The<unk>  <unk>  is a multi-component serum assessment of pH,<unk> <unk>  tensions (PvO2 and PvCO2), bicarbonate (HCO3), and the base excess.
can be drawn from an IV catheter along with other<unk> work, unlike an arterial<unk> <unk>  (ABG),
does not accurately reflect (PaO2)
arterial values of pH, CO2, and HCO3 can be extrapolated with varying levels of accuracy
Venous blood gas
Arterial blood gas analysis
ECG 
Age adjusted D-dimer
Cardiac ultrasound
Cardiac enzymes
D-dimer
Pulmonary artery catheter