| AFF | atrial fibrillation; atrial filling fraction; atrial flutter |
|---|---|
| ann | fib annulus fibrosus |
| FIB | Fellow of the Institute of Biology; fibrin; fibrinogen; fibrositis; fibula |
| fib | fiber; fibrillation; fibrin; fibrinogen; fibula |
| vent | fib ventricular fibrillation |