| VAT | 1) Ventricular Activation Time 2) Video-Assisted Thoracoscopy |
|---|---|
| AC/BC | air conduction/bone conduction [time ratio] |
| ACI-TIPI | acute cardiac ischemia-time insensitive predictive instrument |
| AcT | acceleration time |
| AHT | aggregation half time; antihyaluronidase titer; augmented histamine test; autogenous hamster tumor |