Figure 7. Peak and rest values of LDF after aspirin or placebo pretreatment.

Mean ± s.e.m. values of laser Doppler flowmetry (LDF) in arbitrary units (AU) at rest and peak values observed between the first and the second (A_peak), and after the second (B_peak) period of current application (1 min, 0.1 mA) observed with placebo (thin lines) or aspirin (thick lines) pretreatment, with 5 min (open bars) and 20 min (grey and black bars) intervals between the periods of current application. (*P < 0.05 from rest, #P < 0.05 between aspirin and placebo pretreatment). Oral aspirin did not affect the slow vasodilatation in response to a single current application as compared to the placebo but almost abolished the response to renewed current delivery.