| ATB | at the time of the bomb [A-bomb in Japan]; atrial tachycardia with block |
|---|---|
| ATT | arginine tolerance test; aspirin tolerance time |
| AVP | abnormal vasopressin; actinomycin-vincristine-Platinol; ambulatory venous pressure; antiviral protei... |
| BART | blood-activated recalcification time |
| BlT | bleeding time; blood test; blood type, blood typing |