Figure 3.

Systolic blood pressure in the different experimental groups. Compared with vehicle controls, prazosin treatment resulted in significantly lower systolic blood pressure prior to coronary ligation. Blood pressure in the prazosin-treated groups was lower as a trend for the duration of the experiment. Treatments were administered 5 min before coronary ligation, shown by the arrow. *Denotes P < 0.05 for neutrophil-replete prazosin-treated rats versus vehicle controls; #denotes P < 0.05 for neutrophil-replete atenolol + prazosin-treated rats versus vehicle controls; §denotes P < 0.05 for neutrophil-depleted atenolol + prazosin-treated rats versus vehicle controls.