• Journal of Chest Surgery
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• 제19권4호
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• pp.644-662
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• 1986

Seventy cases of open heart surgery were performed in the department of Thoracic and Cardiovascular Surgery, Pusan Paik Hospital, Inje College, from Oct. 1985 to Oct. 1986. And the results were summarized as follows. 1. Among the 70 cases, there were 48 cases of congenital heart anomalies and 22 cases of acquired rheumatic valvular heart diseases. Age range of the congenital patients was 7 months to 31 years with the mean age of 10 years, and the acquired patients was 18 to 62 years with the mean age of 40 years. 2. The heart-lung machine used for cardiopulmonary bypass was Sarns 7000, 5-head roller pump, and the number and type of oxygenators were 5 of membrane type and 65 of bubble type. For all cases GIK [glucose-insulin-potassium] solution was used as cardioplegic solution for myocardial protection during operation. 3. Among the 48 congenital anomalies, there were 12 cases of ASD group, 29 of VSD group, 3 of ECD, 3 of TOF and one of PDA + MR, and to all of which the appropriate radical operations were applied. 4. Among the 22 acquired valvular diseases, there were 11 cases of mitral valve diseases [MS; 4, MSr; 3, MRs; 4], 3 cases of aortic valve diseases [AR:1, ARs;1, ASr;1], 4 cases of double valve diseases [MRs+TR; 3, MRs+ARs; 1] and 4 cases of triple valve diseases [MSr+ASr+TR; 3, MSr+Ar+TR; 1]. To all the diseased mitral and aortic valves, artificial valve replacement was applied except one [As], in which valve plication was applied. And to all the diseased tricuspid valve, DeVega annuloplasty was applied. 5. The number of replaced artificial valves were 29 in 25 patients [congenital; 3, acquire; 22]. In MVR, 6 of mechanical valves [St. Jude Medical valve; 6] and 15 of tissue valves [Carpentier-Edward valve; 11, lonescu-Shiley valve; 4] were used. In AVR, 6 of mechanical valves [St. Jude Medical valve; 6] and 2 of tissue valves [Carpentier-Edward valve; 2] were used. 6. Postoperative complications were occurred in 12 cases. Among them 11 cases were recovered with intensive cares, but one patient [VSD + Fistula of Valsalva sinus] was expired with low cardiac out put syndrome.

• Journal of Chest Surgery
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• 제37권7호
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• pp.559-569
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• 2004

CarboMedics 기계판막은 낮은 판막관련 합병증을 보인다고 보고되어 왔다. 이 논문의 목적은 CarboMedics기계판막 치환술 후 장기 임상성적을 분석하고자 하였다. 대상 및 방법: 1988년 8월부터 1999년 9월까지 850명의 환자를 대상으로 1144예의 CarboMedics 판막치환술이 이루어졌다(대동맥판막 치환군 179예, 승모판막 치환군 385예, 이중판막치환군 234예, 삼첨판막 치환군 52예). 환자들의 평균연령은 44.5 $\pm$ 12.5세였고 완전 추적관찰은 95.3%의 환자에서 이루어졌으며, 평균 추적관찰 기간은 7.9년이었다. 결과: 병원 사망률은 3.4%였으며, 환자군에 따라 분류하면 대동백판막군 1.7%, 승모판막군이 2.6%, 이중판막군 4.7%, 그리고 삼첨판막군 9.6%로서 삼첨판막군이 대동맥판막군이나 승모판막군보다 수술사망률이 높았다(p〈0.05). 대동맥판막군, 승모판막군, 이중판막군, 그리고 삼첨판막군의 10년 생존율은 각각 87.1 $\pm$ 2.6%, 88.9 $\pm$ 1.7%, 82.4 $\pm$ 2.9%, 그리고 77.5 $\pm$ 7.0% 였으며, 환자의 연령과 삼첨판막 치환술이 다변량분석에서 장기생존에 영향을 미치는 위험인자였다(p〈0.05). 대동맥판막군, 승모판막군, 이중판막군, 그리고 삼첨판막군의 10년 혈전색전증 회피율은 92.5 $\pm$ 2.3%, 94.2 $\pm$ 1.4%, 94.3 $\pm$ 1.7%, 그리고 97.8 $\pm$ 2.2%였으며, 10년 항응고제 연관 출혈 회피율은 92.5 $\pm$ 2.6%, 93.0 $\pm$ 1.5%, 96.7 $\pm$ 1.3%, 그리고 88.6 $\pm$ 5.5%였으며, 10년 판막혈전증 회피율은 99.4 $\pm$ 0.6%, 98.2 $\pm$ 0.8%, 99.2 $\pm$ 0.8%, 그리고 87.6 $\pm$ 0.5%로서 삼첨판막군이 다른 판막 치환군에 비해 의미 있게 높은 판막혈전증의 발생을 보였다(p 〈0.05). 결론: CarboMedics 기계판막을 이용한 판막치환술의 장기성적에서 만족할 만한 생존율과 낮은 판막관련 합병증을 확인할 수 있었다. 그러나 삼첨판막 치환술은 다른 위치의 판막치환술과 비교하여 높은 수술사망률과 판막혈전증의 빈도를 보였다.

• Journal of Chest Surgery
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• 제25권1호
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• pp.57-65
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• 1992

St.Jude Medical cardiac valve replacement was performed in 322 patients: 191 had mitral, 58 had aortic, 72 had double valve and 3 had tricuspid valve replacement. Motality rate in early period was 2.8%[9 patients]. The most common cause of early death was low cardic output syndrome. Follow up extended from 1 to 90 months[mean: 34 months] in 292 patients among 313 in all surviving patients [93.6%]. There were thrombolic complications in eighteen patients. The probability of free from thromboembolism at 5 yerars in MVR, AVR and DVR were 84.7%, 91.8% and 90.2% respectively. And also, actuarial event free rate at 5 years in MVR, AVR and DVR were 80.1%, 82.2%, and 81.4% respectively. There were fourteen late death during follow up period: six from thromboembolism, one from hemorrhage and the others from non valve related -or unknown complications. The acturial survival rate at 5 years were 93.1% in mitral, 92.1% in aortic and 97.1% in double valve replacement. In conclusion, the performance of the St. Jude Mecanical valve compares most favorably with other artificial valves. But it remains still hazards of mechanical prosthesis such as thromboembolism and anticoagulant related hemorrhage.

• 대한의용생체공학회:의공학회지
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• 제36권5호
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• pp.183-190
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• 2015

Invasive blood pressure (IBP) is measured for the patient's real time arterial pressure (ABP) to monitor the critical abrupt disorders of the cardiovascular system. It can be used for the estimation of cardiac output and the opening and closing time detection of the aortic valve. Although the unexplained inflections on ABP make it difficult to find the mathematical relations with other cardiovascular parameters, the estimations based on ABP for other data have been accepted as useful methods as they had been verified with the statistical results among vast patient data. Previous windkessel models were composed with systemic resistance and vascular compliance and they were successful at explaining the average systolic and diastolic values of ABP simply. Although it is well-known that the blood pressure reflection from peripheral arteries causes complex inflection on ABP, previous models do not contain any elements of the reflections because of the complexity of peripheral arteries' shapes. In this study, to simulate a reflection wave of blood pressure, a new mathematical model was designed with four elements that were the impedance of aorta, the compliance of aortic arch, the peripheral resistance, and the compliance of peripheral arteries. The parameters of the new model were adjusted to have three types of arterial blood pressure waveform that were measured from a patient. It was used to find the relations between the inflections and other cardiovascular parameters such as the opening-closing time of aortic valve and the cardiac output. It showed that the blood pressure reflection can bring wide range errors to the closing time of aortic valve and cardiac output with the conventional estimation based on ABP and that the changes of one-stroke volumes can be easily detected with previous estimation while the changes of heart rate can bring some error caused by unexpected reflections.

• Journal of Chest Surgery
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• 제29권10호
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• pp.1102-1110
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• 1996

1955년 9월 부터 1995년 7월까지 230례의 승모판치환수술이 시행되었다. 이 중 남자는 77명 여자가 153명이 었고 평균 연령은 35.7였다. 동반된 수술은 대동맥 판막치 환술(40례), 삼첨 판윤성 형술(25례), 대동맥판치환술+삼첨판성형술(8례),삼첨판치환술(2례)등이 있었다. 139례의 기계판막과 91개의 조직판막이 치환되었으며, 판막의 크기와 사용된 수는 31 mm(75개), 29mm(66개), 33mm(46개), 27mm(29개) 및 25mm(14개) 등이었다. 수술전 NYHA 기능적 등급은 II(76례), III(123례), IV(31례)였으며 술후 I(175례), II(49례) 등으로 호전되었다. 술후 조기 합병증은 28에서 발생하였으며 저심박출증씨 8례로 가장 많았다. 조기사망은 6례 (2.6%)였으며 사망원인은 저심박출증(2례), 부정맥(2례), 심장파열(2례) 등이 었다. 총 추적 기간 누계는 764.4 환자-년이었으며 평균추적 기간은 43.9개월이었다. 판막과 유관한 장기 합병증은 21례에서 발생하였으며 이중 판막파괴가 10례(1.3%1환자-년), 항응혈제 출혈 5례(0.7%/환자-년), 심내막염 4례(0.5%1환자-년) 혈색전증 2례(0.3%/환자-년) 등이었고 심장에 연유한 사망은 5례(0.7%/환자-년)에서 발생하였다. 9년 장기추적중 합병증 및 사망비발생률이 판막 상호간에 유의한 차가 없었으나 판막파괴비 발생률이 기계 판막(100%)과 조직 판막(34.4%) 사이에 유의한 차가 있었다(p=0.032). 9년간 보험통계적 생존률은 96.6%였다.

• Journal of Chest Surgery
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• 제22권1호
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• pp.42-49
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• 1989

A total of 420 pyrolytic carbon mechanical valves were implanted in 336 patients from January, 1984, through Jung, 1988. Of the valves implanted, 131 were Bjork-Shiley, 250 St-Jude, and 39 Duromedics. The cumulative follow-up was 398 patient-years with a mean follow-up of 14.4 months per patients. Among 336 patients, 175 had mitral, 68 aortic, 82 multiple, 10 tricuspid, and one pulmonary valve replacement. The hospital mortality figures were 9 of 336[2.67%] in all, 5 of 175[2.85%] in isolated mitral, 1 of 68[1.47%] in isolated aortic and 3 of 82[3.65%] in multiple valve replacement. The causes of hospital mortality were myocardial failure in 5, sepsis in 2, bleeding in 1, cerebral embolism in l. There was no late valve related mortality. The actuarial survival rate at 4.5years was 99.4*0.1%. The complications occurred in 15 of 336[4.46%]; 7 of 175[4.0%] in isolated mitral, 4 of 68[5.88%] in isolated aortic, and 4 of 82[4.89%] in multiple valve replacement. The causes of complications were thromboembolism in 4, hemorrhage in 4, paravalvular leakage in 4, hepatitis in 2, and complete AV block in l. Actuarial probability of survival at 4.5 years was 95.0*0.1%. The low mortality and complications encourage us to applicate these valves to any patient including children and young women.

• Journal of Chest Surgery
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• 제46권2호
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• pp.104-110
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• 2013

Background: We reviewed the long-term outcomes of aortic root replacement at Asan Medical Center and investigated the predictors affecting mortality. Materials and Methods: A retrospective analysis was performed on 225 consecutive adult patients undergoing aortic root replacement with mechanical conduits (n=169), porcine aortic root prosthesis (n=23), or aortic homografts (n=33) from January 1992 to September 2009. The median follow-up duration was 6.1 years (range, 0 to 18.0 years). Results: The porcine root group was older than the other groups (freestyle $55.9{\pm}14.3$ years vs. mechanical $46.3{\pm}14.6$ years, homograft $48.1{\pm}14.7$ years; p=0.02). The mechanical group had the highest incidence of the Marfan syndrome (mechanical 22%, freestyle 4%, homograft 3%; p=0.01). Surgery performed for infective endocarditis was more frequent in the homograft group (mechanical 10%, freestyle 10%, homograft 40%; p<0.001). The overall 30-day mortality was 5.3% (12/225). Actuarial survival rates in the mechanical, porcine root, and homograft groups were 79.4%, 81.5%, and 83.5% at 5 years and 67%, 61.9%, and 61.1% at 10 years, respectively (p=0.73). By multivariate analysis, preoperative diabetes mellitus, older age, and longer cardiopulmonary bypass time were independent predictors of mortality. Incidence of postoperative complications, including infective endocarditis and thromboembolism were comparable in all of the groups. Conclusion: Aortic root replacement can be safely performed with different types of prostheses as the outcome was not affected by the choice of prosthesis. Further studies are required to assess the long-term durability of biological prostheses.

• Journal of Chest Surgery
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• 제31권3호
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• pp.242-246
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• 1998

1989년 1월부터 1995년 12월까지 27예에서 심장판막 재치환술을 시행하였다. 남자 11예, 여자 16예로 평균연령은 43.51+12.2세 이었다. 기왕의 판막치환은 12예가 조직판막이었고 15예가 기계판막이었다. 인공심장판막이 재치환수술까지 체내에 있었던 기간은 조직판막이 104.91+34.9개월, 기계판막이 55.21+43.7개월이었다. 재치환된 판막은 승모판막 17예, 대동맥판 8예, 삼첨판 1예 그리고 1예는 Cabrol수술을 다시 시행한 경우이다. 재치환의 원인은 조직판막에서 판막의 구조적 결함이 전 예에서 관찰되었으며 그 외에 판막주위누출 2예와 심내막염 1예가 이었다. 기계판막에서는 판막주위조직의 침윤이 8예, 판막주위누출 4예, 판막혈전 3예가 있었으며 판막주위누출 4예중 1예는 Cabrol수술후 인조혈관의 파열이 동반되었다. 술후 합병증(25.9%)으론 창상감염 3예, 미추부 피부괴저 1예, 저심박출증 1예, 심방조동 1예 그리고 방실차단 1예 이었다. 술후 조기사망은 1명이 저심박출증으로 사망하였고 평균 49.5개월간의 추적관찰중 1명이 확장성 심근증으로 수술 3년후에 사망하였다.

• Journal of Chest Surgery
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• 제21권1호
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• pp.62-69
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• 1988

In the department of chest surgery of WonKwang university hospital, mechanical valve replacement was performed in 51 cases from June 1985 to September 1987. Among these, 32 cases were mitral valve replacement, 4 cases were aortic valve replacement, and 15 cases were double valve replacement. 26 cases were male and 25 cases were female and age distribution ranged from 16 years old to 63 years old. Early death within 30 days after operation was 2 cases [3.9%] and causes of death were right heart failure [1] and right ventricular wall rupture [1]. Among 49 early survivors, 2 cases of late death were developed and the causes of death were cardiomyopathy [1] and ventricular arrhythmia [1] Anticoagulant therapy was done with warfarin sodium to the level of 1.5-2 times of normal prothrombin time [20-40%] in 47 survivors. Symptomatically, 93.6% of preoperative NYHA functional class III or IV were converted to the NYHA functional class I or II during follow up.

• Journal of Chest Surgery
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• 제28권9호
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• pp.817-821
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• 1995

The CarboMedics Medical valve has become our mechanical valvular prosthesis of choice because of favorable hemodynamic results that associated with marked clinical improvement and low incidence of thromboembolism after it,s uses. The data for this study was collected from August 1988 to July 1993,five years period. There were total of 57 patients[female 40,male 17 in this series with 4 isolated aortic valve,26 isolated mitral valve,11 double valve and a triple valve replacement. The mean follow up time was 32 months. Postoperatively,58% of cases were in New York Heart Association[NYHA functional class I,and mild and moderate symptoms[NYHA class II were present in 36% and there were very few patients remaining in higher functional classes. In postoperative echocardiographic study, showed marked improved cardiac function. The overall early mortality was 3.5% and the late mortality was one case after triple valve replacement due to sudden death. The causes of early death were attributed to early prosthetic valve endocarditis and heart failure.