Fig. 4

Echocardiography of wild-type (WT) mice 30 min before (Basal) and 1 h and 3 h after continuous sodium nitroprusside infusion (Group 1B). Data include (a) heart rate (in beats/min), (b) stroke volume (in μL), (c) cardiac output (in ml/min), (d) fractional shortening (%), and (e) ejection fraction (%), and. Data are expressed as mean ± SEM (n = 3–7). *p > 0.05 vs. Basal, p > 0.05 vs. 1H, NS not significant (p ≥ 0.05)