| APIVR | artificial pacemaker-induced ventricular rhythm |
|---|---|
| AR | absolute risk; accounts receivable; achievement ratio; actinic reticuloid [syndrome]; active resista... |
| ARM | adrenergic receptor material; aerosol rebreathing method; ambulatory renal monitor; anorectal manome... |
| AROM | active range of motion; artificial rupture of membranes |
| art | artery, arterial; articulation; artificial |