1. Velocity-encoded imaging (phase contrast mapping) to assess trans- and paravalvular regurgitation after transcatheter aortic valve replacement (TAVR). Multiple levels of acquisition are taken perpendicular to aortic flow for the Edwards Sapien XT (A) and Corevalve (B) prostheses. The aortic outflow tract cross section is planimetered on both magnitude (C), for localization and phase (D), for velocity information) images, throughout the cardiac cycle and a curve of forward and regurgitant flow is graphed (E). The regurgitant fraction (RF) is calculated as the regurgitant volume (RV) divided by the stroke volume (SV) × 100. (Reproduced with permission from Salaun E, Jacquier A, Theron A, et al. Value of CMR in quantification of paravalvular aortic regurgitation after TAVI. Eur Heart J Cardiovasc Imaging. 2016;17(1):41–50.)
Source: Cardiovascular Magnetic Resonance, Nuclear Cardiology: Practical Applications, 3e
Citation: Heller GV, Hendel RC. Nuclear Cardiology: Practical Applications, 3e; 2017 Available at: Accessed: October 15, 2017
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