• 한국정보통신학회논문지
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• 제16권3호
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• pp.585-590
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• 2012

관상동맥 중재술은 관상동맥 조영술과 동시에 치료를 시행하는 방법으로 심도관 검사의 핵심으로 자리잡았다. 관상동맥중재술 시에는 혈관의 협착지점에 스텐트를 삽입하여야 하기 때문에 혈관의 손상이나 파열에 주의하여야 한다. 이에 시술자는 혈관의 손상이나 파열의 문제를 해결하기 위해 혈관의 경로를 정확하게 인식하여야 한다. 하지만 영상의 화질에 따른 문제들로 인하여 혈관의 경로추출에 오류를 범할 수 있다. 따라서 본 논문에서는 영상의 화질에 영향을 미치는 영상잡음에 대한 성능평가를 위하여 전처리 과정으로 미디언 필터링을 실시하였고 비교 실험을 위해 소벨 에지 추출 기법을 이용하여 퍼지 에지 추출 기법의 성능을 실험하였다. 그 결과 미디언 필터링을 적용한 퍼지 에지추출 기법의 영상이 잡음 제거와 신호의 검출 성능이 우수하게 나타났다.

• 임상간호연구
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• 제20권3호
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• pp.279-289
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• 2014

Purpose: This study was conducted to investigate the relationship between uncertainty in illness and the future, sick role behavior with what diet, weight control, no smoking, abstinence, doctor visits, medications, etc, and quality of life of rehospitalized patients after percutaneous coronary intervention in a cardiology ward. Methods: A total of 120 patients participated in the study. Data were collected using a questionnaire and analyzed using t-test, ANOVA, $Scheff{\grave{e}}$ test, and Pearson's Correlation Coefficient. Results: The mean score for uncertainty was $3.45{\pm}1.08$. Sick role behavior of the patients showed a moderate value with a mean of $3.68{\pm}0.79$. The mean score for quality of life was $3.52{\pm}0.64$. Uncertainty in illness and the future was significantly correlated to sick role behavior with that diet, weight control, no smoking, abstinence, doctor visits, medications, etc (r=-.27, p=.002), and quality of life (r=-.35, p<.001), and sick role behaviors were significantly correlated to quality of life (r=.62, p<.001). Conclusion: The results implicate that there is a need to decrease the levels of uncertainty and reinforce positive behaviors by patients in order to improve their quality of life.

• 중환자간호학회지
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• 제9권2호
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• pp.24-35
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• 2016

Purpose: This study investigated the degree of stress, depression, mindfulness and life satisfaction of elderly patients who had undergone percutaneous coronary intervention (PCI) and identified factors influencing life satisfaction. Methods: Participants were 106 patients over 60 years who had undergone PCI in a university hospital. Results: The mean scores for stress, depression, mindfulness, and life satisfaction were $9.10{\pm}2.53$, $7.77{\pm}3.32$, $88.57{\pm}8.47$, and $17.40{\pm}5.38$ respectively. There were statistically significant differences in life satisfaction by main source of income (F = 4.74, p = .004) and perceived health status as compared with peer (F = 4.80, p = .010). Depression (p < .001) explained 38 % of the total variance of life satisfaction, and the explanatory power increased to 42 % when mindfulness (p = .035) was added. There were significant correlations among stress, depression, mindfulness and life satisfaction of the patients. Conclusions: Depression and mindfulness were significant influencing factors on subjects' satisfaction in life. To enhance the life satisfaction of the elderly patients after PCI, it is necessary to reduce depression and to develop mindfulness-based interventions.

• 임상간호연구
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• 제16권2호
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• pp.5-16
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• 2010

Purpose: The purpose of this study was to develop a motivational enhancement therapy (MET) for coronary artery disease (CAD) patients in early stages of health behavior change and evaluate its effects on health motivation, the stages of change, health behaviors, and cardiovascular risk factors. Methods: Using a non-equivalent control pre-post design, the study was conducted on 42 CAD patients who underwent medical treatment or percutaneous coronary interventions in a hospital. The intervention group (n=21) received the MET (MET 1 during admission, MET 2 after discharge via telephone). The control group (n=21) received a standard care. Data were analyzed using descriptive statistics, ${\chi}^2-test$ and t-test with the SPSS 12.0 program. Results: Participants in the intervention group reported significantly increased scores of health motivation (t=-2.093, p=.043), the stages of change (t=-5.682, p<.001), and health behaviors (t=-3.069, p=.004) and significantly decreased scores of cardiovascular risk factors (t=2.131, p=.039) compared to those of the control group. Conclusion: The findings indicate that the MET is an effective intervention in improving health behaviors and decreasing cardiovascular risk factors for CAD patients.

• 의료커뮤니케이션
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• 제13권2호
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• pp.233-241
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• 2018

Purpose: The purpose of this study was to investigate effects of providing written information for coronary artery disease on health behavior compliance related self-efficacy, knowledge of disease, anxiety, and educational satisfaction depending on patients' health literacy. Methods: The participants in this study were 40 patients who underwent coronary angiography or coronary intervention, and depending on the level of health literacy 30 patients were high group and 10 patients were low group. Each group was evaluated on health behavior compliance related self-efficacy, knowledge of disease, anxiety, and educational satisfaction with providing written information. Results: By providing written information in the group with high health literacy, there was a significant difference in health behavior compliance related self-efficacy, knowledge of disease, but there was no significant difference in anxiety variable. On the other hand, there was no significant difference in health behavior compliance related self-efficacy, knowledge of disease, and anxiety by providing written information in the group with low health literacy. Also, there was no significant difference in the educational satisfaction between high and low group of health literacy after providing written information. Conclusion: It is necessary to develop educational materials that can be applied to clinical nursing field with considering health literacy of patients with coronary artery disease. In addition to providing written information, it is also necessary to develop other educational intervention programs such as video and personalized counseling that may be helpful for coronary patients with low health literacy and investigate their effectiveness.

• Journal of Yeungnam Medical Science
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• 제35권1호
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• pp.121-126
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• 2018

Coronary spasm generally occurs in patients with minimal atherosclerotic plaque lesion, and it has a rather favorable prognosis. However, in some cases, coronary spasm may induce myocardial infarction and even sudden cardiac death (SCD). Here, we report a case in which multi-vessel intractable coronary vasospasm suddenly occurred in a diffuse atherosclerotic lesion after percutaneous coronary intervention (PCI) in a patient with aborted SCD. We identified the characteristics of the spasm portion in intravascular ultrasound (IVUS) images and conducted percutaneous cardiopulmonary bypass support-PCI with stenting as treatment. Intima and media thickening and a large attenuated plaque burden with rupture were identified in IVUS images at the obstructive spasm portion.

• Journal of Chest Surgery
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• 제56권5호
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• pp.359-361
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• 2023

Coronary ostium obstruction due to dislodgement of the prosthetic valve is a rare and life-threatening complication, and particular caution is required for sutureless aortic valve replacement (AVR) with concomitant valvular surgery. In general, coronary artery bypass surgery is performed when coronary ostium obstruction occurs after AVR, but other options may need to be considered in some cases. Herein, we present a case of coronary artery occlusion in an 82-year-old female patient who had undergone AVR and mitral valve replacement for aortic valve stenosis and mitral valve stenosis at the age of 77 years. A hybrid procedure involving redo AVR and percutaneous coronary intervention after left main coronary ostium endarterectomy was performed. To summarize, we present a case of hybrid AVR in a patient with coronary artery obstruction after AVR that was successfully managed using this method.

• 성인간호학회지
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• 제22권3호
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• pp.322-328
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• 2010

Purpose: The purpose of this study was to investigate the effects of an individualized cardiac health education on self-care behavior and serum cholesterol levels patients with coronary artery disease. Methods: Twenty-two patients in the intervention group and 22 in the control group were assigned randomly in this study. The intervention group received an individualized cardiac health education program which consisted of four different sessions for a total of four sessions. Specifically, two sessions occurred during the patients' hospitalization with a third session at the time of discharge with a fourth session scheduled via telephone one week post discharge. Data were collected through a questionnaire for self-care behavior and a blood test for total cholesterol at the time of admission and the two weeks after discharge. The questionnaire for self-care behavior was a standardized instrument and serum cholesterol was measured by Accutrend GC (Roche, Germany). Results: Self-care behavior scores included diet, medication, exercise, risk factor, blood pressure measurement, and visits to hospital were significantly more in the experimental group compared to the control group. Conclusion: The above findings indicate that the individualized cardiac health education was effective in increasing of self-care behavior.

• 한국광학회지
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• 제26권1호
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• pp.1-8
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• 2015

심혈관 질환은 심장마비의 가장 흔한 원인으로 관상동맥의 협착으로 심근에 산소와 영양분을 제대로 공급하지 못하게 되어 발생하게 된다. 이를 내과적으로 치료하기 위해 심혈관 중재술이 시행되는데 이때 스텐트 삽입 여부, 위치, 크기, 그리고 스텐트 삽입 후 혈관벽과의 밀착 여부를 평가하기 위해 혈관 내 광간섭단층촬영(OCT, optical coherence tomography) 내시경 진단검사를 시행한다. 본 논문에서는 이러한 심혈관 OCT 원리와 기술 동향, 그리고 실제 의료현장에서 심혈관 OCT의 임상적 응용 및 활용가치를 소개하고자 한다.

• Advances in biomechanics and applications
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• 제1권4호
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• pp.279-292
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• 2014

This paper presents some simulations of fluxes and pressures in the coronary network, in the case of very severe coronary disease (several stenoses on the left branches and total occlusion of the right coronary artery). In that case, coronary artery bypass graft surgery is the commonly performed procedure. However, the success of the intervention depends on many factors. Modeling of the coronary circulation is thus important since it can help to understand the influence of all these factors on the coronary haemodynamics. We previously developed an analog electrical model that includes the eventual presence of collateral flows, and can describe the different revascularization strategies (two grafts, three grafts, ...). The aim of the present work is to introduce in our simulations the time-dependence of the coronary microvascular resistances, in order to better represent the effect of the systolic ventricular contraction (which induces an elevation of the resistances because the vessels are squeezed).