Fig. 1

SLICE analysis and measurement of strain parameters. a Typical example of a left bundle branch block (LBBB) patient with segment length in cine (SLICE) analysis of the septal and lateral wall in the end-diastolic (ED) and end-systolic (ES) frame. b Strain curves of the septal (red) and lateral (blue) wall with measurement of basic strain values as the maximal negative strain value (peak strain) and end-systolic strain value (ESS) at aortic valve closure (determined by cine imaging of the left ventricle (LV) in the three-chamber view); timing differences measured as the septal to lateral delay in onset contraction (onset-delay) and peak negative strain delay (peak-delay); and inefficient strain patterns measured as systolic rebound stretch of the septum (SRS_sep), systolic stretch index (SSI_sep-lat) and internal stretch index (ISF_sep-lat)