Rifai L et al. – In this initial description of SctO2 in patients with stage C HF, authors noted a wide range of SctO2 measurements. For most patients, there was a profound SpO2-SctO2 difference, despite near–normal peripheral oxygen saturations. The authors suggest that SctO2 is a potentially important biomarker to measure in HF patients and may be a useful marker of target organ perfusion. [more...]