Figure 1.

Correlation between flow orientation changes and volumetric response. Correlation between change in the orientation of flow momentum from CRT-ON to CRT-OFF (δφ = φ_OFF – φ_ON) and relative volumetric reduction from pre-implant to follow-up of (A) end-diastolic volume (ΔEDV = EDV_post− EDV_pre) and (B) end-systolic volume (ΔESV = ESV_post− ESV_pre). The coloured green and red points indicate, respectively, the individual cases of SR and NR patients analysed in the text and in the subsequent pictures.