Fig 7.

Left ventricular (LV) myocardial wall motion and endocardial blurring (EB) for each trigger method. Mid-ventricular short-axis images in end diastole for each trigger method [left column of (a–c)] and corresponding projection of LV myocardial wall motion over the cardiac cycle (time-motion equivalent) with detected endocardial blurring (EB) (d) at the endocardial border (yellow). The images and EB were resampled using the delay of the trigger with respect to the electrocardiogram. Average EB for each trigger method over the cardiac cycle is shown in the bottom row. EB is sensitive to cardiac phases (1. = systole, 2. = diastole), revealing a peak during early diastole (phases 16–19) and flattened plateau-like shape during later diastole. ECG, electrocardiogram; DUS, Doppler ultrasound; POX, pulse oximetry.