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Right ventricular pressures of normoxic, hypoxic, and reoxygenated mice. Mean right ventricular (RV) pressure (± SE) was determined for Hif1a+/+ (open bars) and Hif1a+/– (closed bars) mice exposed to 21% (n = 6) or 10% (n = 11–15) O for 3 weeks, or exposed to 10% O for 3 weeks followed by 21% O for 3 h (n = 5). *P = 0.003; #P = NS (Student's t test). NS, not significant.
