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Medical Dictionary - Letter: v



TermDefinition
Vvolt
V/Qventilation/perfusion
VAvisual acuity
vaccvaccination
vaccinationAdministration of vaccines to stimulate the host's immune response.
vaccineA suspension of killed or attenuated microorganisms administered for the prevention or treatment of infection.
VADvenous assist device
vag/ovagus nerve
vagin/ovagina
vaginaAn muscular tube connecting the cervix of the uterus to the vulva and exterior of the body.
vaginalPertaining to the vagina.
vaginitisInflammation of the vagina marked by pain and a purulent discharge.
vagus nerveThe tenth cranial nerve.
valsalva maneuverForced expiratory effort against a closed windpipe, impeding the return of venous blood to the heart.
valv/ovalve
varic/ovarices (swollen veins)
varicellaPrimary infection causes chickenpox; reactivation causes herpes zoster.
varicoceleAbnormal enlargement of the veins of the spermatic cord.
varicose veinsEnlarged, twisted veins.
vas/ovessel
vascul/oblood vessel
vascularPertaining to blood vessels.
vasculitisInflammation of a blood vessel.
vasectomySurgical removal of the ductus deferens usually as a means of sterilization.
vasoconstrictionNarrowing of blood vessels.
vasoconstrictorDrugs used to cause constriction of the blood vessels.
vasodilationWidening of blood vessels.
vasodilatorDrugs used to cause dilation of the blood vessels.
vasovasostomyA surgical procedure in which the effects of a vasectomy (male sterilization) are reversed.
VCvital capacity
VCTvenous clotting time=
VDvenereal disease
vectorAn organism, such as a mosquito or tick, that spreads disease from one host to another.
veinsThe vessels carrying blood away from the capillary beds.
ven/ovein
venae cavaeThe two venous trunks which returns blood to the heart. Inferior venae cavae receives blood from the lower body while superior venae cavae returns blood from the upper body..
venere/osexual intercourse
venomsPoisonous animal secretions forming fluid mixtures of many different enzymes, toxins, and other substances.
venous insufficiencyImpaired venous blood flow or venous return (venous stasis), usually caused by inadequate venous valves. Venous insufficiency often occurs in the legs.
venous thrombosisThe formation or presence of a blood clot within a vein.
ventilatorsMechanical devices used to assist respiration.
ventr/ofront, belly side
ventralPertaining to the belly or front of the body.
ventriclesThe two large heart chambers that receive blood from the atria and pump it out to the systemic and pulmonary circulatory systems.
ventricul/oventricle
ventricular fibrillationThe uncoordinated, rapid firing of electrical impulses (400-600/min) in the ventricles. This ventricular quivering prevents cardiac output. Can results in unconsciousness and death if not immediately treated.
ventricular flutterRapid, unstable ventricular tachycardia (150-300 beats/min) with a large sine-wave appearance. If untreated, ventricular flutter typically progresses to ventricular fibrillation.
ventricular tachycardiaFast but regular heart rhythm originating in the ventricles. Often caused by heart disease, but may also occur in young people. Some medications and nonprescription decongestants can trigger ventricular tachycardia.
venul/ovenule (small vein in lungs)
verm/iworm, wormlike
verrucaePlantar warts that commonly occur on the soles of the feet or around the toe area.
vertebraeThe bones or segments composing the spinal column,
vertebrateAn animal with a spinal cord surrounded by cartilage or bone
vertigoA feeling of dizziness and disorientation.
vesic/obladder, blister
vesicul/ovesicle
vestibul/ovestibule
vestigesA trace of something, usually a nonfunctioning structure or a behavior, that is a remnant of our evolutionary history.
vestigialPertaining to vestiges.
VFventricular fibrillation
Vf (2)field of vision
Vfibventricular fibrillation
vipomaAn endocrine tumor that secretes vasoactive intestinal peptide, that causes vasodilation, relaxation of smooth muscles, watery diarrhea, hypokalemia and hypochlorhydria.
vir/ovirus
viralPertaining to or caused by a virus.
viremiaThe presence of viruses in the blood.
virionThe compete viral particle.
virologyThe study of the structure, growth, function, genetics, and reproduction of viruses and virus diseases.
virusA small infectious agent which lacks independent metabolism and is able to replicate only within a living host cell. The individual particle (virion) consists of either DNA or RNA and a protein capsid.
viscer/obody organs
viscerathe large interior organs in any one of the three great cavities of the body, especially in the abdomen.
viscosityResistance to flow.
vit/olife
vital capacityThe volume of air that is exhaled by a maximal expiration following a maximal inspiration.
vital signsThe signs of life that may be monitored or measured, namely pulse rate, respiratory rate, body temperature, and blood pressure.
vitaminsOrganic substances that are required in small amounts for maintenance and growth.
vitellinePertaining to the vitellus.
vitellusYolk of an egg.
vitiligoA chronic disease that causes white patches develop on the skin.
vitre/ovitreous body
vitrectomySurgery to remove vitreous gel from the eye.
vitreous bodyThe transparent, semi gelatinous substance that fills the cavity behind the crystalline lens of the eye and in front of the retina.
vitrificationTo convert into a glassy substance.
vivi-live, alive
vivisectionExperiments performed on living animals involving surgery.
VLDLvery low density lipoprotein
VNAVisiting Nurse Association
vocal cordsA pair of cone-shaped elastic mucous membrane projecting from the laryngeal wall and forming a narrow slit between them. Each contains a vocal ligament that shortens or relaxes the vocal cord to control sound production.
volvolume
volarPertaining to the palm or sole.
-volemiablood volume
volitionVoluntary activity without external compulsion.
vomitingThe forcible expulsion of the contents of the stomach through the mouth.
VSvital signs
VSDventricular septal defect
VTventricular tachycardia
vulv/ovulva
vulvaThe external genitalia of the female. It includes the clitoris, the labia, the vestibule and its glands.
vulvitisInflammation of the vulva.
vvveins
VWvessel wall

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