Figure 1From: Occult hypoperfusion is associated with increased mortality in hemodynamically stable, high-risk, surgical patientsTime course of (a) blood lactate and (b) arterial bicarbonate concentrations in survivors (●) and in nonsurvivors (▽). Values are mean ± standard deviation. *Significant (P < 0.05) differences between the two groups at 24 hours. **Significant (P < 0.05) differences versus baseline.Back to article page