NaHS (5.6 mg· kg−1· d−1) was applied intraperitoneally (i.p.) for 4 weeks, and the noninvasive SBP (mmHg) of Ctrl, Ctrl + NaHS, RVH, and RVH + NaHS rats was measured weekly. Averaged data are presented as the mean ± SD; n = 6 rats/group. *P < 0.05 and **P < 0.01 vs. the data at time 0, ##P < 0.01 vs. the RVH group.