| VOS | vision, left eye [Lat. visio, oculus sinister] |
|---|---|
| VR | right arm [electrode]; valve replacement; variable ratio; vascular resistance; venous reflux; venous... |
| IRC | International Red Cross |
| MERRF Syndrome | Myoclonic Epilepsy & Ragged Red Fibers Syndrome |
| MR test | Methyl Red test |