease by a neurologist. Acupuncture was applied 2 times a week for four weeks by oriental medical doctor at Kyung-hee University hospital. Acupuncture points used were GB34 and LR3. The patient's symptoms were assessed before and after 4 weeks of treatment by UPDRS and HRV. HRV was measured for 5 minutes before and after 4 weeks of treatment. Results : The results were as follows; 1. In both groups, UPDRS scores were significantly improved after 4 weeks compared to the pre-treatment 2. After 4 weeks of treatment UPDRS score differences between the two groups were insignificant 3. After 4 weeks of treatment HRV parameter scores showed statistically insignificant differences between the two groups. SDNN parameters of the Experimental group were significantly increased. Conclusion : This study suggests that acupuncture treatments can be applicable to improve symptoms in the patients with idiopathic Parkinson's disease. Further study on the acupuncture and HRV in the patients with Parkinson's disease is recommended.