Normal circulation with representative right and left cardiac pressures (in mm Hg)

Representative right heart oxygen saturation = 75%; representative left heart oxygen saturation = 95%. Atrial pressures are mean pressures.

AO = aorta; IVC = inferior vena cava; LA = left atrium; LV = left ventricle; PA = pulmonary artery; PV = pulmonary veins; RA = right atrium; RV = right ventricle; SVC = superior vena cava.