Figure 4:

Four-dimensional flow MRI data were used to calculate left ventricular (LV) blood flow vorticity throughout the cardiac cycle for 20 healthy men and 19 healthy women. Cardiac function data from two-dimensional short-axis MR images were used, in conjunction with volunteer body surface areas (BSAs), to create a vorticity index parameter. *Indexed data were reported on 35 of the 39 volunteers: BSA was not recorded for four participants. Lines in box plots represent median values. SV = stroke volume.