| HLR | heart-lung resuscitation |
|---|---|
| HLT | heart-lung transplantation; human lipotropin; human lymphocyte transformation |
| HLTx | heart-lung transplant |
| HM | hand movements; health maintenance; heart murmur; hemifacial microsomia; Holter monitoring; home man... |
| HMO | health maintenance organization; heart minute output |