| AITT | arginine insulin tolerance test; augmented insulin tolerance test |
|---|---|
| ATN | acute tubular necrosis; augmented transition network |
| AV | Adriamycin and vincristine; air velocity; allergic vasculitis; anteroventral; anteversion; anticipat... |
| aVF | unipolar limb lead on the left leg in electrocardiography |
| aVL | unipolar limb lead on the left arm in electrocardiography |