Abstract:Objective To investigate the echocardiographic changes of right ventricular function in the patients with hyperthyroidism heart disease. Methods In this study 79 inpatients with hyperthyroidism heart disease in our hospital were randomly selected as the experimental group and 30 outpatients with hyperthyroidism were selected as the control group. And then the patients in the experimental group were divided into a heart failure group (n = 49) and a non-heart failure group (n = 30). The general data of the patients were collected; FT3, FT4 and echocardiography were examined in all patients and compared. Results The course of disease was longer, the age of the patients was older and FT3 was significantly higher in the heart failure group than in the control group and the non-heart failure group (P < 0.05). Compared with the control group, RVDd, LVDd and PAP were significantly increased but CO and LVEF were significantly decreased in the experimental group (P < 0.05). However, RVDd in the heart failure group was significantly higher than that in the non-heart failure group (P < 0.05). And RVDd was positively correlated to PAP and LVDd (P < 0.05), RVDd was inversely related to SV, CO and LVEF (P < 0.05). Conclusions RVDd is increased significantly in the patients with hyperthyroid heart disease, and in the hyperthyroidism patients with heart failure the right ventricular function decreases more significantly than the left ventricular function.