Differences in pulmonary flow patterns between surgical and percutaneous implanted bovine valves to restore the right ventricle outflow tract continuity: a four dimensional flow magnetic resonance study
© Romeih et al.; licensee BioMed Central Ltd. 2014
Published: 16 January 2014
In patients with congenital heart defects, restoration of the right ventricle outflow tract (RVOT) continuity by surgical or percutaneous bovine valve implantation is a common procedure. Flow characteristics in such valves are complex, therefore the aim of this study was demonstrating the potential application of 4D MRI flow for the comprehensive assessment of pulmonary flow patterns after surgical and percutaneous bovine valve implantation in the RVOT.
Fifteen patients after percutaneous bovine valve implantation (17.2 ± 2.0 years), 15 patients after surgical implantation (15.8 ± 1.7 years), and 15 healthy volunteers (as a control group) (16.5 ± 1.5 years) were included. All subjects underwent a comprehensive cardiac MRI protocol. Analysis focused on the presence of vertical flow patterns; pulmonary flow eccentricity and wall shear rate (WSR) assessment.
Pulmonary flow patterns differ significantly between patients with a surgical and percutaneously implanted bovine valve in the RVOT. Longer follow up studies will be required to determine the implications of such knowledge for prognosis and therapy.
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