- Meeting abstract
- Open Access
1056 Feasibility and ultility of cardiac MRI in patients with valved bovine jugular vein conduits for right ventricular outflow tract reconstruction
© Ramrakhiani et al; licensee BioMed Central Ltd. 2008
- Published: 22 October 2008
- Cardiac Magnetic Resonance
- Ventricular Outflow Tract
- Right Ventricular Outflow Tract
- Pulmonary Atresia
- Pulmonic Regurgitation
Pulmonary homografts have been the most widely used valved conduits for right ventricular outflow tract (RVOT) reconstruction in the US since mid 1980s. In 1999 a conduit containing a bovine jugular vein (Contegra®, Medtronic, Inc, Minneapolis, MN) was introduced as a potential alternative for RVOT reconstruction. In 2003, the bovine jugular vein conduit was released by the FDA for humanitarian device exemption (HDE) utilization in centers that obtain institutional review board approval and have appropriate informed patient consent. Main advantages of the Contegra® conduit include availability in sizes from 12–22 mm, natural continuity between the valve and the conduit that allows proximal infundibular shaping without additional materials, lower price compared to about half of the pulmonary homografts in the US, and reduced potential risk of supravalvular stenosis due to narrowing at the distal suture line. This data has been reported based on echocardiographic findings of the Contegra® conduit postoperatively. We report on the use of cardiac magnetic resonance (CMR) in patients postoperatively and compare the findings with echocardiography.
We retrospectively analyzed the results of CMR performed pre- and postoperatively in 5 patients with the Contegra® conduit. CMR was performed using a 1.5 Tesla Siemens Avanto system (Siemens Medical solutions, Malvern, PA). Standard images for anatomical and functional evaluation, including volume and flow analysis were reviewed. Descriptive statistical analysis was performed.
The Contegra® conduit is safe to image with CMR, even as early as a year postoperatively, CMR provides excellent images and reliable data regarding the functionality of the conduit with relative ease when compared to echocardiography. This is a promising alternative for following patients with RVOT reconstruction to assess the Contegra® conduit and neo-pulmonic valve, degree of pulmonary regurgitation or stenosis, and right ventricular function.
This article is published under license to BioMed Central Ltd.