| AVNFRP | atrioventricular node functional refractory period |
|---|---|
| DEFIANT | Doppler Flow and Echocardiography in Functional Cardiac Insufficiency Assessment of Nisoldipine Ther... |
| DUFSS | Duke-University of North Carolina Functional Social Support [questionnaire] |
| FAB | fast atom bombardment; formalin ammonium bromide; fragment, antigen-binding [of immunoglobulins]; Fr... |
| FAQ | frequently asked question; functional asessment questionnaire |