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AS‐IV has a protective effect against pulmonary arterial hypertension. (A–F) Hemodynamic detection of RVSP, mPAP, RV/(LV + s), n = 8. (G–K) Representative images of haematoxylin eosin (H & E), n = 3. (L–M) CCK8 assay detection of cell viability. (N–Q) Representative images of α‐SMA immunofluorescence staining, n = 3. The data are expressed as the means ± SEM. **p < 0.01 versus the Con/Nor group. # p < 0.05, ## p < 0.01 versus the Hyp/MCT/MCTP group.
