Figure 2.

The cardiac loop. Four‐dimensional magnetic resonance imaging in a normal volunteer showing early diastolic flow (top), late diastolic vortical flow (middle), and early systolic flow (bottom). Mitral valve leaflets are shown in red. Note how the flow turns around the tip of the anterior mitral leaflet. Because of the intimate relation of the inflow and outflow portions of the left ventricle, this U‐turn arrangement is prone to failure. Courtesy of Drs Teodora Chitboi and Leon Axel, NYU Langone Health.