| PaO2 | partial oxygen tension in arterial blood; partial pressure of oxygen in arterial blood |
|---|---|
| PH | parathyroid hormone; partial hepatectomy; partial hysterectomy; passive hemagglutination; past histo... |
| PS | pacemaker syndrome; paired stimulation; paradoxical sleep; paraspinal; parasympathetic; Parkinson sy... |
| MERRF Syndrome | Myoclonic Epilepsy & Ragged Red Fibers Syndrome |
| BCE | basal cell epithelioma; benign childhood epilepsy; bubble chamber equipment |