Fig. 1.

2D Speckle-tracking Strain Analysis of the Right Ventricle. Right ventricular longitudinal strain analysis in the designated user interface. Panel A demonstrates how first the endocardial border is delineated in the apical 4-chamber view. Based on this contour, the interventricular septum and the right ventricular free wall are tracked automatically. The user optimizes the tracking quality, by adjusting the aforementioned contour and by altering the region of interest (ROI), which corresponds to the width of the tracking (Panel B). Thereafter, the program calculates global strain (GS) based on a weighted average of three septal and three right ventricular free wall segments (Panel C and D)