PTGS2 and Right ventricular hypertrophy: Right ventricular hypertrophy was not evident after ten weeks MCT treatment in comparison to saline-treated mice (WT/saline: 0.33±0.02 mm, n = 6; COX-2 KD/saline: 0.32±0.02 mm, n = 5; WT/MCT: 0.37±0.02, n = 10; COX-2 KD/MCT: 0.40±0.03, n = 7; NS).