| Hfr | heart frequency; high frequency |
|---|---|
| HHD | high heparin dose; home dialysis; hypertensive heart disease |
| HHS | [Department of] Health and Human Services; Hearing Handicap Scale; hereditary hemolytic syndrome; hu... |
| HHT | head halter traction; hereditary hemorrhagic telangiectasia; heterotopic heart transplantation; homo... |
| HI | half-scan with interpolation; head injury; health insurance; hearing impaired; heart infusion; hemag... |