Fig. 2.
Group data of the fentanyl-evoked expiratory duration (TE) prolongation and cardiovascular responses before and after perineural treatment of the vagi with capsaicin (pCAP) and subsequent bivagotomy (A, n = 7) or after twice perineural treatments of the vagi with vehicle (pVEH1 and pVEH2; B, n = 6). Values are means ± SE; **P < 0.01, compared with the baseline values (before injecting fentanyl into the right atrium); ‡P < 0.01, compared with control (CON = without manipulation of vagi). MABP, mean arterial blood pressure.