• Journal of Computing Science and Engineering
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• v.8 no.2
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• pp.87-93
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• 2014

Coronary artery disease (CAD) is currently a prevalent disease from which many people suffer. Early detection and treatment could reduce the risk of heart attack. Currently, the golden standard for the diagnosis of CAD is angiography, which is an invasive procedure. In this article, we propose an algorithm that uses data mining techniques, a fuzzy expert system, and the imperialist competitive algorithm (ICA), to make CAD diagnosis by a non-invasive procedure. The ICA is used to adjust the fuzzy membership functions. The proposed method has been evaluated with the Cleveland and Hungarian datasets. The advantage of this method, compared with others, is the interpretability. The accuracy of the proposed method is 94.92% by 11 rules, and the average length of 4. To compare the colonial competitive algorithm with other metaheuristic algorithms, the proposed method has been implemented with the particle swarm optimization (PSO) algorithm. The results indicate that the colonial competition algorithm is more efficient than the PSO algorithm.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.3
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• pp.625-633
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• 2009

This study was conducted to assess the distribution of coronary risk factors(CRF) and evaluate the risk profile of coronary heart disease by the clustering of the CRF in health checkup examinees. The study sample consists of 3,345 adults aged 30s-60s years(1,917 males, 1,428 females), not recognized as taking medicines for or having cardiovascular diseases, who underwent health package check-up at the health examination center of a university-affliated hospital in Daejon City. The proportion of subjects with 1, 2, 3, 4 and or more risk factors were 27.6%, 26.5%, 16.9% and 9.1%, respectively, therefore, the 80.0% of total subjects had at least one more risk factor. From these findings, this study concluded that the prevalence rates of CRF were relatively high. These data provide further evidence that the early intervention for coronary health prevention and promotion in general adult population is necessary at the population level.

• The Korean Journal of Nuclear Medicine
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• v.25 no.2
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• pp.177-185
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• 1991

Dipyridamole thallium imaging is one of the most widely accepted means of evaluating patients with suspected or known coronay artery disease. The results of thallium imaging help diagnose coronary artery disesse (CAD), determine the hemodynamic significance of coronary stenosis, evaluate viability of myocardium, assess the outcome of therapeutic interventions and stratify patients according to their risk for luther cardiac events. An increased lung thallium uptake and transient LV dilation has been reported as poor prognostic indicator and associated with extensive and severe coronary artery disease. We quantitated lung/heart uptake ratio (l/HUR) and transient left ventricular dilation ratio in 44 patients and 17 controls undertaking dipyridamole thallium-201 scintigraphy. The results are as follows: 1) The lung/heart uptake ratio was high in patients with CAD and which became higher according to increasing number of diseased vessel. The L/HUR of patients with low LVEF (<35%) was lower than those with normal LVEF. 2) Transient left ventricular dilation ratio of CAD patients had no close relation between numbers of diseased vessels and was not higher than normals. But transient left ventricular dilation ratio of patients with myocardial infartion was higher than normals. We concluded that lung/heart uptake ratio seems to be sensitive marker for severity of CAD and myocardial function, but transient left ventricular dilation ratio alone is not sufficient to be a marker for severe and extensive CAD.

• Korean Journal of Psychosomatic Medicine
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• v.3 no.2
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• pp.185-196
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• 1995

The author reviewed cognitive-behavioral approach to A type behavior pattern and hypertension which are known to be risk factors for coronary heart diseases. Those cognitive distortions frequently found in persons with A type behavior include all-nothing thinking, selective attention, personalization, and attribution of causality. Cognitive-behavioral techniques were also described, which can be applied to management of each characteristic of A type behavior pattern such as time urgency, perfectionism, achievement striving, low self-esteem, excessive work involvement, hostility, and depression. Cognitive-behavioral intervention for hypertension might help the patients to recognize and monitor anger-engendering conflicts, identify characteristic styles of responding, and experiment with alternative ways of managing conflict and anger. Since different features predominate in different individuals, it is necessary to develop treatment plan on the basis of individual characteristics and problems.

• Health Policy and Management
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• v.28 no.2
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• pp.168-177
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• 2018

Background: This study investigates the potential volume and outcome association of coronary heart disease (CHD) patients who have undergone percutaneous coronary intervention (PCI) using a large and representative sample. Methods: We used a National Health Insurance Service-Cohort Sample Database from 2002 to 2013 released by the Korean National Health Insurance Service. A total of 8,908 subjects were analyzed. The primary analysis was based on Cox proportional hazards models to examine our hypothesis. Results: After adjusting for confounders, the hazard ratio of thirty-day and 1-year mortality in hospitals with a low volume of CHD patients with PCI was 2.8 and 2.2 times higher (p=0.00) compared to hospitals with a high volume of CHD patients with PCI, respectively. Thirty-day and 1-year mortality of CHD patients with PCI in low-volume hospitals admitted through the emergency room were 3.101 (p=0.00) and 2.8 times higher (p=0.01) than those in high-volume hospitals, respectively. Only 30-day mortality in low-volume hospitals of angina pectoris and myocardial infarction patients with PCI was 5.3 and 2.4 times those in high-volume hospitals with PCI, respectively. Conclusion: Mortality was significantly lower when PCI was performed in a high-volume hospital than in a low-volume hospital. Among patients admitted through the emergency room and diagnosed with angina pectoris, total PCI volume (low vs. high) was associated with significantly greater cardiac mortality risk of CHD patients. Thus, There is a need for better strategic approaches from both clinical and health policy standpoints for treatment of CHD patients.

• Journal of Korean Academy of Nursing
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• v.38 no.1
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• pp.19-28
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• 2008

Purpose: The purpose of this paper was to examine the relationship between type D personality and cardiovascular disease, and to suggest future research directions. Method: A literature search was conducted from the following nine databases: 1) MEDLINE, 2) CINAHL, 3) Pubmed Unrestricted, 4) PsycINFO, 5) KISS, 6) RICHIS, 7) RISS4U, and 8) Nanet. The combinations of the words, "type D personality", "personality", "heart", "cardiovascular", and "coronary" were used for keyword searches to find relevant articles. Twenty eight studies were identified. Result: Type D personality has been associated with increased morbidity and mortality in patients with established cardiovascular disease. Type D patients are also at increased risk for impaired quality of life, and seem to benefit less from medical and invasive treatment. Conclusion: There is substantial evidence for a relationship between type D personality and clinical outcomes related to cardiovascular disease. Randomized clinical trials are needed to further evaluate the value of controlling type D personality to improve survival and reduce morbidity in patients with cardiovascular disease. Accumulating evidence from this analysis indicates the urgent need to adopt a personality approach in order to optimize the identification of patients at risk for stress related cardiac events.

• Journal of Yeungnam Medical Science
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• v.13 no.2
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• pp.225-233
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• 1996

From August 1992 to July 1996, 63 consecutive patients underwent coronary artery bypass surgery. The mean age of these patient was 57 years(range form 30 to 71years). There were 44 men and 19 women. Preoperative 12 patients had stable angina pectoris and 23 patients were unstable angina pectoris. 8 patients had previous myocardial infarctation history and emergency or urgent myocardial revascularization were performed in 9 cases. In the risk factors of coronary atherosclerosis, 25 patients(40%) were hypercholesterolemia, 38 patients(60%) have smoking history and 19 patients(30%) have hypertension history. In the patterns of disease, 9 patients were single vessel disease, 18 patients were two vessele disease and 33 patients were three vessel disease. We performed total 284 distal anastomosis(mean 3.5 anastomosis per patient) and performed one case of ascending aorta graft interposition, two cases of mitral valve replacement, one case of aortic valve replacement, one case of ventricular septal defect repair and one case of atrial septal defect repair and the mean aortic cross clamp time was 115.3 minutes. The common complications were arrhythmia(7cases), wound infection(5cases), perioperative myocardial infarction(4cases), reoperation for bleeding control(4cases) and stroke(4cases). There were six hospital deaths due to low cardiac output syndrome, ventricular arrhythmia and respiratory failure. In the evaluation of operative risk factors, preoperative intravenous nitroglycerin requirement and prolonged aortic cross clamp tirne(>2hours) were found to be predective factor of morbidity and old age(>65years) was found to be predective factor of mortality.

• Journal of Chest Surgery
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• v.45 no.1
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• pp.45-48
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• 2012

We report a case of a postinfarction ventricular septal defect caused by an acute recurrent occlusion after the implantation of a covered stent, which was performed as a rescue procedure for the ruptured left anterior descending artery during a percutaneous coronary intervention. Although the emergent implantation of a covered stent for the ruptured coronary arteries such as the left main coronary artery or the origins of the left anterior descending artery can be performed during a percutaneous coronary intervention, and a coronary bypass surgery should be considered in order to decrease the risk of complete occlusion, thus providing a superior long term patency.

• Korean journal of food and cookery science
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• v.23 no.6
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• pp.1015-1024
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• 2007

Trans-fatty acids (TFAs) are defined as the sum of all unsaturated fatty acids that contain one or more non-conjugated double bonds in a trans configuration. Dietary trans- fatty acids originate from commercially hydrogenated oils and from dairy and meat fats. From the perspective of the food industry, partially hydrogenated vegetable oils are attractive because of their long shelf life, stability during deep-frying, and semisolidity, which can be customized to enhance the palatability of baked goods and fried foods. Although no definite differences have been documented so far between the metabolic and health effects of industrial and ruminant TFAs, the intake of industrially produced TFA has declined, and in Europe, the majority of TFAs are of ruminant origin. Due to the scientific evidence associating TFA intake with increased risk of coronary heart disease (CDH), the Korea Food and Drug Administration (KFDA) issued a final rule that requires the amount of trans fat present in foods to be declared on the nutrition label, by December 1, 2007. In addition, many food manufacturers who use partially hydrogenated oils in their products have developed, or are considering ways, to reduce or eliminate trans-fatty acids from certain food products.

• Korean Journal of Psychosomatic Medicine
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• v.14 no.2
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• pp.81-87
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• 2006

A lot of studies have investigated the role of psychosocial and behavioral risk factors in the etiology and pathogenesis of cardiovascular disease. On the basis of prospective population studies that found a relationship between Type A behavior and cardiac morbidity and mortality independent of traditional risk factors, Type A behavior was declared a risk factor for the development of coronary heart disease. Additionally, recently proposed, a new personality construct, Type D personality have been reported to be associated with the increased risk for cardiovascular morbidity and mortality. In Korea, however, there were few studies about these issues. This article attempts to provide an overview of accumulating evidences on the Type A behavioral pattern and Type D personality related with cardiovascular disease to offer new directions for research.