| PaCO2 | partial pressure of carbon dioxide in arterial blood |
|---|---|
| PACWP | pulmonary arterial capillary wedge pressure |
| PAOD | peripheral arterial occlusive disease; peripheral arteriosclerotic occlusive disease |
| pa-pv | pulmonary arterial pressure-pulmonary venous pressure |
| PAS | para aminosalicylate; Parent Attitude Scale; patient administration system; patient appointments and... |