Fig. 3.

Biplane method. Manual delineation requires manual drawing of the endocardial contours in (1) end-diastolic, (2) end-systolic and (3) pre-atrial kick phase, separately for 2 (a) and 4 (b) chamber projections. Corresponding contours using Multimodality Tissue Tracking software are shown at end-diastole (c) and endsystole (d). The contours were drawn at left-ventricular end-systole (the point of largest LA enlargement) and were propagated by the software throughout the cardiac cycle