Table 1.

Basal levels of haemodynamic variables during each of the two experimental periods in Protocol 1 (n=4)

	Control period	8-SPT treatment
MAP (mmHg)	71±2	75±2
HR (beats min−1)	224±12	212±11
RBF (ml min−1)	27±4	23±4
CBF (units)	243±34	210±20
MBF (units)	28±7	25±8

Abbreviations: CBF, cortical blood flow measured by laser Doppler flowmetry; HR, heart rate; MAP, mean arterial pressure; MBF, medullary blood flow measured by laser Doppler flowmetry; RBF, renal blood flow; 8-SPT, 8-(p-sulphophenyl)theophylline.

Results are presented as mean±s.e.

Levels of these variables were not significantly different after, relative to before, 8-SPT treatment as determined by paired t-test.