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Concentration-dependent effects of nitrite on the blood pressure (BP) and heart rate of anesthetized rats with normal body temperature (37°C). A: systolic BP. B: diastolic BP. C: Heart rate. Ordinate BP is expressed as percentage baseline (B) that was assigned as 100%; abscissa, concentration of nitrite in μM. Each symbol with a vertical bar represents the mean ± SE of 4 experiments with different animals. *P < 0.05 vs. baseline.
