| PPB | platelet-poor blood; pneumococcal pneumonia and bacteremia; positive pressure breathing |
|---|---|
| PSP | pancreatic spasmolytic peptide; paralytic shellfish poisoning; parathyroid secretory protein; period... |
| PSW | primary surgical ward; positive sharp wave; psychiatric social worker |
| PVP | penicillin V potassium; peripheral vein plasma; peripheral venous pressure; polyvinylpyrrolidone; po... |
| R' | in electrocardiography, the second positive deflection during the QRS complex |