Figure 1: Echocardiography of the apical four-chamber views showing improvement in the EF before and after treating Grave's disease. (a) Initial LVEDV at the time of diagnosis: 111 mL. (b) Initial LVESV at the time of diagnosis: 69 mL. (c) LVEDV after treatment: 97 mL. (d) LVESV after treatment: 37 mL. LVEDV: Left ventricular end-diastolic volume, LVESV: Left ventricular end-systolic volume, EF: Ejection fraction