Figure 2

AVJ displacement-versus-time plot and images. Atrioventricular junction motion tracking software interactively measures the longitudinal AVJ position at multiple time points during the cardiac cycle. Error bars represent one standard deviation above and below the mean of multiple independent measurements made on a representative healthy volunteer. Lateral AVJ position, marked with a red asterisk, shown at the start of systole (A), end systole (B), diastasis (C) and end diastole (D) for a representative 4-chamber cine image set. AVJ = atrioventricular junction.