| PPAS | peripheral pulmonary artery stenosis |
|---|---|
| PVS | percussion, vibration, suction; persistent vegetative state; persistent viral syndrome; Plummer-Vins... |
| RAS | rapid atrial stimulation; recurrent aphthous stomatitis; reflex activating stimulus; reliability, av... |
| RMS | rectal morphine sulfate [suppository]; red man syndrome; repetitive motion syndrome; respiratory mus... |
| SAD | Scale of Anxiety and Depression; seasonal affective disorder; Self-Assessment Depression [scale]; se... |