After RVSP measurement, the animals were sacrificed and hearts were collected. Atrium was trimmed and the free wall of RV was separated from the left ventricle and septum (LV+S). RV and LV+S of each heart were weighted, and the ratio of RV/(LV+S) was calculated to assess RVH. The animals were sacrificed and the lung tissues were harvested and stored at -80 °C until further analysis.
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