Cabrera-Borrego, EvaBermúdez-Jiménez, FranciscoMacias Ruiz, RosaPerin, FrancescaJiménez-Jáimez, Juan2021-08-242021-08-242020-06JACC Case Rep. 2020; 2(6):935-9372666-0849http://hdl.handle.net/20.500.12105/13303We present a case of sarcomeric hypertrophy cardiomyopathy diagnosed in a child who had hypertrophy degree regression during adolescence, with no left ventricular dysfunction and no increase of the ventricular diameters. (Level of Difficulty: Intermediate.).engVoRhttp://creativecommons.org/licenses/by-nc-nd/4.0/Attribution-NonCommercial-NoDerivatives 4.0 Internacional3431738526935-93710.1016/j.jaccas.2020.04.048JACC. Case reportsopen access