Fig. 1
Adapted from “perioperative clinical utility of myocardial deformation imaging: a narrative review” by E Abuelkasem, 2019, Br J Anaeth, 123 (4):408-420. Copyright 2019 with permission from Elsevier and “acute microstructural changes after ST segment elevation myocardial infarction assessed with diffusion tensor imaging” by A Das, 2021, Radiology, 299(1): 86-96. Copyright 2021 with permission from RSNA
A Shows directions of strain in the left ventricle (LV). C Circumferential strain, R radial strain, L longitudinal strain. Helix angle (HA) map showing arrangement of myocytes from left-handed orientation in the epicardium, to circumferential orientation in the mid-wall to right-handed orientation in the endocardium. B Case of inferior ST segment elevation myocardial infarctio (STEMI). A subendocardial scar is shown on the late gadolinium enhancement (LGE) short axis image (arrow) with reduced radial and longitudinal strain in the corresponding area of scar. The cardiac diffusion tensor imaging (cDTI) images show a loss of right handed orientation (RHM) on the HA map and a loss of second eigenvector (E2A) in the same scarred mid inferior segment.