심실전도장애환자에서 위상각 분석의 의의

전은석,곽병수,이강욱,박종훈 충남대학교 의과대학 지역사회의학연구소 1993 충남의대잡지 Vol.20 No.2

It is known that the normal His-Purkinje system provides for nearly synchronous activation of the right and left ventricles. When this His-Purkinje conduction is abnormal, the resulting sequence of the both ventricular contraction should be changed. These abnormal mechanical consequences resulting from abnormal conduction system have been difficult to demonstrate because these are very rapid and complex. We evaluate the phase angle analysis using radionuclide gated blood pool scan(GBP) as a quantitative method which can determine the asynchronous contraction of left ventricule in patients with complete left bundle branch block(C-LBBB, 20 cases) and complete right bundle branch block(C-RBBB, 15 cases). The results as follows : 1) The ejection fractions, peak ejection rates, in GBP were significantly decraesed in patients with C-LBBB compared with controls(10 cases, 70± 4.2 vs 44± 13.9%, 3.51± 0.62 vs 2.48± 0.98, p<0.05 by t-test respectively). The peak filling rates were also decreased in patients with C-LBBB(3.38± 0.92 vs 1.76± 0.71, 1A.05). 2) In the phase angle analysis, the standard deviations and the width of half maximum of phase angle were significantly increased in patients with C-LBBB(8.6± 1.8 vs 20.6± 18.1, 16.0± 3.9 vs 22.5± 9.2, p<0.05 by t-test respectively). And the ranges of phase angle were also increased in C-LBBB(51.3± 5.4 vs 95.7± 31.7, p<0.05). 3) But there were no significant differences in GBP and phase angle analysis between patients with C-RBBB and controls. As the results above, it can be concluded that the phase angle analysis can provide an accurate noninvasive method to detect the asynchronous contraction in patients with abnormal intraventricular electrical activation.

심방세동환자에서의 Amiodarone의 치료효과

전은석 충남대학교 의과대학 지역사회의학연구소 1988 충남의대잡지 Vol.15 No.2

To evaluate the efficacy of amiodarone in the treatment of atrial fibrillation and the determinants for predicting success or failure of amiodarone therapy, 26 patients with atrial fibrillation were treated with oral amiodarone (loading dose 600mg/day for 1 week, maitenance dose 100~200mg/day)and were followed up for 112 days(range 17 to 204)in Chungnam National University Hospital from May to Nov., 1988. The results were as follows 1. The pateints were 16 to 71 years old(mean 54) and consis ted of 18 men and 8 women. 2. The underlying heart disease were valvular heart disease( 8 patients), hypertension(6 patients), cardiomyopathy(5 patients) and constrictive pericarditis(1 patient). There were 7 patients who had no identifiable organic heart disease. 3. In 10(38.5%)of 26 patients, atrial fibrillation converted spontaneously to sinus rhythm within 20 days(range 4 to 77)after intiation of amiodarone and of above 10 patients, 9 maintained normal sinus rhythm for 110 days(range 17 to 204). 4. Age, sex and underlying heart disease did not appear to be as important factors in the treatment of atrial fibrillation with amiodarone. 5. The conversion rate of atrial fibrillation to sinus rhythm was higher in 17 patients with left atrial diameter of 55 mm or less than in 6 patients with left atrial diameter of 56 mm or larger(41% vs 17%, p<0.05). 6. Amiodarone was successful in 10(50%)of 20 patients with the duration of atrial fibrillation <1 year and failed in 6 patients with atrial fibrillation longer than 1 year(p<0.05). 7. The adverse effects of amiodarone were sinus bradycardia (4 patients), tremor (2 patients), fatigue (1 patient), insomnia (1 patient) and indigestion (1 patient).

Virus Associated Hemophagocytic Syndrome 3례

전동석,황종문,김준식,서은숙,강진무 啓明大學校 醫科大學 1990 계명의대학술지 Vol.9 No.3

Virus associated hemophagocytic syndrome is characterized by a benign generalized histiocytic proliferation with marked hemophagocytosis associated with systemic viral infectioin. The syndrome is a non-neoplastic, potentially reversible process and manifested fever, severe constitutional symptoms, hepatosplenomegaly, and lymphadenopathy, and characterized by laboratory findings of pancytopenia, hemophagocytosis and abnormal liver function test and coagulopathy. Immunosuppressive and cytotoxic therapy are contraindicated because of increasing risk of fatal outcome. The authors experienced three cases of virus associated hemophagocytic syndrome diagnosed by clinical features, bone marrow aspiration and lymph node biopsy. All cases had higt fever, hepatosplenomegaly and lymphoadenopathy and showed granulocytopenia in peripheral blood and phagocytized histiocytes in bone marrow. The brief review of the literatures was made.

동적 후보영역과 이중 템플릿매칭을 이용한 차량 번호판 추출 및 인식

전진석,이은주 한밭대학교 정보통신전문대학원 2003 정보통신전문대학원 논문집 Vol.1 No.1

본 논문에서는 획득한 차량 영상에서, 차량 번호판의 후보영역을 동적으로 할당하여 번호판을 추출하고, 이중 템플릿 매칭을 이용하여 인식하는 방법을 제안하였다. 차량 번호판은, 이 영역이 다른 영역에 비해 영상의 흑백 변화 밀도가 높다는 것을 근거로, 번호판 후보영역을 투영하여 영상 밀도의 기준 밀도와의 차에 의하여 추출된다. 번호판 영역 추출을 실패하면, 다시 동적으로 가장 가능성이 높은 영역을 번호판 후보영역을 결정하였다. 추출된 번호판 영역에서 영역정보에 의하여 문자와 숫자영역을 분리하고,문자와 숫자의 인식은 분할된 입력 패턴과 표준패턴을 흑화소 정보에 의하여 1차 매칭하고, 유사도가 높은 표준패턴과 다시 백화소 정보에 의하여 2차 매칭하는 이중 템플릿 매칭에 의하여 하였다. In this paper, we proposed method to extract vehicle license plate by assigning dynamically candidate area, and to recognize using double template matching in captured vehicle image. We extracted vehicle license plate using density difference of candidate area and reference, because the image density of candidate area is high than other. If it failed to extract in this process, we determine dynamically candidate area. We recognized characters and numbers on plate by double template matching of input pattern and references. Then it matched black pixels first, and white next.

영구형 심박조율기의 조율역치의 변화에 관한 연구

전은석 충남대학교 의과대학 지역사회의학연구소 1990 충남의대잡지 Vol.17 No.2

To observe the serial changes of the pacing thresholds in patients with unipolar, multiprogrammable permanent pacemaker(Optima-MP, Teletronics Pty. Ltd.). A noninvasive Vario system was used at the time of implantion and during follow-up periods (2 months-2 years). The initial pacing thresholds were 0.74±0.20 volt(0.35-1.10 volt) and the initial safty margins were 59.4±48.5 (29-204). The pacing thresholds increased to 1.28±0.4 volt after 2 weeks, after then there were no further changes in the pacing thresholds and safty margins during follow-up periods(upto 2 years). As the resulrs above, it can he concluded that the Vario system is very useful for the measurement of the long-term pacing threshold and the pacing threshold remains constant beyond 2 months after implantation.

심방세동환자에서의 혈전색전증에 관한 임상적 고찰

전은석 충남대학교 의과대학 지역사회의학연구소 1989 충남의대잡지 Vol.16 No.2

On retrospective review of medical records of 420 patients with atrial fibrillation(AF), 59 cases(14%) experienced cerebra or peripheral embolisms(5 cases) in their medical history(13.5%), or at the time of first visit(56%) or during follow-up period after documented AF(31%). The underlying diseases of AF were valvular heart disease(55%), cardiomyopathy(13%), hypertension(6%), congestive heart failure, hyperthyroidism(3%), constrictive pericarditis, congenital heart disease(2%) and chronic obstructive lung disease(0.2%), 16% of these patients had no causative disease(long AF, 43 cases). There were no significant differences between incidence of embolism and age, sex, underlying disease, left artial size. The mean left artial anteroposterior diameter in M-mode echocardiography was larger in the group of patients with heart disease(n=221) than in those of lone AF(n=43) (52.5±11.0㎜ vs 4.7±7.9㎜, p<0.005) and the patients with heart disease were younger than those with lone AF(48.3±14.1 vs 61.6±10.5, p<0.005). In spite of these differences between two groups, the incidence of embolism didnot differ. All patients(13 cases) experienced a embolism after documented AF had underlying heart disease. It can be concluded that the incidence of thromboemlism is high in patients with AF and routine anticoagulants therpy will be needed, especially in the patients with heart disease.

고지혈증에서의 Pravastatin의 임상효과

전은석,박종훈 최신의학사 1992 最新醫學 Vol.35 No.11

당뇨병 및 간병변증 환자에서 발생한 Fusarium verticllioides에 의한 피부 감염 1예

이석종,전영민,원지연,송은섭,최용우,김한욱 예수병원 1998 예수병원학술지 Vol.19 No.-

당뇨병 및 간경변증 환자에서 발생한 Fusarium verticillioides에 의한 피부 감염 1예

이석종,전영민,원지연,송은섭,최용우,김한욱 대한의진균학회 1997 대한의진균학회지 Vol.2 No.1

Fusarum species, which are common soil saprophytes, have been implicated as a pathogen causing a variety of opportunistic infections such as keratitis, onychomycosis, burn wound infection or disseminated systemic infections in immunocompromised hosts. We report a case of cutaneous infection caused by F. verticillioides in a 59-year-old man, with a long history of diabetes mellitus and alcoholic liver cirrhosis. He presented with a few papules and fluctuant cutaneous nodules on both forearms traumatized by woodstick 4 months ago. The diagnosis of F. verticillioides infection was established by histopathologic examination and findings of tissue cultures.

고지혈증에 대한 Lovastatin (Mevacor ??)의 치료효과

김영건,전은석,구대회 충남대학교 의과대학 지역사회의학연구소 1990 충남의대잡지 Vol.17 No.2

To evaluate the lipid lowering effect of lovastatin a hydroxy methylglutaryl coenzyme A(HMG CoA) reductase, 18 hyperlipidemic patients were medicated with Mevacor^?? (20-40mg q. d) for 4 weeks in Chungnam National University Hospital. The results were as follows : 1. The serum total cholesterol decreased after 2 and 4 weeks of medication. (278±29 vs 220±37, 190±29mg/dl, p<0.05). 2. The serum triglyceride also decreased after medication(244±102 vs 210±118, 158±72 mg/ml, p<0.05). 3. The HDL cholesterol increased after 4 weeks medication(47±15 vs 60±16mg/dl, p<0.05). 4) The calculated LDL cholesterol decreased after medication(183±29 vs 125±39, 99±28 mg/dl, p<0.05). 5. There were no significant side effects except headache in one patient. As the results above, lovastatin(Mevacor^??)is a safe and very effective lipid lowering agent for the treatment of hyperlipidemia.