• 한국임상수의학회:학술대회논문집
• /
• 한국임상수의학회 2008년도 춘계학술대회
• /
• pp.74-74
• /
• 2008

• BMB Reports
• /
• 제49권5호
• /
• pp.270-275
• /
• 2016

The Ubiquitin proteasome system (UPS) plays roles in protein degradation, cell cycle control, and growth and inflammatory cell signaling. Dysfunction of UPS in cardiac diseases has been seen in many studies. Cholesterol acts as an inducer of cardiac hypertrophy. In this study, the effect of proteasome inhibitors on the cholesterol-induced hypertrophic growth in H9c2 cells is examined in order to observe whether UPS is involved in cardiac hypertrophy. The treatment of proteasome inhibitors MG132 and Bortezomib markedly reduced cellular surface area and mRNA expression of β-MHC in cholesterol-induced cardiac hypertrophy. In addition, activated AKT and ERK were significantly attenuated by MG132 and Bortezomib in cholesterol-induced cardiac hypertrophy. We demonstrated that cholesterol-induced cardiac hypertrophy was suppressed by proteasome inhibitors. Thus, regulatory mechanism of cholesterol-induced cardiac hypertrophy by proteasome inhibitors may provide a new therapeutic strategy to prevent the progression of heart failure.

• Journal of Chest Surgery
• /
• 제18권4호
• /
• pp.649-654
• /
• 1985

After first successful mitral valvotomy by Harken and Bailey in 1948, improvement of surgical technique and cardiac device may last rapidly for several years, but there after many patients deteriorate because of various causes, so incidence of reoperation for cardiac valvular disease has increased time by time. This paper is concerned with 21 patients in whom a second operation has been carried out from Jan. 1963 to Aug. 1984 at the department of Thoracic and Cardiovascular department, National Medical Center. Of 21 patients, 7 were male and 14 were female, and ages ranged from 14 to 37 years The second operation are classified into groups of secondary closed mitral commissurotomy [3 cases], open commissurotomy following closed mitral commissurotomy [1 case], Valve replacement following closed mitral commissurotomy [14 cases] or bioprosthetic valve replacement [3 cases]. Main cause of reoperation was restenosis or steno insufficiency, and that of bioprosthetic valve failure was bacterial endocarditis [1 case], fibrous tissue overgrowth on the Xenograft [1 case] and technical failure [1 case]. Early operative mortality was absent, but during follow-up, 4 patients died, so late mortality was 19.0%, and main cause of death was congestive heart failure.

• 대한기계학회논문집B
• /
• 제38권8호
• /
• pp.715-720
• /
• 2014

좌심실보조장치(LVAD)가 심실부하감소에 미치는 영향을 극대화 하기 위해, 심실보조장치 치료를 위한 최적의 심부전 심각도 단계를 찾는 것은 중요하다. 우리는 심부전 정도에 따른 LVAD 의 박동효율을 이론적으로 예측하였다. 우리는 혈관시스템의 6 컴파트먼트의 Wind-kessel 모델과 연동된 심실의 삼차원 유한요소모델을 사용하였다. 이 모델을 이용하여, LVAD 치료 하에서 심부전의 정도에 따라 심실의 수축성 ATP 소모율, 좌심실압력, 심박출량, 심박출 분획, 1 회심박출량 등과 같은 심장응답을 예측하였다. LVAD 치료 중에 에너지학적 부하조건을 암시하는 수축성 ATP 소모율은 5 단계 심부전 조건에서 가장 크게 감소하였다. 따라서, 우리는 LVAD 를 회복으로의 가교로서 고려하고 있을 때, 심부전 5 단계에서 LVAD 치료를 시작하는 것이 가장 적절하다는 결론을 내린다.

• 한국임상수의학회지
• /
• 제26권1호
• /
• pp.17-22
• /
• 2009

피모벤단은 최근에 발견되어, 만성 이첨판 폐쇄부전증에 의한 중등도에서 심한 울혈성 심부전을 관리하는데 유용하게 사용되는 심장성 약물이다. 아직까지 개에서 피모벤단의 효능과 안전성에 대한 의견이 분분하다. 따라서 본 연구는 최적의 효능과 안전성을 알아보기 위하여 만성 이첨판 폐쇄부전증에 이환된 20마리의 개를 평가하였다. 일반적인 심장 약물 처방에 피모벤단을 추가한 뒤 삶의 질, 호흡부전, 순환부전과 심부전의 상태를 방사선과 심초음파 검사와 함께 두 달간 평가하였다. 본 연구에서는 진행된 만성 이첨판 폐쇄부전증에 이환된 개에서 피모벤단이 특별한 부작용 없이 긍정적인 치료 효과를 보이는 것으로 나타났다. 그러나 다른 심장 처방약과 피모벤단의 상호 작용 효과에 중점을 둔 연구와 이첨판 폐쇄부전증이 아닌 다른 심장질병에 의한 개와 다른 동물의 심부전에 어떠한 치료효과를 보이는지 평가하는 추가적인 연구가 필요할 것이다.

• Korean Circulation Journal
• /
• 제53권9호
• /
• pp.621-631
• /
• 2023

Background and Objectives: The morphology-voltage-P-wave duration (MVP) electrocardiography (ECG) risk score is a newly defined scoring system that has recently been used for atrial fibrillation (AF) prediction. The aim of this study was to evaluate the ability of the MVP ECG risk score to predict AF in patients with an implantable cardioverter defibrillator (ICD) and heart failure with reduced ejection fraction in long-term follow-up. Methods: The study used a single-center, and retrospective design. The study included 328 patients who underwent ICD implantation in our hospital between January 2010 and April 2021, diagnosed with heart failure. The patients were divided into low, intermediate and high-risk categories according to the MVP ECG risk scores. The long-term development of atrial fibrillation was compared among these 3 groups. Results: The low-risk group included 191 patients, the intermediate-risk group 114 patients, and the high-risk group 23 patients. The long-term AF development rate was 12.0% in the low-risk group, 21.9% in the intermediate risk group, and 78.3% in the high-risk group. Patients in the high-risk group were found to have 5.2 times higher rates of long-term AF occurrence compared to low-risk group. Conclusions: The MVP ECG risk score, which is an inexpensive, simple and easily accessible tool, was found to be a significant predictor of the development of AF in the long-term follow-up of patients with an ICD with heart failure with reduced ejection fraction. This risk score may be used to identify patients who require close follow-up for development and management of AF.

• 대한영상의학회지
• /
• 제85권2호
• /
• pp.308-326
• /
• 2024

심장 기능의 포괄적인 결과는 심장박출량과 전신 정맥 환류로 표현된다. 심장의 4개의 방실은 각자 고유한 기계적 기능을 가진다. 심장방실과 판막, 폐순환 시스템은 전부하 또는 후부하의 형태로 상호 연관되어 있다. 심장 기능 장애는 전반적인 심장 기능의 실패로 전형적인 임상 증상을 나타낸다. 심장 기능 장애의 근본 원인을 조사하려면 심장 내 혈류 유동 경로에 대한 단계별 평가가 필요하다. 이러한 맥락에서, 심장의 세부 구조를 볼 수 있는 영상검사의 표지자는 심장 기능 평가에 중요한 역할을 한다. 영상기반 평가를 통해 개별 심장 구성 요소의 기능을 단계별로 조사할 수 있다. 심장 기능 평가를 위한 영상검사 중 최근 심장 CT가 포함되고 검증되었다. 본 종설에서는 포괄적 및 단계별 심장 기능 평가를 위한 심장 CT 기반 영상 표지자에 대해 논의하겠다.

• Journal of Chest Surgery
• /
• 제26권12호
• /
• pp.915-919
• /
• 1993

The management of Patent Ductus Arteriosus[PDA] with heart failure and cardiac cachexia in premature infants have been a disturbing and controversial problem in the field of pediatric cardiovascular surgery.We analysed our experiences to determine the rationale of surgical closure of PDA in infants . During a period of 7 years from January 1986 to December 1992, 12 infants under 2 months of age underwent operations for "hemodynamically significant" PDA which had caused severe heart failure.There were 6 male and 6 female patients. Their mean gestational age was 33.8 weeks and their mean body weight was 1990 g. ranged from 710 g. to 2900 g. Mean age at operation was 28.5days. Seven patients had history of Indomethacin trial. All patients were operated with double ligation technique under general anesthesia.There was no mortality and blood transfusion was not necessary in any patient during the operation.In all cases, we could confirm the complete closure of PDA after operation by follow-up echocardiography.Two patients died during their hospital stay and 1 patient died at 6 months after operation. The causes of death were sepsis with congestive heart failure, necrotizing entero colitis and pneumonia respectively.We can not detect any operation related complication which resulted in permanent sequelae as well as delayed complications related to nerve damage. These results indicate that surgical ligation of PDA in infants with severe heart failure is relatively safe and effective.effective.

• Journal of Chest Surgery
• /
• 제23권3호
• /
• pp.482-487
• /
• 1990

The leading cause of death in patients with chronic renal failure is cardiovascular diseases. The problems relevant to cardiac surgery in these patients are occurring more frequently with a growing number of patients at risk. Among these, important risk factors related to uremic patients undergone open heart surgery are fluid and electrolytes imbalance, coagulopathy, increased susceptibility to infection. Since 1968 when Lansing and colleagues reported the first successful aortic valve replacement in patients with chronic renal failure and infective endocarditis, there have been increasing reports of the cardiopulmonary bypass surgery in chronic renal failure patients with acceptable perioperative morbidity and mortality From Jan. 1988 to Nov. 1989 we have experienced four uremic patients necessitating open heart surgery ; one needing a coronary artery bypass graft and the other 3 needed cardiac valve replacement. Based on our observations we would like to suggest followings 1]Intraoperative ultrahemofiltration during C-P bypass thought to be an excellent means for the control of hyperkalemia and fluid balance. 2] The immediate postoperative application of peritoneal dialysis instead of hemodialysis is beneficial in controlling fluid and electrolyte imbalance. 3]The cause of one early postoperative death was not associated to renal failure, rather it was the result of an accidental rupture in the right ventricular wall.

• Journal of Chest Surgery
• /
• 제43권2호
• /
• pp.184-187
• /
• 2010

압축성 심막염은 개심술 후 드문 합병증이지만 여전히 심장 수술 후 이상적인 치료접근이 필요한 어려운 질환이다. 저자들은 심장 수술 후 우심부전증을 보이는 압축성 심막염 2예를 경험하였다. 심장 초음파 검사에서 보이는 심실중격떨림 현상으로 진단하였고, 두 환자에서 각각 개심수술 40일과 31일만에 좌측 전측방 소절개 개흉술로 심막절제술을 시행하였다. 심막절제술 후 1∼2주일에 걸쳐 심부전증은 서서히 호전되었다. 개심술 후 발생한 압축성심막염에 대해 보존적 내과적 치료방법으로 압축성 증상 및 증후가 호전되지 않는 경우 좌측 전측방 소절개 개흉술에 의한 심막절제술은 효과적인 치료 방법의 하나로 생각된다.