The saturation falls passing from the left atrium to the right atrium and further to the right ventricle, consistent with mixing of pulmonary venous return and inferior vena cava return, as would be expected in this patient.
The saturation falls passing from the left atrium to the right atrium and further to the right ventricle , consistent with mixing of pulmonary venous return and inferior vena cava return , as would be expected in this patient .