<unk>  <unk>  describes the<unk>  of blood in the thoracic vena cava, near the right atrium of the heart.<unk>  reflects the amount of blood returning to the heart and the ability of the heart to pump the blood into the arterial system.
It is a good approximation of right atrial<unk> , which is a major determinant of right ventricular end diastolic volume. (However, there can be exceptions in some cases.)
Central venous pressure
Mean arterial pressure
Pulmonary capillary wedge pressure
Arteriovenous oxygen difference
Pulse pressure
Cardiac output
Stroke volume
Pulse oximetry