The Pulmonary capillary wedge pressure
), as measured by a Swan-Ganz catheter
, is the pressure measured in a pulmonary artery after occlusion of that artery. Because of the large compliance
of the pulmonary circulation
, it provides an indirect measure of the left atrial pressure.
For example it's considered the gold standard for determining the cause of acute pulmonary edema. Physiological pressure; 1-10 mm Hg.
Go to http://www.cvphysiology.com/Heart%20Failure/HF008.htm for a good explanation.