Bar graphs showing overview over the results of juvenile (n = 15) vs adult mice (n = 15). (A) Thicknesses of left ventricle (LV) walls and interventricular septum (IVS). (B) Diameters of LV and arteries. (C) Percentages of fractional area change (FAC), ejection fraction (EF) and fractional shortening (FS). (D) Peak velocities of arterial outflow and mitral valve (MV) inflow. * Statistically significant. LVID = Left ventricle internal diameter. AoD = Ascending aorta diameter. PAD = Pulmonary artery diameter. LVAW = Left ventricle anterior wall. LVPW = Left ventricle posterior wall. AoVPV = Ascending aorta valve peak velocity. DAoPV = Descending aorta peak velocity. PVPV = Pulmonary valve peak velocity. MVE = Mitral valve early wave peak. MVA = Mitral valve atrial wave peak. -d = In diastole. -s = In systole.