Skip to main content
Fig. 2 | BMC Cardiovascular Disorders

Fig. 2

From: Impact of different degrees of left ventricular strain on left atrial mechanics in heart failure with preserved ejection fraction

Fig. 2

Left ventricular and atrial contours demonstrated in long axis images from cardiac magnetic resonance feature tracking (CMR-FT). Left ventricular (LV) endocardial (red line) and epicardial (green line) borders were semi-automatically drawn in 2-, 3-, and 4-chamber cine images (AC) at the end-diastolic phase, while left atrial (LA) strain contours were manually drawn in 2- and 4-chamber cine images (D, E) at the end-diastole phase as displayed. In-plane motion of each voxel point within the region of interest was subsequently tracked by the software. Examples of point tracking at peak systolic phase are displayed on both the epicardial (green dots and lines) and endocardial (red dots and lines) borders of LV (Additional file 24) and LA (F, G; Additional file 56). The dots represent the current position of tracked voxel points, and the lines represent deformation from the baseline images. Longitudinal strain values were derived from the time-strain curves of LV global longitudinal strain (GLS) (H) and LA strain, including left atrial strain during reservoir phase (LASr), left atrial strain during conduit phase (LAScd), left atrial strain during contraction phase (LASct) (I)

Back to article page