| A/H | amenorrhea-hyperprolactinemia |
|---|---|
| A/K, ak | above knee [amputation] |
| A/kg | amperes per kilogram |
| A/m | amperes per meter |
| A/N | antenatal; as needed |
| A/P | abdominal/perineal; antepartum; ascites/plasma [ratio] |
| A/R | apical/radial |
| A/V | ampere/volt; arteriovenous |
| A1 | aortic first sound |
| a1AT | alpha-1-antitrypsin |