| IDF | inverse document frequency |
|---|---|
| IRV | inferior radicular vein; inspiratory reserve volume; inverse ratio ventilation |
| CRAO | Central Retina Artery Occlusion |
| ACO | acute coronary occlusion; alert, cooperative, and oriented; anodal closure odor |
| BAVFO | bradycardia after arteriovenous fistula occlusion |