Table 1.

Means and SEM of vascular dimensions for bovine ruminal and mesenteric arteries incubated with ergovaline for 2 h prior to or not incubated prior to myograph experiments¹

Vessel and Dimension	Ergovaline, µM
	0.0	0.01	1.0	SEM	P-value
Prior incubation with ergovaline
Ruminal artery
Outside diameter, mm	2.55	2.47	2.39	0.06	0.23
Inside diameter, mm	1.30	1.28	1.19	0.04	0.20
Mesenteric artery
Outside diameter, mm	2.39	2.35	2.22	0.07	0.22
Inside diameter, mm	1.31	1.29	1.16	0.08	0.39
No prior incubation with ergovaline
Ruminal artery
Outside diameter, mm	2.43	2.39	2.30	0.07	0.43
Inside diameter, mm	1.21	1.20	1.12	0.05	0.44
Mesenteric artery
Outside diameter, mm	2.22	2.10	2.20	0.11	0.68
Inside diameter, mm	1.14	1.15	1.15	0.08	0.99

¹Ergovaline was applied in the form of a tall fescue seed extract.