| SAN | Sino-Atrial Node; 동방결절 = SA node |
|---|---|
| VA shunt | Ventriculo-Atrial shunt |
| A-a | alveolar-atrial |
| AAI | acute alveolar injury; Adolescent Alienation Index; American Association of Immunologists; atrial in... |
| ac | acceleration; acetyl; acid; acromioclavicular; acute; alternating current; antecubital; anterior cha... |