Outcomes of Surgical Atrial Fibrillation Ablation: The Port Access Approach vs. Median Sternotomy

박원균,이재원,김준범,정성호,주석중,정철현 대한흉부외과학회 2012 Journal of Chest Surgery (J Chest Surg) Vol.45 No.1

Background: The aim of this study is to evaluate the clinical and rhythm outcomes of atrial fibrillation (AF) ablation through a port access approach compared with sternotomy in patients with AF associated with mitral valve diseases. Materials and Methods: From February 2006 through December 2009, 135 patients underwent biatrial AF ablation with a mitral operation via either a port-access approach (n=78, minimally invasive cardiac surgery [MICS] group) or a conventional sternotomy (n=57, sternotomy group). To adjust for the differences in the two groups’ baseline characteristics, a propensity score analysis was performed. Results: After adjustment, there were no significant differences in the two groups’ baseline profiles. The cardiopulmonary bypass time was significantly longer (p=0.045) in the MICS group (176.0±49.5 minutes) than the sternotomy group (150.0±51.9 minutes). There were no significant differences (p=0.31) in the two groups’ rate of reoperation for bleeding (MICS=6 vs. sternotomy=2, p=0.47) or the requirement for permanent pacing (MICS=1 vs. sternotomy=3). The major event-free survival rates at two years were 87.4±8.1% in the MICS group and 89.6±5.8% in the sternotomy group (p=0.92). Freedom from late AF at 2 years was 86.8±6.2% in the MICS group and 85.0±6.9% in the sternotomy group (p=0.86). Conclusion: Both the port-access approach and sternotomy showed tolerable clinical outcomes following biatrial AF ablation with mitral valve surgery.

Large Chronic Pseudoaneurysm of Left Ventricle Complicating Anterior Myocardial Infarction

박원균,Dae Hyun Kim,조상호 대한심장학회 2018 Korean Circulation Journal Vol.48 No.8

의학교육에서 예술의 활용

박원균,Park, Won Kyun 연세대학교 의과대학 2015 의학교육논단 Vol.17 No.3

운동부하 및 각종 신체조건이 혈압 및 ECG에 미치는 영향 -제2보- (각종 Stress에 의한 심전도 변화)

박원균,채의업,Park, Won-Kyun,Chae, E-Up 대한생리학회 1982 대한생리학회지 Vol.16 No.2

We studied this experiment to compare the effects of exercise and other body conditions: i.e., Flack test, cold pressor test and bicycle ergometry on the electrocardiogram. We had sixty healthy college students who were thirty nine men and twenty one women. Their $mean{\pm}SD$ values of physical characteristics were as follows: age; $22.0{\pm}1.4$, weight; men $61.7{\pm}5.6\;kg$, women $46.2{\pm}7.47\;kg$. We observed the changes of P-Q and Q-T interval, R and T amplitude, mean QRS vector, S-T segment deviation, and P and T vector. The result obtained were summarized as follows: P vector was shifted rightward regardless of the type of stress. T vector was shifted var-in each stress but in the bicycle ergometry T vector was shifted leftward. Mean QRS vector was shifted rightward immediately after the bicycle ergometry. Percentage of the occurrence of the depression of S-T segment was 21.7% at the immediately after the submaximal bicycle ergometry in lead II. The elevation of S-T segment was often observed after the mild stresses. Increased amplitude of T wave in the cold pressor test and decreased amplitude of T wave in the bicycle ergometry were observed. In the bicycle ergometry and other stresses, the precise mechanism of S-T segment changes was unexplained but insufficient repolarization in base or apex of the left ventricle due to heart strain was indicated by so called S-T vector analysis.

Cardiac Angiosarcoma on the Right Atrium: Two Cases

박원균,정성호,임주영 대한흉부외과학회 2012 Journal of Chest Surgery (J Chest Surg) Vol.45 No.2

We detected two cases of right atrial angiosarcoma that had a similar appearance on imaging studies. Although the surgical findings were similar for the two patients, one had a clear resection margin, while the other had tumor cells in the resection margin on frozen biopsy. We suggest that preoperative data on magnetic resonance imaging and computed tomography in patients with angiosarcomas may not predict the exact extent of surgical resection or prognostic outcomes.

한·중 외교관계 변화에 따른 한·중 군사협력 증진 방안

박원균 미래군사학회 2018 한국군사학논총 Vol.7 No.2

This study analyzed the process of military exchange and entente, a sub-category of military cooperation through historical cases according to changes in diplomatic relations between Korea and China since the establishment of bilateral diplomatic relations in 1992. Through this, the study explored ways to promote military cooperation between the two countries. In the past, China was perceived as a communist country and also a hostile country considering its relations with North Korea. However, in the midst of changes in international political environment and materialization of global politics, Korean-Chinese military cooperation has made a lot of progress along with the development of bilateral diplomatic relations. Therefore, this study substantiated the development process by analyzing cases of Korean-Chinese diplomatic relations, military exchanges and military cooperation that have developed following China's strategic stages of partnership since the establishment of bilateral diplomatic relations in 1992. Based on the results of analysis, the study presented proposals for matters to be developed to promote bilateral military cooperation in three areas. First, military cooperation based on MOU. Second, military cooperation for joint preparation for threats and increase in confidence. Third, establishment of an organizational system for military cooperation. This study was undertaken to promote both countries’ national interests and peace on the Korean Peninsula through promotion of bilateral military cooperation. Therefore, the results of this study are expected to lay a cornerstone for the development of Korean-Chinese military cooperation that can contributes to the establishment of a peace regime on the Korean Peninsula.

비강폐쇄가 백서의 안면두개골 성장에 미치는 영향에 대한 실험적 연구

박원균,이기수 慶熙大學校 齒科大學 1989 慶熙齒大論文集 Vol.11 No.-

The purpose of this study was to investigate the effects of induced nasal obstruction on the craniofacial skeleton of the growing rats. Minty five Sprague-Dawley rats of four weeks of age were divided into three groups of which the first group got the one naris occluded, the second group was on both nares occluded, and the third served the control. The experimental animals were sacrified 2, 5, 8, 12 weeks after occlusion of nasal airway by means of electrocauterization followed by preparation of dry skulls, measurements, and statistical analyses. The findings were as follows 1. The body weight increments in two nasal obstruction groups were significantly lower than the control group 2 The bilaterally occluded group showed the smallest size in the magnitide of craniofacial skeleton, then unilateral occluded group and control group in order . 3. The dimensional difference in craniofacial skeleton between experimental and control groups were the most outstanding at 5 weeks of experiment in length, and 8 weeks. of experiment in width. 4. In spite of various significant dimensional differences among the groups, no distinct description upon the interrelation between the oral respiration and its impact on the craniofacial growth could be drawn in the very experimental design.

의학교육기관의 학생연구: 왜 우리는 학생연구를 말하는가?

박원균,Park, Won Kyun 연세대학교 의과대학 2015 의학교육논단 Vol.17 No.2

Student research has been proposed as an educational strategy to fulfill the current requirements in basic medical education (BME) and to compatible with the self-directed development of professionalism. It is commonly accepted that the goals of student research are to develop the competencies of critical, reflective, and self-directed thinking; problem-solving; and creativity; as well as to acquire the skills necessary to search for information and analyze the literature; to cultivate the talent of mastering a specialized field through deeply intensified learning; and to establish close relationships between students and supervisors. To successfully implement student research, authorities on BME should to plan the procedure for the student research projects and allocate personal and material resources adequately in order to provide the opportunity for self-evaluation and reflection through the completion of daily records, to develop the habit of consistently evaluating one's own study, and to maintain a collegial relationship between students and supervisors by offering the proper feedbacks in a timely and consistent manner. In conclusion, despite several obstacles and difficulties in the establishment of successful student research projects, student research could provide students the motivation to develop themselves into expert academic researchers, and play a role in educating students to help solve patients' problems based on scientific evidence in the future.

입소장병에서의 히로뽕 남용 실태조사

박원균 ( Won-kyung Park ),손석준 ( Seok-joon Sohn ) 국군의무사령부 1991 대한군진의학학술지 Vol.22 No.1

수동적 체위변화에 의한 체 및 폐혈관계의 혈역동학적 변화와 항콜린성 약물의 영향

박원균(Won-Kyun Park),배재훈(Jae-Hoon Bae),송대규(Dae-Kyu Song),채의업(E Up Chae) 한국항공우주의학협회 1997 항공우주의학회지 Vol.7 No.1