| PCB | paracervical block; polychlorinated biphenyl; portacaval bypass; postcoital bleeding; procarbazine |
|---|---|
| PNB | p-nitrobiphenyl; perineal needle biopsy; peripheral nerve block; premature nodal beat |
| RBBB | right bundle-branch block |
| RBBsB | right bundle-branch system block |
| RDLBBB | rate-dependent left bundle-branch block |