Click on image to view larger version.

Figure 1 (a) The velocity-encoded cardiovascular magnetic resonance (CMR) image plane was positioned 1.5 cm from the mitral valve plane toward the apex. (b) A region of interest (ROI) in the velocity image includes the mitral flow jet allowing identification of the peak velocity. (c) Plot of the peak velocity versus time over the cardiac cycle measured by velocity-encoded CMR: note absence of the peak A-wave (Afib). LA = left atrium; LV = left ventricle.