Table 3.

Cardiovagal baroreceptor reflex sensitivity

	Delay, heartbeats	Wild Type, ms/mmHg	Brs3−/y, ms/mmHg	P
BRSup	0	3.1 ± 0.8	2.8 ± 0.6	0.50
	1	2.5 ± 0.6	2.3 ± 0.5	0.44
	2	2.4 ± 0.8	2.1 ± 0.3	0.31
BRSdown	0	2.6 ± 0.9	2.6 ± 0.6	0.92
	1	2.9 ± 0.7	2.7 ± 0.8	0.79
	2	2.9 ± 0.8	2.6 ± 0.6	0.52

Baroreceptor sensitivity (ms/mmHg) was measured in 1 h of the light phase by sequence analysis of episodes with increasing (BRSup) and decreasing (BRSdown) blood pressure as detailed in materials and methods. Delay is of 0, 1, or 2 heartbeats using intervals with increasing or decreasing blood pressure and RR interval, as indicated. n = 5–6/group.