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Ann Thorac Surg 2004;77:2151-2156
© 2004 The Society of Thoracic Surgeons

Original article: cardiovascular

Right ventricular outflow tract reconstruction with the Contegra bovine jugular vein conduit: a word of caution

Andreas R. Tiete, MDa*, Jörg S. Sachweh, MDa, Ulrich Roemer, MDb, Rainer Kozlik-Feldmann, MDb, Bruno Reichart, MDa, Sabine H. Daebritz, MDa

a Department of Cardiac Surgery, University Hospital Großhadern, Munich, Germany
b Department of Pediatric Cardiology, University Hospital Großhadern, Munich, Germany

Accepted for publication December 10, 2003.

* Address reprint requests to Dr Tiete, Department of Cardiac Surgery, University Hospital Großhadern, Marchioninistr. 15, 81377 Munich, Germany
e-mail: atiete{at}med.uni-muenchen.de

BACKGROUND: Since introduction in 1999, pulmonary valve replacement in pediatric patients with the Contegra conduit (Medtronic Inc, Minneapolis, MN) has gained widespread application with increasing enthusiasm. However, unexpected graft related adverse effects may occur.

METHODS: Between April 2001 and December 2002, 29 patients (20 male; mean age, 3.39 ± 3.66 years; range, 0.01 to 13.0 years; mean weight, 11.62 ± 8.73 kg) underwent right ventricular outflow tract reconstruction with the Contegra conduit. Seventeen patients underwent primary repair, 8 had prior homografts, and 4 had other previous operations.

RESULTS: There were no deaths. Three early graft related complications were observed. In two infants (age, 1.8 and 3.5 months; weight, 3.6 and 3.8 kg, respectively) thrombus formation at the conduit valve was detected 2 weeks postoperatively. Under anticoagulation with low-molecular-weight heparin, thrombi resolved completely in both patients. One patient (4.5 months, 4.43 kg) developed severe regurgitation due to a fibrous layer covering the inner conduit wall and required conduit exchange 3 weeks postoperatively. After a mean follow-up time of 10.2 ± 6.4 months all patients are in good clinical condition. However, one patient with systemic right ventricular pressure developed pseudoaneurysm at both graft insertion sites and is scheduled for reoperation. Two other patients underwent balloon dilation. Freedom from reoperation and intervention at 1 year is 89.4%. With regard to regurgitation and conduit stenosis all other conduits perform well.

CONCLUSIONS: Contegra conduits are an alternative to homografts for right ventricular outflow tract reconstruction. However, there is a risk of thrombus formation in small infants so that prophylactic anticoagulation may be necessary. Patients with systemic right ventricular pressure require close observation as pseudoaneurysm formation has been observed.




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