Abstract
Background 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.
Highlights
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, 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
Analysis focused on the presence of vertical flow patterns; pulmonary flow eccentricity and wall shear rate (WSR) assessment
Patients with percutaneous implantation showed an eccentric pulmonary flow with vortex formation, and a significant asymmetric elevated WSR at focal regions of the conduit. (Figure 1) Vortex size was positively correlated with the pressure gradient across the valve and with the flow deviation angle
Summary
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. Soha Romeih1*, Rob J van der Geest, Arno Roest, Anje M Spijkerboer, Barbara J Mulder, Nico A Blom, Maarten Groenink. From 17th Annual SCMR Scientific Sessions New Orleans, LA, USA. From 17th Annual SCMR Scientific Sessions New Orleans, LA, USA. 16-19 January 2014
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