Figure 4. NOS inhibitor blocks the depressant effect of ANGII in the NTS on the baroreceptor reflex bradycardia.

Original recordings of integrated phrenic nerve activity (∫PNA), heart rate (HR) and perfusion pressure (PP). A bilateral NTS microinjection of ANGII into the NTS attenuated the reflex cardiac and phrenic nerve responses. This effect of ANGII was prevented by a prior microinjection of a NOS inhibitor (l-NAME).