| ESFL | end-systolic force-length relationship |
|---|---|
| ESL | end-systolic length; extracorporeal shockwave lithotripsy |
| ETL | echo train length; expiratory threshold load |
| FRV | full-length retroviral [sequence]; functional residual volume |
| FVL | femoral vein ligation; flow volume loop; force, velocity, length |