Table 1.

Effect of microinjecting ANGII into the NTS on cardiorespiratory variables in the WHBP

		PNA cycle length			Heart rate
ANGII dose	n	Control (s)	Change (%)	PNA amplitude (% change)	Control (beats min−1)	Change (%)	Response duration (s)
5 fmol	6	3.1 ± 0.4	−26.5 ± 7*	−18.2 ± 3.6*	366 ± 6	−5.1 ± 0.9*	28.2 ± 6
50 fmol	6	3.0 ± 0.5	−38.3 ± 7*	−9.0 ± 1.1*	344 ± 15	−1.2 ± 1.9	18.0 ± 1
500 fmol	6	3.5 ± 0.2	−33.6 ± 7*	−19.0 ± 3*	356 ± 9	+0.1 ± 2.4	21.2 ± 1

PNA, phrenic nerve activity.

^*P < 0.05 relative to control (paired t test).