Figure 1From: Circulating N-terminal brain natriuretic peptide and cardiac function in response to acute systemic hypoxia in healthy humans Arterial oxygen saturation, as determined by pulse oxymetry (A), and venous haemoglobin concentration (B) before hypoxia (0 min), repeatedly during 60 min of hypoxic exposure, and 2 hours after the exposure. *p < 0.05, **p < 0.01, and ***p < 0.001 compared to 0 min and 2 h, #p < 0.05 compared to 60 min.Back to article page