Table 1.

Haemodynamic responses at baseline, during and after l-NAME infusion and after l-arginine infusion

		l-NAME (4 mg kg-1)		l-NAME recovery	+ l-Arginine (200 mg kg-1)
Parameter	Baseline	30 min	60 min	30 min	15 min
Protocol I (n = 6)
Systolic blood pressure (mmHg)	125 ± 3	135 ± 2*	138 ± 3*	141 ± 3*	128 ± 5
Diastolic blood pressure (mmHg)	67 ± 3	82 ± 2*	85 ± 2*	85 ± 2*	67 ± 4
Mean arterial blood pressure (mmHg)	87 ± 4	100 ± 3*	103 ± 3*	103 ± 2*	88 ± 4
Heart rate (beats min-1)	56 ± 3	44 ± 2*	41 ± 1*	41 ± 2*	53 ± 4
Protocol II (n = 8)
Systolic blood pressure (mmHg)	116 ± 3	135 ± 3*	143 ± 3*	147 ± 3*	—
Diastolic blood pressure (mmHg)	65 ± 1	86 ± 1*	88 ± 2*	89 ± 2*	—
Mean arterial blood pressure (mmHg)	78 ± 2	100 ± 2*	104 ± 2*	108 ± 2*	—
Heart rate (beats min-1)	57 ± 2	41 ± 1*	40 ± 2*	41 ± 2*	—

^*Significant difference from baseline (P < 0.05).