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Effects of hypoxia on [Ca2+]i and tension in pig coronary artery. Effect of hypoxia on (A) PGF2α (10 μM)- and (B) 30 mM K (K30PSS)-contracted arteries without endothelium. (C): Average data showing the change in [Ca2+]i and tension in PGF2α- and K30PSS-contracted preparations in response to reducing organ bath O2 concentration from 20 to 1% (n = 6, *P < 0.05 by Student's t-test).
