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T D T Tjan

Publications and source records attributed to T D T Tjan.

16 recordsLinked to original sources
PubMed2006

Aminoterminal B-type pro-natriuretic peptide as a marker of recovery after high-risk coronary artery bypass grafting in patients with ischemic heart disease and severe impaired left ventricular function.

BACKGROUND: Aminoterminal B-type pro-natriuretic peptide (NT-proBNP) is a reliable indicator of heart failure severity. Levels of NT-proBNP are markedly increased in patients with coronary artery disease (CAD) and severely impaired left ventricular (LV) function. The aim of our study was to assess the impact of NT-proBNP levels after high-risk coronary artery bypass grafting (CABG) with regard to recovery potential. METHODS: Between 1998 and 2004, 121 patients with CAD and severely impaired LV function, who were undergoing CABG, were investigated. Their mean age was 64 +/- 11 years. All patients were in New York Heart Association (NYHA) Class III/IV status; LV ejection fraction (EF) was 20 +/- 6%. All survivors underwent follow-up (59 +/- 34 months) spiroergometric, electrocardiographic (ECG) and echocardiographic assessment and were tested for routine blood controls and NT-proBNP levels (Roche, Mannheim, Germany). RESULTS: The survival rate after 8 years was 70%. All survivors received follow-up assessment. Among survivors the median NT-proBNP level at follow-up was 896 (521 to 1,687) pg/ml. The maximum oxygen uptake was 14.6 +/- 4.9 ml/min/kg, and EF increased to 42% at follow-up among all survivors. On dichotomizing survivors into two groups with NT-proBNP levels above and below the median, the post-operative body mass index was significantly higher in the high NT-proBNP group (p = 0.036). EF (p = 0.028) and NYHA classification (p < 0.05) improved significantly in both groups, with a tendency toward higher EF in the low NT-proBNP group. CONCLUSIONS: Patients undergoing a high-risk CABG procedure have a survival rate comparable to heart transplantation patients and show a potential for clinical and myocardial recovery. NT-proBNP use a useful marker for recovery after a high-risk CABG procedure, with significant correlation with clinical parameters.

Aged↗
PubMed2006

Heart transplantation after Fontan's procedure with bilateral cavopulmonary connections.

We present a young female patient with three caval drainages after complete Fontan's procedure and with bilateral bidirectional cavopulmonary connections who underwent orthotopic heart transplantation. Instead of reconstructing the hypoplastic innominate vein the persistent left superior caval vein was reanastomosed via the recipient's coronary sinus into the right atrium.

Adult↗
PubMed2006

Apicoaortic conduit--a technical modification.

We report on a technical modification in the creation of an apicoaortic conduit which was successfully performed in a 49-year-old patient with porcelain aorta and previous off-pump coronary revascularization.

Anastomosis, Surgical↗
PubMed2005

Neoplastic heart disease -- the Muenster experience with 108 patients.

BACKGROUND: Tumours of the heart are rare. Different histological subtypes are known. The most common tumour entity is benign cardiac myxoma. Malignant heart tumours are less common. Tumours originating in other organs such as the kidney may also affect the heart by tumour progression via the inferior caval vein. A large experience with surgical treatment of different types of heart tumours is presented. METHODS: Between January 1989 and April 2004, 108 patients with a heart tumour were included in a database. All patients underwent radical surgical resection, except for 2 patients who had malignant lymphoma of the heart. RESULTS: Histological findings included 78 myxomas (72.2 %), and 6 other benign cardiac tumours in 5.6 % of the patients. Primary malignant heart tumours were seen in 10 (9.2 %) and renal cell carcinoma with cardiac involvement in 6 (5.6 %) patients. Eight patients presented with tumour metastases inside the heart (7.4 %). Mean overall survival was 12.7 years for myxoma patients and 5.6 years for patients with other benign heart tumours. Patients with primary malignant heart tumours survived 5.5 years on average. CONCLUSIONS: Heart tumours are rare, but usually life-threatening. Radical surgical resection is the therapy of choice and may offer excellent long-term survival, even in cases with malignant heart tumours.

Adolescent↗
PubMed2005

Heart failure in children -- mechanical assistance.

The use of mechanical circulatory support for the treatment of heart failure in the pediatric population has become increasingly important in pediatric heart surgery units; however, the treatment options for the pediatric population have not attained the same level of technological development as we have seen for the adult population. The use of mechanical assistance as a bridge to transplantation or a bridge to recovery are the main indications for mechanical circulatory support in infants and children. The problem of organ donor shortage is even worse compared to the situation in the field of adult heart transplantations. Especially in Europe however, newly developed pulsatile, paracorporeal ventricular assist devices designed for long-term assist in children have demonstrated their ability to provide excellent results beyond the abilities of extracorporeal membrane oxygenation and centrifugal pumps, which are still the mainstay of mechanical support in children worldwide. Especially in the group of the smallest patients, the use of the most appropriate form of circulatory assistance has to be carefully considered as the co-incidence of respiratory failure as well as other complex physiological situations will severely influence the outcome.

Cardiac Surgical Procedures↗
PubMed2005

Techniques of pediatric heart transplantation.

Pediatric heart transplantation is different to heart engraftment in adults. Surgical techniques for donor harvesting and transplantation related to the various underlying heart diseases are presented.

Child↗
PubMed2005

Cardiac transplantation in neonatal Marfan syndrome -- a life-saving approach.

Marfan syndrome is a connective tissue disease with typical clinical signs and cardiac involvement. Its appearance in the neonatal period has a bad prognosis due to incompetence of all cardiac valves with subsequent congestive heart failure. Conservative management usually fails, the children die during their first year of life. We report on a girl with neonatal Marfan syndrome who suffered from regurgitance of all cardiac valves, enlarged ventricles, and dilated great arteries. She was NYHA class IV. At the age of six months she underwent heart transplantation. To prevent aneurysm formation and dissection of the great vessels, the whole aortic arch and pulmonary trunk were replaced as well.

Female↗
PubMed2005

Cardiothoracic surgery after heart and heart-lung transplantation.

OBJECTIVE: We sought to examine our management and the outcomes of cardiothoracic procedures after heart and heart lung transplantation. METHODS: We performed a retrospective review of cardiothoracic surgical procedures carried out between 1990 and 2004 in patients who had previously undergone heart or heart-lung transplantation at our institution. RESULTS: Twenty-one out of 340 patients (6.2 %) were identified. Cardiothoracic surgery was performed 44.4 +/- 33 months (range 1 - 115 months) after transplantation. Predominant types of surgery were coronary artery bypass grafting due to allograft vasculopathy (n = 5), aortic surgery due to acute dissection (n = 3), biventricular assist device implantation due to acute rejection (n = 1), tricuspid valve repair (n = 1), multiple cardiac surgical procedures including coronary artery bypass grafting, retransplantation, and tricuspid valve replacement (n = 2), explantation of a functionless heterotopic transplanted heart (n = 1). Lung surgery was performed in six patients due to pneumonia (n = 2), primary lung carcinoma (n = 3), lung torsion following heart-lung transplantation (n = 1). All patients underwent either lobectomy or segmental lung resection. Single lung retransplantation (n = 2) after prior heart-lung transplantation due to bronchiolitis obliterans was performed. In one patient a pneumonectomy (n = 1) due to severe chronic rejection of the contralateral lung was performed. Six subsequent deaths after cardiothoracic procedures were recorded after 1, 4, 78, 163, 205, and 730 days, respectively. Causes of death were advanced carcinoma (n = 1), multi-organ failure due to sepsis (n = 2), sudden heart death (n = 2), and advanced heart failure (n = 1). Fifteen out of 21 patients having undergone cardiothoracic procedures (71.4 %) survived the observation period of 56.6 +/- 34 months (range 1 - 114). CONCLUSIONS: Reasons for cardiothoracic procedures after prior heart or heart-lung transplantation were allograft vasculopathy, aortic dissections years after transplantation, chronic rejection, and either lung infections or malignancies. Surgical repair can be performed with an acceptable operative risk and good long-term survival rates.

Cardiac Surgical Procedures↗
PubMed2005

Psychological care of heart-transplanted children and their families.

Heart transplantation is not a unique event, neither from the medical point of view nor from the standpoint of psychosocial care. It is a process which begins during the evaluation for transplantation and continues up to re-integration of the patient into everyday life. It is obvious that during the entire time both the child suffering from heart disease and the family of the affected child have to deal with heavy emotional stresses and adjustments. For this reason transplantation centers are obliged by law to provide psychological care.

Adaptation, Psychological↗
PubMed2004

Radical resection of cardiac sarcoma.

We report on our experience with six patients with malignant sarcoma of the heart and show that long-term survival is possible after radical resection. At presentation, the 6 patients (3 male, 3 female) were 45.8 +/- 20 years old. Three patients are alive without evidence of metastases since 29.6 +/- 36.8 months, three patients died after 38 +/- 50.2 months due to distant metastases. Precise preoperative localization of the tumor by means of imaging techniques is very important. In some cases, radical surgery requires an ex situ procedure (autotransplantation). If necessary, the right heart can be resected almost completely, and reconstructed in the form of a Fontan-type circulation. A heart transplantation, as suggested by others, is not justified from our point of view, since prognosis is not better and donor organs are too rare. The results of radical resection are promising, but new concepts for treatment--in particular chemotherapy concepts--for these mostly middle-aged or young patients are required.

Adolescent↗
PubMed2004

Successful long-term bridge to transplant in a 5-year-old boy with the EXCOR left ventricular assist device.

We report on a 5-year-old boy who presented with postcardiotomy failure after aortic valve replacement and had to undergo implantation of a Berlin Heart-Excor system since treatment with ECMO did not improve myocardial pump function. After a stormy postoperative course with delayed sternal closure after 9 days, the young boy finally recovered and could be fully mobilized. Until successful heart transplantation after a support interval of 77 days, he experienced no device-related infectious or thromboembolic complications.

Aortic Valve Insufficiency↗
PubMed2003

Ex situ resection of primary cardiac tumors.

The prognosis of malignant heart tumors is pessimistic; 50% of patients die within 6 months. No optimal therapy has been established, and standardized therapeutic concepts have not been developed due to the low incidence of this disease. In most cases, chemotherapy and radiotherapy have not shown any survival benefit compared to surgical treatment. Obviously, radical resection of the tumor is the most important determinant for long-term survival. Here, we report on two patients in whom radical resection of heart tumors could be accomplished only after explantation of the heart.

Adult↗
PubMed2002

Myocardial ischaemia in patients with impaired left ventricular function undergoing coronary artery bypass grafting--milrinone versus nifedipin.

BACKGROUND AND OBJECTIVE: Myocardial ischaemia and infarction are major complications immediately after coronary artery bypass grafting. They may be due to incomplete surgical revascularization, perioperative anaesthetic management or vasospasm of arterial grafts, e.g. the internal mammary artery. Infusions of nifedipine or milrinone have been advocated to prevent spasm of the mammary artery. The study compared the incidence of myocardial ischaemia after continuous infusion of either nifedipine (0.2 microg kg(-1) min(-1)) or milrinone (0.375 microg kg(-1) min(-1)) in patients with compromised left ventricular function scheduled for elective coronary artery bypass graft. METHODS: After Institutional Review Board approval, this double-blinded randomized clinical study enrolled 30 adult patients with compromised left ventricular function (ejection fraction < 0.4) scheduled for elective coronary artery bypass grafting after written informed consent had been obtained. Ischaemia was detected by Holter electrocardiographic monitoring. The incidence of myocardial cell death was monitored by serial determinations of the creatine kinase-MB (CK-MB) and troponin-I. RESULTS: New ST elevation > or = 0.2 mV or new ST depression < or = 0.1 mV occurred in five of 15 patients in the milrinone group (33.3%) and in 13 of 15 patients (86.6%) in the nifedipine group (P < 0.05). There were increases in CK-MB and troponin-I in both groups. Twenty-four hours postoperatively, CK-MB (P = 0.003) and troponin-I (P = 0.001) were significantly higher in the nifedipine group. CONCLUSIONS: Perioperative continuous infusion of milrinone, compared with nifedipine, results in a significantly lower incidence of myocardial ischaemia and myocardial cell damage after elective coronary artery bypass grafting.

Aged↗
PubMedDate not supplied

A decade of staged Norwood palliation in hypoplastic left heart syndrome in a midsized cardiosurgical center.

Hypoplastic left heart syndrome (HLHS) is a challenge for the pediatric cardiologist and the surgeon. It is generally assumed that the postoperative outcome after surgery for congenital heart disease is influenced by the institutional size. We present the results of 43 patients with true HLHS (situs solitus and atrioventricular and ventriculoarterial concordance) referred for operation between 1992 and 2002 in our center. Two children had atrioseptostomy: one died soon after the operation, and the other one was transplanted successfully but died at the age of 6 months following acute rejection. The remaining 41 underwent Norwood I palliation, 21 stage II palliation, and 10 stage III palliation. Early mortality was 29% after stage I operation, 4.7% after stage II palliation, and 0% after stage III operation. Overall mortality was 39% after stage I, 9.5% after stage II, and 10% after stage III operation. Low birth weight was associated with a higher mortality (p < 0.05). Mortality declined with increasing experience, comparable to the results of very large cardiosurgical centers with many more patients. The quality of surgery and perioperative management in smaller pediatric cardiosurgical centers can reach the level of very large centers.

Germany↗