| AAI | acute alveolar injury; Adolescent Alienation Index; American Association of Immunologists; atrial in... |
|---|---|
| AAT | Aachen Aphasia Test; academic aptitude test; alanine aminotransferase; alkylating agent therapy; alp... |
| AOO | anodal opening odor; atrial asynchronous (competitive, fixed-rate) [pacemaker] |
| APIVR | artificial pacemaker-induced ventricular rhythm |
| DDD | AV universal [pacemaker]; defined daily dose; degenerative disc disease; dehydroxydinaphthyl disulfi... |