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. Author manuscript; available in PMC: 2011 Oct 19.
Published in final edited form as: Pediatr Res. 2010 Oct;68(4):344–348. doi: 10.1203/PDR.0b013e3181edb9fa

Figure 2.

Figure 2

Effect of increasing intraluminal pressure (10–120 mmHg) on vascular diameter (A) and arterial constriction (pressure-induced constriction; B) in C and Beta MCA. A: MCAs from both C (□) and Beta (○) sheep had comparable passive diameters at all pressures studied. In contrast, C arteries (■) constricted more, and thus had a smaller lumen diameter in response to a stepwise increase in intraluminal pressure when compared with Beta MCA (●). (N: C=5, beta-exposed=6; p<0.05) B: A stepwise increase in intraluminal pressure resulted in significantly greater pressure-induced constriction in C (■) compared with Beta (●) MCA. (N: C=5, beta-exposed=6; p<0.01)