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윤봉영,안재희,이관호,정재천,이현우,박이태,한승세,황미수,남혜주,이태숙 대한내과학회 1990 대한내과학회지 Vol.38 No.3
Thymolipoma is a rare benign tumor composed of thymic tissue and mature adipose elements and constitutes 2~9% of all thymic tumors. Most cases of thymolipoma is asymptomatic and are detected on routine chest X-rays. It is often misread as cardiac disease. The diagnosis is very difficult without operation. With the introduction of CT for the diagnosis of mediastinal disease recently, pathologic diagnosis could be expected preoperatively. A case of thymolipoma was treated at Yeung-Nam University Hospital. Its pathologic diagnosis was expected preoperatively with chest X-ray and chest CT, and confirmed postoperatively.
정상인 20 대 남자에서 Holter 심전도를 이용한 부정맥에 관한 연구
윤봉영(Bong Young Yoon),이정미(Jung Mee Lee),김영조(Young Jo Kim),심봉섭(Bong Sup Shim),이현우(Hyun Woo Lee) 대한내과학회 1991 대한내과학회지 Vol.41 No.4
N/A A 24-hour Holter EK(i was monitored, during ordinary activities, on 51 medical students and interns without heart or other systemic diseases in order to compare the difference of arrythmia between waking and sleeping hours. During waking hours, the mean, maximal and minimal heart rates were 85.8±7.2/min, 144.9±14.2/min, and 52.0±5.9/min, respectively; during sleeping hours, they were 65.2±9.6/min, 128.5±11.6/min, and 47.1±7.3/min. During sleep the mean heart rate was found to be significantly slow. Sinus arrythmia was noted in all subjects without a difference in sleeping and waking periods, and no sinus pause (more than 2.0 seconds) was noted. Twenty subjects (39.2%) showed supraventricular premature beat. Arrythmia was noted in 15 subjects (75%) during waking, 2subjects (10%) during sleeping, and 3subjects (15%) during both waking and sleeping hours. Ventricular premature beat was noted in 13subjects (25.5%), and this arrythmia was noted in 12subjects (92.3%) during waking and 1 subject (7.7%) during sleeping hours. No case developed VPB`s during the sleeping period alone. Atrioventricular conduction defect was noted in 5subjects (9.8%), and all were noted during the sleeping period. Among them Morbitz type I (Wenckebach block) A-V block was noted in 4subjects (80%) and first-degree A-V block in 1 subject (20%).
상행 대동맥 동맥류를 동반한 Marfan씨증후군 환자에서 생긴 대동맥 박리(Aortic Dissection) 1례
윤봉영,양창헌,김영조,심봉섭,이현우,류한영,정태은,박이태,한승세 영남대학교 의과대학 1989 Yeungnam University Journal of Medicine Vol.6 No.1
본원에서는 Marfan씨증후군과 대동맥류, 대동맥판 역류로 진단받은 환자가 1년후 흉통을 주소로 내원하여 대동맥 박리로 이행한 것으로 밝혀져 응급수술을 성공적으로 치룬 1례를 경험하였기에 보고하는 바이다. The Marfans syndrome is a generalized connective tissue disease involving eye, musculoskeletal system, cardiovascular system, and inherited autosomal dominant with various expression type. The cardiovascular complications such as aortic aneurysm, aortic dissection, aortic regurgitation, mitral regurgitation and aortic dissection which usually occurs in previously normal sized aorta are poor prognostic factors. However, the aortic dissection which developed in patient with Marfan syndrome and aortic aneurysm was rare. We experienced one case of dissecting aneurysm in patient diagnosed as previous aortic aneurysm, aortic regurgitation, and Marfan syndrome, receiving successful operation.
비스테로이드성 항염증제제에 의한 급성 위점막 손상에 있어 호중구의 역할
김태년,이학준,김준환,정문관,장병익,윤봉영,최준혁 대한소화기학회 2000 대한소화기학회지 Vol.35 No.2
Background/Aims: Gastric mucosal injury caused by nonsteroidal anti-inflammatory drugs (NSAIDs) is one of the most frequent adverse reactions. However, the precise mechanism of such injury remains still unclear. The present study was designed to determine the role of neutrophils in NSAIDs-induced acute gastric mucosal injury. Methods: Indomethacin was used as cyclooxygenase inhibitor. Methotrexate induced neutropenia in rat. Indomethacin was administered to neutropenic rats and controls and then, their acute gastric mucosal injury was assessed. Mucosal eicosanoid formation and gastric mucosal injury were assessed in neutropenic rats or leucovorin $quot;rescue$quot; rats receiving indomethacin. Results: Gastric mucosal lesion induced by indomethacin were significantly reduced in the rats which had been in moderate neutropenic state induced by methotrexate. Moreover, in the methotrexate-induced neutropenia rats, the neutropenia-associated mucosal protection effect against indomethacin-induced mucosal injury could be deserved of leucovorin rescue. Indomethacin caused a significant reduction in gastric mucosal prostaglandin synthesis. Thus, little gastric mucosal lesions were observed in neutropenic rats that were treated with indomethacin, despite the significant inhibition of prostaglandin synthesis. Conculsions: These results suggest that neutrophil takes part in indomethacin-induced acute gastric mucosal injury.
비엔나 컨버터를 위한 단일 반송파를 이용한 새로운 방식의 SVPWM 구현과 PI/PR 전류제어기의 비교
조남수(Nam-Su Cho),지준근(Jun-Keun Ji),이태원(Tae-Won Lee),윤봉영(Bong-Young Yun) 대한전기학회 2017 전기학회논문지 Vol.66 No.3
In this paper, a new method of SVPWM implementation for 3-Phase 3-Leg 3-Level AC/DC converter known as the Vienna converter is proposed. Also the performances of PI and PR controller used in AC input current controller are compared. To verify the proposed method, PSIM, a power electronics simulation program, is utilized. The performances of the proposed new method and the two existing methods are compared through simulation and experiment. Also PI and PR controller in AC input current controller are compared through 10[kW] Vienna converter system.