Figure 3From: Estimated cerebral oxyhemoglobin as a useful indicator of neuroprotection in patients with post-cardiac arrest syndrome: a prospective, multicenter observational study The relation between estimated oxyhemoglobin levels and arterial pH at hospital arrival. Hb, hemoglobin; Oxy-Hb, estimated oxy-hemoglobin; rSO2, regional cerebral oxygen saturation; *P < 0.01, **P < 0.001.Back to article page