Use of echocardiography to evaluate the characteristics of right heart and pulmonary artery of Tibetans with hepatic hydatidosis living in a high plateau area. We recruited 222 Tibetan adults diagnosed with hydatidosis from June 2016 to June 2017 in Shiqu and Seda areas of Tibet; 40 healthy control from the same area, denoted as the high plateau group. We also include 755 Healthy adults of Han nationality living in the plain from the EMINCA study as the low altitude group. Compared to high plateau group, hydatidosis individuals showed decreased RVADed, RVTDed, increased E(T)/A(T) and reduced RVFAC and TAPSE (p < 0.05). The 2 groups did not differ in the incidence rate of tricuspid regurgitation (TR) and pulmonary regurgitation (PR) (63.9% vs. 55.0%, p = 0.281 and 15.3% vs. 5.0%, p = 0.135, respectively) or incidence of pulmonary hypertension (PH) (13.9% vs. 20.5%, p = 0.167). PH risk did not differ between hydatidosis individuals and high plateau controls (OR 0.559, 95% CI 0.243-1.287). The RVADed and TAPSE were higher and E(T)/A(T) was lower for high plateau group than low altitude group (p < 0.05). The decreased right ventricular size and reduced diastolic and systolic function were found in Tibetans with hydatidosis. Hepatic hydatidosis had no significant effect on the incidence of pulmonary hypertension in Tibetans. Healthy Tibetans showed increased right ventricular size, decreased diastolic function, and increased systolic function compared to the Han counterparts.
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