Table 2.

Blood pressure and heart rate responses in conscious freely moving rats with or without inflation of a balloon at the junction of the superior vena cava-right atrium

Conditions	MAP (mmHg)	HR (bpm)
Baseline	114 ± 3	398 ± 19
Balloon inflation (0.05 ml)	110 ± 4	421 ± 7
Balloon inflation (0.1 ml)	110 ± 4	478 ± 18*
Recovery (after balloon deflation)	111 ± 3	401 ± 11

Results are expressed as means ±s.e.m. Mean arterial pressure (MAP) did not change over the 20 min measurement periods after balloon inflation and after balloon deflation. Heart rate (HR) increased during balloon inflation at the greater volume. n = 4.

^*Significantly different from all other conditions.