Tractograms color-coded by the propagation angle (PA). (A) PA is defined as the angle between two adjacent principal eigenvectors (êij, êij+1) relative to a given myofiber. (B) Normal human heart viewed from the base, showing a low and homogenous PA. (C) Sheep heart with a large anteroseptal infarct. (C1) A low-pass PA value of 4 degrees delineates the normal myocardium and creates a void in the infarct. (C2) Conversely, a high-pass PA value of 4 degrees robustly delineates the infarcted myocardium.