| LBB | left bundle branch; low back bending |
|---|---|
| RBB | right bundle branch |
| CB | Bachelor of Surgery [Lat. Chirurgiae Baccalaureus]; calcium blocker; carbenicillin; carotid body; ch... |
| HB | health board; heart block; heel to buttock; held back; hemoglobin; hepatitis B; His bundle; hold bre... |
| BIDLB | block in posteroinferior division of left branch |