| AHF | acute heart failure; American Health Foundation; American Hepatic Foundation; American Hospital Form... |
|---|---|
| ANA | acetylneuraminic acid; American Narcolepsy Association; American Neurological Association; American ... |
| ASA | acetylsalicylic acid; active systemic anaphylaxis; Adams-Stokes attack; American Society of Anesthes... |
| ASHA | American School Health Association; American Social Health Association; American Speech and Hearing ... |
| ATS | Achard-Thiers syndrome; acid test solution; alpha-D-tocopherol acid succinate; American Thoracic Soc... |