Abstract
\Background 4D Flow Cardiac Magnetic Resonance (CMR) is a novel imaging modality to assess bioprosthetic mitral valve (BMV) function. We describe a new, 4D Flow derived velocity time integral (TVI) based method to assess effective orifice area (EOA) for BMVs. Methods In our MRI-compatible circulatory loop 4 stented porcine BMVs (27, 29, 31, 33mm) underwent CMR with a 1.5T Siemens scanner. The valves were evaluated at forward stroke volumes of 70, 90 and 110ml at a beat rate of 70bpm. We plotted instantaneous peak velocities and calculated TVI for each scenario. 4D CMR-EOA was
Highlights
MethodsIn our MRI-compatible circulatory loop 4 stented porcine bioprosthetic mitral valve (BMV) (27, 29, 31, 33mm) underwent Cardiac Magnetic Resonance (CMR) with a 1.5T Siemens scanner
4D Flow derived velocity time integral (TVI) based method to assess effective orifice area (EOA) for BMVs
The valves were evaluated at forward stroke volumes of 70, 90 and 110ml at a beat rate of 70bpm
Summary
MethodsIn our MRI-compatible circulatory loop 4 stented porcine BMVs (27, 29, 31, 33mm) underwent CMR with a 1.5T Siemens scanner. Bioprosthetic mitral valve effective orifice area using 4D flow cardiac magnetic resonance derived time velocity integral. An in vitro comparison with Doppler Echocardiography Dimitrios Maragiannis*, Matthew Jackson, Stephen Igo, Karen Chin, Kyle Autry, Mohamad G Ghosn, Dipan J Shah, Stephen H Little
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