Mitral Valve Reconstruction in Mitral Insufficiency: Intermediate-Term Results / 대한흉부외과학회지

BACKGROUND: The advantages of mitral valve reconstruction have been well established and so mitral valve reconstruction is now considered as the procedure of choice to correct mitral vlave disease. This is the report of intermediate-term results of 38 cases that performed mitral valve reconstruction for valve insufficiency(the total number of mitral valve reconstruction were 49 cases, but 11 cases that performed mitral valve replacement due to incomplete reconstruction were excluded). MATERIAL AND METHOD: From March 1991 to March 2001, 38 patients underwent mitral vlave repair due to mitral valve regurgitation with or without stenosis. Mean age was 47.6+/-14.7 years(range 15 to 70 years) : 11 were men and 27 were women. The causes of mitral valve regurgitation were degenerative in 14, rheumatic in 21, infective in 2 and the other was congenital. RESULT: According to the Carpentier's pathologic classification of mitral valve regurgitation, 3 were type I, 16 were type II and 19 were type III. Surgical procedures were annuloplasty 15, commissurotomy 19, leaflet resection and annular plication 9, chordae shortening 11, chordae transfer 5, new chordae formation 2, papillary muscle splitting 2 and vegetectomy 2. These procedures were combined in most patients. There were 2 early death and the causes of death were respiratory failure, renal failure and sepsis. There was no late death. Valve replacement was done in 6 patients after repair due to valve insufficiency or stenosis 3 weeks, 1,3,51,69,84months later respectively. These patients have been followed up from 1 to 116 months(mean 43.0 months). The mean functional class(NYHA) was 2.36 pre-operatively and improved to 1.70. CONCLUSION: In most cases of mitral valve regurgitation, mitral valve reconstruction when technically feasible is effective operation that can achieve stable functional results and low surgical and late mortality.

Clinical Study of Prosthetic Heart Valve Replacement with CarboMedics / 대한흉부외과학회지

BACKGROUND: The CarboMedics prosthetic heart valve was produced in an attempt to improve the existing valve designs and was especially concerned with easily the implantation and further reduction of turbulence. Precise positioning of the valve in situ was achieved by the abilityof the valve to rotate relative to the sewing ring. Improved monitoring is possible due to increased radiopacity and the dacron sewing ring is coated with carbon to reduce pannus overgrowth. The leaflets have an opening angle of 78 degrees that apparently allows a rapid synchronous closure The aim of this study was to analyze the clinical performance of the CarboMedics valve prostheses(45 mitral 13 aortic and 7 double aortic-mitral valve replacement) were implanted in 65 patients(mean age 48.75+/-9.74 years) RESULT: The operative mortality was 3.1%(2/65) causes of death were low cardiac output syndrome. Total follow up was 1831 patient-months and mean follow up was 29.06+/-10.97 months/patient. No structural failure hemorrhage valve thrombosis and late death have been observed. Embolism occurred at a rate of 0.65%/Patient-year. Actuarial survival and thrombombolism free rate at 36 months were 96.9% and 98.4% respectively. CONCLUSIONS: The CarboMedics valve stands for low valve related complicatons.

Diagnostic Thoracoscopy in the Pleural Effusion / 대한흉부외과학회지

BACKGROUND: A pleural effusion is not a disease entity but a clincial sign of systemic or pleural disease. Although the diagnosis of pleural effusion can often be done by toracentesis and pleural needle biopsy the yeild of positive diagnosis is low.

Postoperative Evaluation for Ventricular Septal Defect Associated with Aortic Valvular Prolapse / 대한흉부외과학회지

BACKGROUND: From January 1989 to December 1996, we analyzed 22 cases of ventricular septal defect associated(VSD) with aortic valvular prolapse. MATERIAL AND METHOD: The mean age of the patients was 7 years with a range of 6 months to 22 years . Thirteen patients were male and 9 were female. The types of VSD were Kirklin type I in 13 , Kirklin type II in 8 and Kirklin type I+II in one. RESULT: The preoperative echocardiographic findings were aortic valvular prolapse in 10 patients, aortic valvular prolapse associated with aortic regurgitation in 6, and only aortic regurgitation in 2. Aortic valvular prolapse were found in operation field in 4 that was not be in preoperative echcardiography. Preoperative mean Qp/Qs, systolic PAP, systolic RVP were 1.48+/-0.42, 27.9+/-9.87, 32.9+/-10.87 mmHg, respectively. Twenty patients underwent patch closure of VSD, and two patients with moderate aortic regurgitation and prolapsed of the aortic valve underwent patch closure of VSD and aortic valvuloplasty. Short and long term echocardiographic follow-up in 8 patients who had preoperative aortic regurgitation were found to have improved or not aggravated by performing VSD patch closure only and patch closure with valvuloplasty in 2. Twelve patients who had only preoperative aortic valvular prolapse had no change in prolapsed valve in postoperative echocardiography. CONCLUSION: Early closure of VSD with patch is necessary in VSD with aortic valvular prolapse even in associated with mild regurgitation. But in moderate regurgitation, VSD closure with valvuloplasty is recommended.

The Effect of Chordae Preservation in Mitral Valve Replacement / 대한흉부외과학회지

BACKGROUND: Mitral valve replacement(MVR) with chordal preservation in patients with mitral vlavular disease has been proven to be beneficial for left ventricular function and for reduction of postoperative complication. MATERIAL AND METHOD: From January 1995 to July 1996, the early postoperative results of mitral valve replacement were compared between 20 patients who underwent chordae resection(classic MVR group) and 10 patients who underwent chordae preservation(preservation MVR group) in the Department of Thoracic and Cardiovascular Surgery, Chunbuk National University Hospital. RESULT: There was no significant difference between the two groups in age, sex, NYHA functional class, cardiothoracic ratio, echocardiographic finding, cardiopulmonary bypass time and aortic cross clamping time. The difference between preoperative and postoperative cardiothoracic ratio after 3 months was not statistically significant. At echocardiographic left ventricular evaluation, ejection fraction and fractional shortening decreased slightly in the preservation group then preoperative value (p=0.47, p=0.12), however, decreased significantly in the classic MVR group(p=0.03, p=0.04), and were statistically significant between the two groups(p=0.03, p=0.02). CONCLUSION: We conclude that MVR with chorda preservation seems to have a beneficial effect on postoperative left ventricular performance in mitral valve disease than the classic MVR.

Sarcomatoid Carcinoma of the Lung: Two cases report / 대한흉부외과학회지

The pulmonary sarcomatoid carcinoma is a rare malignant tumor, which is composed of an admixture of carcinomatous and sarcomatous components, and accounts for 0.3% of all pulmonary neoplasms. Clinicopathological features are often related to anatomical location: central endobronchial type and peripheral parenchymal type. Noninvasive diagnostic test had a low yield in detection sarcomatoid carcinoma. Metastasis to the regional lymph nodes and to distant organ is common. The prognosis is poor and the median survival is about 15 months. We report two cases of pulmonary sarcomatoid carcinoma with review of literatures.

The Risk Factors of Morbidity and Mortality after Pulmonary Resection / 대한흉부외과학회지

BACKGROUND: Surgical resection offers the potential care in patients with carcinoma of the lung whose tumors are amenable to resection, those with infections destroyed lung discase or congenital lung disease prediction of risk factors to influencing outcome after thoracic operations offers important benefits. Physicians anticipating those patients most prone to complications can provide special attention aimed at reducing morbidity and mortality. MATERIAL AND METHOD: We have retrospectively reviewed hospital records of 153 patients undergoing pulmonary resection for neoplastic and inflammatory destroyed lung disease between 1994 and 1998 to identify predictors of outcome. The mean age was 54.3+/-10.6years. Ninety-six patients(62%) had malignant lung disease and 47 patients(30%) had destroyed lung desease and 10(7%) had congenital or other lung desease. RESULT: Of the 153 resections performed 118 were lobectomies, 29 were pneumonectomies, 6 were segmentectomies, Seven of the 153 patients died during their hospital stay(4.5%). The most significant predietors of in-hospital mortality were presence of concomittent medical disease (P<0.001) and patients age 70 years or over(P<0.003). There were 67 postoperative complication occurring in 57 patients. Operation related complications were in 50 patients (32%), respiration related were in 14(9.1%) and cardiovascular related were in 1(0.6%) and other complications were in 2 patients(1.3%). The most significant predictors of postoperative morbidity was patients age 70 years or over(P<0.004). CONCLUSION: concomitant medical disease and patients age 70 years or over were very predictive value of postoperative mortality, also the patients age 70 years or over was significant preoperative value of postoperative morbidity.

Central Venous Catheter Induced Thrombotic Obstruction of the Superior Vena Cava / 대한흉부외과학회지

Central venous catheterization through subclavian vein has been used for central venous pressure monitoring, hyperalimentation, and fluid therapy. Its complications are air embolism, infection, vascular injury, pneumothorax, hemothorax and thrombosis that is the most serious complication. At the department of Thoracic and Cardiovascular surgery Chonbuk University Hospital, authors experienced superior vena cava syndrome due to thrombosis of the superior vena cava, internal jugular (left), subclavian(left), and innominate vein. Patients was a 21 years old female who had central venous catheterization through subclavian vein for hyperalimentation and fluid therapy because of enterocutaneous fistula. Thrombectomy on superior vena cava was performed, and pre and postoperative anticoagulation therapy was given. Symptoms were relieved after operation. From the venography, performed 6 weeks after the operation, restenosis was seen at the thrombectomy site of the superior vena cava. S anticoagulant and conservative treatment were done that symptoms relieved by the development of collateral venous channel.