Figure 1 Example of radial long‐axis cardiac magnetic resonance image of the left ventricle obtained at end diastole in a patient with apical hypertrophic cardiomyopathy (B) and the detected endocardial surface (A). Schematic “bull's eye” representation of the three‐dimensional segmentation (C), with the colour notation used for the different segments in both the endocardial surface (A) and the regional left ventricular volume‐time curves (D). Ant, anterior; ant sept, antero‐septal; inf, inferior; lat, lateral; post, posterior; sept, septal.