Figure 1
From: Diffusion MRI tractography of the human heart In Vivo at end-diastole and end-systole
DTI tractography of the heart in vivo at end-diastole (A, C) and end-systole (B, D). Fiber tracts are viewed from their subepicardial (A, B) and subendocardial surfaces (C, D) and are color-coded by their median helix angle. Fiber tracts in the subepicardium at end-systole become more oblique (red) as the myocardium contracts. However, at end-diastole, as the LV outer circumference expands, the subepicardial fibers assume a more right-handed (less oblique) orientation.