Abbreviation Meaning V ventilation VA visual acuity VAC vincristine, actinomycin D, and cyclophosphamide (chemotherapy regimen) VAC vacuum-assisted closure (of a wound) VACTERL vertebral defects, anal atresia, cardiac defects, tracheo-esophageal fistula, renal, and limb anomalies (VACTERL association) VAD ventricular assist device vincristine, adriblastine, dexamethasone Vag vaginal VAI vincristine, actinomycin D, and ifosfamide (chemotherapy regimen) VAMP vesicle-associated membrane protein vincristine, adriblastine, methylprednisone VAS vibroacoustic stimulation visual analog scale VBG venous blood gases VBAC vaginal birth after caesarean VC vital capacity VCTC voluntary counselling and testing centers (for HIV—government centres in India) vCJD variant Creutzfeldt–Jakob disease VCUG voiding cystourethrogram VD vaginal delivery venereal disease (outdated name for sexually transmitted disease) volume of distribution VDRF ventilator-dependent respiratory failure VDRL Venereal Diseases Research Laboratory (old test for syphilis) VE vaginal examination (manual examination) VEB ventricular ectopic beat VED Vacuum Erection Device VEE Venezuelan equine encephalitis VF V-fib ventricular fibrillation VFSS videofluoroscopic swallow study VH visual hallucinations vaginal hysterectomy VHL Von Hippel–Lindau disease VIN vulvar intraepithelial neoplasia VIR Vascular Interventional Radiology VIP vasoactive intestinal peptide VLDL very-low-density lipoprotein VMA vanillylmandelic acid violent mechanical asphyxia VNPI Van Nuys prognostic scoring index (for ductal carcinoma) VO verbal order VOC vaso-occlusive crisis VOD volume of distribution VPA valproic acid VPAP variable positive airway pressure VPB ventricular premature beats (see premature ventricular contraction) VPC (PVC) ventricular premature contraction VPI Velopharyngeal insufficiency V/Q ventilation/perfusion scan VRE vancomycin-resistant enterococcus VRSA vancomycin-resistant Staphylococcus aureus VS vital signs versus visual snow VSD ventricular septal defect VSR ventricular septal rupture (see myocardial rupture) VSS vital signs stable visual snow syndrome VT ventricular tachycardia verotoxin VTE venous thromboembolism VTEC verotoxin-producing Escherichia coli, also known as enterohaemorrhagic E. coli VUR vesicoureteral reflux VWD ventral wall defect Von Willebrand disease VWF Von Willebrand factor VZIG varicella zoster immune globulin VZV varicella zoster virus

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