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Monocrotaline (MCT) induced pulmonary arterial hypertension (PAH) in rats after 4 weeks of MCT treatment. (a) RVSP of rats in each group. (b) The RVHI of rats in each group. RVSP: right ventricular systolic pressure; RVHI: right ventricular hypertrophy index. ∗ P < 0.05 and ∗∗ P < 0.01 compared with control group.
