Fig. 3.

Mean relative spinotrapezius muscle PO₂mv responses in CHF and CHF + EXT rats under control, SNP, and l-NAME superfusion conditions. Time zero denotes the onset of muscle contractions. SE bars were omitted for clarity. Note slower PO₂mv kinetics in CHF + EXT compared with CHF rats during the control condition. SNP slowed PO₂mv kinetics in CHF + EXT compared with CHF rats, whereas l-NAME had no effects on PO₂mv kinetics in either group relative to the control condition. PO₂mv kinetics parameters are shown in Table 3 and Fig. 4.