| VTM | mechanical tidal volume; virus transport medium |
|---|---|
| VTR | variable tandem repeats; videotape recording; vesicular transport system |
| A2 | Aortic Component of the Second Heart Sound(S2) |
| P2 | Pulmonary Component of the Second Heart Sound(S2) |
| PTC | 1) Percutaneous Transhepatic Cholangiography = PTHC ... |