• Korean Journal of Psychosomatic Medicine
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• v.6 no.2
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• pp.193-209
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• 1998

The author conducted a literature review to better characterize the current state of knowledge regarding the relationship between psychological and behavioral factors and cardiovascular disease. This review focus on several problems : Hypertension, coronary artery disease such as myocardial infarction and angina pectoris. We describe model for understanding the relation-ship of psychological factors to the disease, review the results of relevant research studies and provide recommendation for further research.

• Journal of Korea Game Society
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• v.17 no.2
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• pp.17-26
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• 2017

Excessive use of the internet and smart phones have become a social issue. The level of engagement has both positive and negative effects such as good performance or indulgence phenomenon, respectively. This study was to develop an algorithm to determine the engagement state based on cardiovascular response. The participants were asked to play a pattern matching game and the experimental design was divided into cooperation and competition task to provide the level of engagement. The correlation between heart rate and amplitude was analyzed according to each task. The regression equation and accuracy were verified by polynomial regression analysis. The results showed that heart rate and amplitude were positively correlated when the task was a game, and negatively correlated when there was a reference task. The accuracy of classifying between game and reference task was 89%. The accuracy between tasks was confirmed to be 76.5%. This study is expected to be used to quantitatively evaluate the level of engagement in real time.

• Journal of Korean Academy of Nursing
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• v.35 no.7
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• pp.1371-1378
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• 2005

Purpose: This study was designed to examine the relation of trait anger and anger expression to blood pressure, cholesterol, and depression in middle-aged Korean women. Methods: This descriptive correlational design was conducted using a convenient sample taken from the health center of K University Hospital located in Kyungki province, Korea. The subjects were 252 women aged 40 to 64 years. Spielberger's state trait anger expression inventory - Korean version and Beck's depression inventory were used for measuring trait anger, state anger, anger expression and depression. Data was analyzed by descriptive statistics, t-test, Pearson correlation, two-way ANOVA, and cluster analysis using a pc-SAS program. Results: The anger expression types by cluster analysis were Anger out/in type, Low anger expression type, and Anger control type. The level of cholesterol and depression were significantly higher in women with high anger in and high trait anger. In addition, the level of depression was significantly higher in women with a high anger temperament. Conclusions: Trait anger and anger in might be related to cholesterol and depression in women. However, this study does not reveal the relation between blood pressure and trait anger and anger expression.

• Journal of Life Science
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• v.22 no.4
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• pp.545-551
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• 2012

Pressurization walk training (PWT) with blood flow occlusion has been investigated with regard to muscle hypertrophy and physical fitness function in athletes and healthy people. However, the cardiorespiratory and cardiovascular responses of obese people to PWT are unknown. Thus, we investigated the effects of PWT on body composition (Weight, FM, LBM, %fat, BMI), cardiovascular responses (HR, SV, CO, TVC), and cardiorespiratory responses ($VO_2max$, VEmax, HRmax) in middle-aged obese women. They participated in walk training with (n=15) blood flow occlusion and cross-sectional areas of the quadriceps on both legs. Five sets of 3-min walking (5.5 km/h at 5% grade) and 1-min resting were performed twice a day, 5 days/week for 3 weeks. The results showed that the LBM was significantly increased, and decreased body weight of reducing FM, %bodyfat in PWT ($p$<0.05). For the cardiovascular response, SBP and TPR were significantly decreased ($p$<0.05), and CO increased ($p$<0.05). In addition, the $VO_2max$ and VEmax were improved through PWT. Therefore, this study suggests that the presence of obesity in middle-aged women may result in body composition, cardiorespiratory, and cardiovascular responses caused by PWT.

• Korean Journal of Clinical Laboratory Science
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• v.47 no.3
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• pp.97-104
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• 2015

Sleep is not only an essential physiological function, but also serves important roles in promoting growth, maturation, and overall health of humans. There is increasing interest regarding the impact of sleep and its disorders on the regulation of inflammatory processes and end-organ morbidities, particularly in the context of metabolic and cardiovascular diseases (CVD) and their complications. Obstructive sleep apnea syndrome (OSAS) is an increasingly common health problem in children. In the last decade, the emergence of increasing obesity rates has further led to remarkable increases in the prevalence of OSAS, along with more prominent neurocognitive, behavioral, cardiovascular and metabolic morbidities. Although the underlying mechanisms leading to OSAS-induced morbidities are likely multifactorial and remain to be fully elucidated, activation of inflammatory pathways by OSAS has emerged as an important pathophysiological component of the end-organ injury associated with this disorder. To this effect, it would appear that OSAS could be viewed as a chronic, low-grade inflammatory disorder. Furthermore, the concurrent presence of obesity and OSAS poses a theoretically increased risk of OSAS-related complications. In this study, we will critically review the current state of research regarding the impact of insufficient and disrupted sleep and OSAS on the immune processes and inflammatory pathways that underlie childhood OSAS as a distinctive systemic inflammatory condition in children, and will explore potential interactions between OSAS and obesity.

• Journal of Life Science
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• v.18 no.2
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• pp.193-199
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• 2008

The purpose of this study was to demonstrate the effectiveness of walking and band exercise for 12 weeks on c-reactive protein and cardiovascular disease risk factor in overweight and obese children. Body composition, blood lipids, insulin sensitivity, c-reactive protein (CRP) were assessed before, after 4 weeks and after 12 weeks of combined exercise. Sixteen participants (BMI${\geq}$21.3) were randomly allocated to exercise group (n=8) and control group (n=8). The exercise group participated in 50 minutes of walking exercise and band exercises as resistance training two days a week for 12 weeks. There were significant different on weight (p<0.001), BMI (p<0.001), fat mass (p<0.001), fat percentage (p<0.001), LBM percentage (p<0.001), TG (p<0.05), HDL-C (p<0.01), insulin (p<0.05), HOMA-IR (p<0.05) in exercise group after intervention. And the change of weight (p<0.001), BMI (p<0.001), fat mass (p<0.001), fat percentage (p<0.001), LBM mass (p<0.05), LBM percentage (p<0.001), insulin (p<0.05), HOMA-IR (p<0.05) were significant difference between groups after intervention. These findings suggest that 12 weeks of walking and band exercise can be useful intervention in the improvement of cardiovascular disease risk factor in overweight and obese children. But c-reactive protein was no change.

• Journal of Korean Academy of Nursing
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• v.36 no.5
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• pp.863-871
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• 2006

Purpose: A descriptive correlational study was designed to examine the relationship of trait anger and anger expression to blood pressure, cholesterol, and depression in middle-aged Korean men. In addition, this study investigated the mediating effect of social support in relation to anger and other variables. Methods: Two hundred and ninety nine men aged 40 to 64 years were recruited from a health center at K University Hospital located in Ansan City, Kyungki province, Korea. The instruments used were Spielberger's state trait anger expression inventory-the Korean version for trait anger and anger expression, Beck's depression inventory for depression, and a Personal resource questionnaire for perceived social support. Results: Men with high trait anger showed significantly higher systolic blood pressure(BP) and diastolic BP The level of cholesterol did not have a significant relationship with trait anger and anger expression. The severity of depression was significantly higher in men with high trait anger or more frequent uses of anger-in or anger-out. The perceived social support had a significant mediating effect in relation to trait anger and depression. Conclusions: Various nursing interventions for managing anger or improving social support need to be developed in a future study.

• Journal of the Korea Society of Computer and Information
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• v.24 no.10
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• pp.175-182
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• 2019

The study was conducted to verify the effect of basic life support training on the skill ability of police officers. The subjects of this study were 10 experimental group and 10 comparative group with voluntary consent after explaining the theory and significance of the training experiment at the police station located in K. The education program used in this study consists of theoretical education and practical training, and the theoretical education is 60 minutes and the practical training is 30 minutes. The measurement tool for basic resuscitation performance was measured based on the 'CPR and ECG Guidelines for Cardiopulmonary Resuscitation and Emergency Cardiovascular Care' presented by the American Heart Association. The results are as follows. The experimental group showed higher performance skills than the traditional control group in field confirmation performance skills, primary evaluation performance skills (A, B, C, medical evaluation), and BLS performance skills (heart compression, artificial respiration, medical evaluation) which are the basic resuscitation performance skills. In conclusion, this study confirmed that the theory and practice education program is more effective in improving the clinical performance of police officers than the traditional lectures and practice education, so it is possible to apply this simulation education program to the cardiac arrest patient emergency treatment.

• Journal of Life Science
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• v.15 no.5 s.72
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• pp.703-706
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• 2005

The purpose of this study is to investigate the combined effect of L-arginine supplementation and regular physical exercise on HR, BP, eNOS and Macrophage activation using SHR. To examine the differences among HR, BP, eNOS, and Macrophage activity levels, normotensive Wistar-Kyoto rats were used as a control. Thirty two male rats (six weeks old) were divided into four groups; eight WKY control (WKYC), eight SHR control (SHRC), eight SHR supplemented with L-arginine (SHRA), and eight SHR trained and supplemented with L-arginine (SHRTA). Obtained results were as follows : In the heart and blood pressure, there was significant differences anong the four group (p<.05) compare to SHRC. In the eNOS levels, there was significant differences among the four groups (p<.05) compare to SHRC. In the macrophage activity, there was significant differences among the four groups (p<.05) compare to SHRC. In conclusion, For the SHRC group, the level of eNOS is higher than that of WKYC, and we can expect tissue damage caused by toxic free radical. However, this can be stabilized by the L-arginine supplementation and regular physical training. we can also conclude regular aerobic training decrease cardiovascular stress caused by stabled macrophage activity. Therefore, we can trace it is the effect of training in SHR.

• Journal of Life Science
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• v.28 no.5
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• pp.587-596
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• 2018

This study aims to observe changes in heart-rate variability (HRV) indices induced by e-cigarette and conventional-cigarette smoking and to compare the differences in acute cardiac autonomic regulation. All participants (n=41) were exposed to both e-cigarette smoke (ES) and conventional cigarette smoke (CS) in a randomized crossover trial. HRV analysis was performed during each smoking session based on a recorded r-r interval 10 minutes before smoking and at specified recovery periods (REC1, 0-5 min; REC2, 5-10 min; REC3, 10-15 min; REC4, 15-20 min; REC5, 20-25 min; and REC6, 25-30 min). ES led to a significantly increased cardiac sympathetic index (LF/HF ratio) compared with the baseline, and it shifted the sympathovagal balance toward sympathetic predominance, including reduction in the complexity of the interbeat interval (SampEn). In REC1 after ES, only decreases of parasympathetic indices such as rMSSD, pNN50, HF, and SD1 were indicated. CS sessions produced not only an increased LF/HF ratio during smoking and recovery periods (REC1 and REC4) but also enhanced sympathetic predominance on autonomic balance during smoking and recovery periods (REC1, REC2, and REC4). In the CS trials, parasympathetic indices of time and non-linear analysis (rMSSD, pNN50, and SD1) were decreased during smoking and in REC1 to REC5. SampEn was also reduced during smoking and REC1 to REC4. Acute sympathoexcitatory effects induced by e-cigarette use produced statistically significant results. Parasympathetic withdrawal after smoking suggests that e-cigarettes may cause increased cardiovascular risk.