Comparing with echocardiography, the superior spatial and temporal resolution of CMR makes it more sensitive to diagnose AHCM at earlier stage, much earlier than the appearance of "ace-of-spades" configuration. In a previous study, only 60% of patients with apical segmental hypertrophy that were confirmed by CMR were diagnosed by echocardiography. Echocardiography has its technical limitations for assessing apex due to the limited regional spatial resolution. Additionally, CMR can offer prognostic features, such as apical scar and apical aneurysms.