Copy of `Dorland's Medical Dictionary`

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Dorland's Medical Dictionary Category: Health and Medicine > Medical Dictionary Date & country: 31/12/2010, USA Words: 39128

venereal wart
condyloma acuminatum.

venereologist
(vә-nēr″e-ol´ә-jist) a specialist in venereology.

venereology
(vә-nēr″e-ol´ә-je) the study and treatment of sexually transmitted diseases.

venesection
(ven″ә-sek´shәn) phlebotomy.

Venezuelan equine encephalomyelitis
a viral disease of horses and mules, transmissible to humans; it was first isolated in Venezuela, and later observed as far north as the southwestern United States. Human infection resembles influenza, with little or no indication of nervous system involvement.

Venezuelan hemorrhagic fever
a sometimes fatal hemorrhagic fever occurring in west central Venezuela, primarily in settlers moving into areas of cleared forest, caused by infection with the Guanarito virus, whose major reservoir is the cotton rat Sigmodon alstoni. Besides the fever and hemorrhaging, other characteristics include headache, myalgia, weakness...

venipuncture
(ven´ĭ-punk″chәr) surgical puncture of a vein.

venisuture
(ven″ĭ-soo´chәr) phleborrhaphy.

venlafaxine
(ven″lә-fak´sēn) an inhibitor of serotonin and norepinephrine uptake that stimulates neurotransmitter activity in the central nervous system; administered orally as the hydrochloride salt as an antidepressant and antianxiety agent.

venoclysis
(ve-nok´lĭ-sis) phleboclysis.

venogram
(ve´no-gram) phlebogram. venous-pulse tracing.

venography
(ve-nog´rә-fe) phlebography.

venom
(ven´әm) a poison, especially one secreted by a serpent, insect, or other animal. adj., ven´omous., adj. Russell viper venom the venom of Vipera russelli (the Russell viper), which acts in vitro as an intrinsic thromboplastin and is useful in defining deficiencies of factor...

venomotor
(ve″no-mo´tәr) controlling dilation or constriction of the veins.

venoocclusive
(ve″no-ә-kloo´siv) pertaining to or characterized by obstruction of the veins.

venoocclusive disease of the liver
symptomatic occlusion of the small hepatic venules, caused by ingestion of any of several different substances such as Senecio tea or certain chemotherapy agents (hepatotoxins); it can also be caused by radiation. Many patients recover after withdrawal of the offending toxin, but some progress to portal hypertension and l...

venoperitoneostomy
(ve″no-per″ĭ-to″ne-os´tә-me) insertion of an open end of the saphenous vein into the peritoneum for drainage of ascites.

venosclerosis
(ve″no-sklә-ro´sis) phlebosclerosis.

venosity
(ve-nos´ĭ-te) the condition of being venous. excess of venous blood in a part. a plentiful supply of veins.

venostasis
(ve″no-sta´sis) venous stasis.

venotomy
(ve-not´ә-me) phlebotomy.

venous
(ve´nәs) pertaining to a vein or veins.

venous foramen
foramen venae cavae. foramen of Vesalius.

venous hemangioma
a cavernous hemangioma in which the dilated vessels have thick, fibrous walls.

venous insufficiency
inadequacy of the venous valves and impairment of venous return from the lower limbs (venous stasis), often with edema and sometimes with stasis ulcers at the ankle.

venous pressure
the blood pressure in a vein; see also central venous pressure.

venous pulse
the pulsation over a vein, especially over the right jugular vein.

venous pump
muscle pump.

venous rete
venous network.

venous sinus
a large vein or channel for the circulation of venous blood, such as one of the sinuses of the dura mater. s. venosus (def. 1).

venous sinus of sclera
a circular channel at the junction of the sclera and cornea, into which aqueous humor filters from the anterior chamber of the eye. Called also Schlemm canal.

venous sinuses of dura mater
large channels for venous blood forming an anastomosing system between the layers of the dura mater of the brain, receiving blood from the brain and draining into the veins of the scalp or deep veins at the base of the skull.

venous sulci
grooves on the internal surfaces of the cranial bones for the meningeal veins.

venous ulcer
venous stasis ulcer ulceration of the skin of the lower leg, often around the ankle, due to venous insufficiency and venous stasis. This is due to deep vein thrombosis and failure of the venous valves to prevent backflow of blood. Chronic varicosities of the veins can also cause venous stasis. This type of ulcer is difficult to treat ...

venovenostomy
(ve″no-ve-nos´tә-me) phlebophlebostomy.

vent
(vent) an opening or outlet, such as an opening that discharges pus, or the anus.

venter
(ven´tәr) a fleshy contractible part of a muscle; called also belly. abdomen. a hollowed part or cavity.

ventilation
(ven″tĭ-la´shәn) the process or act of supplying a house or room continuously with fresh air. in respiratory physiology, the process of exchange of air between the lungs and the surrounding environment; see alveolar ventilation and pulmonary ventilation. See also respiration (def. 1). Called als...

ventilation test
measurement of the quantity of air exhaled by a person during a period of exercise. See also pulmonary function test.

ventilation tube
a tube inserted after myringotomy in chronic cases of middle ear effusion, such as in secretory or mucoid otitis media; it provides ventilation and drainage for the middle ear during healing, and is eventually extruded. Called also tympanostomy tube.

ventilation-perfusion scan
V/Q scan a scintigraphic technique for demonstrating perfusion defects in normally ventilated areas of the lung in the diagnosis of pulmonary embolism, consisting of the imaging of the distribution of an inhaled radionuclide followed by the imaging of the perfusion of the lungs by an injected radionuclide.

ventilator
(ven´tĭ-la″tәr) respirator (def. 1). an apparatus used in artificial respiration to mechanically assist (either intermittently or continuously) or control the ventilatory action of the lungs. It is done as a supportive measure in patients suffering from respiratory paralysis, as well as fo...

ventilator-associated pneumonia
a frequently fatal type of pneumonia seen in patients breathing with a ventilator; it is the most common type of nosocomial pneumonia and may be bacterial, viral, or fungal.

Ventolin
(ven´tә-lin) trademark for preparations of albuterol, a bronchodilator.

ventrad
(ven´trad) toward a belly, venter, or ventral aspect.

ventral
(ven´trәl) pertaining to the abdomen or to any venter. directed toward or situated on the belly surface; opposite of dorsal; see also anterior.

ventral funiculus of spinal cord
anterior funiculus of spinal cord.

ventral hernia
abdominal hernia.

ventral horn of spinal cord
anterior horn of spinal cord.

ventral plate
floor plate.

ventralis
(vәn-tra´lis) Latin word meaning ventral; a term used in anatomy.

ventricle
(ven´trĭ-kәl) a small cavity or chamber, as in the brain or heart. adj., ventric´ular., adj.

ventricle of heart
see left ventricle and right ventricle.

ventricular aneurysm
cardiac aneurysm.

ventricular asynchronous pacemaker
an artificial cardiac pacemaker that stimulates the ventricle at a constant rate, without sensing atrial or ventricular activity; now rarely used except to initiate or terminate some tachycardias. Called also VOO pacemaker.

ventricular beat
an ectopic beat originating in a ventricle.

ventricular block
obstruction to the flow of cerebrospinal fluid within the ventricular system or through the exit foramina (foramina of Magendie and Luschka) by which the ventricles communicate with the subarachnoid space; it results in obstructive hydrocephalus.

ventricular cell
any of the columnar epithelial cells of the neural tube.

ventricular complex
the Q, R, S, and T waves of the electrocardiogram, representing ventricular electrical activity. See also atrial complex.

ventricular extrasystole
one in which either a pacemaker or a re-entry site is in the ventricular structure.

ventricular flutter
a possible transition stage between ventricular tachycardia and ventricular fibrillation, the electrocardiogram showing rapid, uniform, and virtually regular oscillations, 250 or more per minute.

ventricular fold
vestibular fold a false vocal cord.

ventricular gallop
S3 gallop.

ventricular hypertrophy
hypertrophy of the myocardium of a ventricle of the heart, due to chronic pressure overload; it is manifest electrocardiographically by increased QRS complex voltage, frequently accompanied by repolarization changes.

ventricular ligament
vestibular ligament.

ventricular pacemaker
an ectopic pacemaker found in a ventricle.

ventricular rhythm
the ventricular contractions which occur in cases of complete heart block.

ventricular septal defect
a congenital heart defect in which the opening in the ventricular septum (normal in the fetus) persists after birth, in either the muscular or fibrous portion, most often due to failure of the bulbar septum to completely close the interventricular foramen. This permits flow of blood directly from one ventricle to the othe...

ventricular septum
interventricular septum.

ventricular tachycardia
an abnormally rapid ventricular rhythm with aberrant ventricular excitation, characterized by at least three consecutive ventricular complexes of more than 100 beats per minute. It is generated within the ventricle and is most often associated with atrioventricular dissociation.

ventriculitis
(ven-trik″u-li´tis) inflammation of a ventricle, especially a cerebral ventricle.

ventriculoatrial shunt
the surgical creation of a communication between a cerebral ventricle and a cardiac atrium by means of a plastic tube; done for relief of hydrocephalus.

ventriculoatriostomy
(ven-trik″u-lo-a″tre-os´tә-me) ventriculoatrial shunt.

ventriculocisternostomy
(ven-trik″u-lo-sis″tәr-nos´tә-me) surgical creation of a communication between the third ventricle and the interpeduncular cistern, for drainage of cerebrospinal fluid in hydrocephalus.

ventriculogram
(ven-trik´u-lo-gram) a radiogram of the cerebral ventricles (no longer performed) or of the ventricles of the heart.

ventriculography
(ven-trik″u-log´rә-fe) radiography of the cerebral ventricles after introduction of air or other contrast medium. This study is no longer used to examine the brain; being replaced by CT and MRI. radiography of a ventricle of the heart after injection of a contrast medium. f...

ventriculomegaly
(ven-trik″u-lo-meg´ә-le) gross enlargement of a ventricle of the brain, as by hydrocephalus.

ventriculometry
(ven-trik″u-lom´ә-tre) measurement of intracranial pressure.

ventriculoperitoneal shunt
a communication between a cerebral ventricle and the peritoneum by means of plastic tubing; done for the relief of hydrocephalus.

ventriculopuncture
(ven-trik´u-lo-pungk″chәr) surgical puncture of a lateral ventricle of the brain.

ventriculoscopy
(ven-trik″u-los´kә-pe) endoscopic examination of the cerebral ventricles.

ventriculostomy
(ven-trik″u-los´tә-me) surgical creation of a free communication between the third ventricle and the interpeduncular cistern for relief of hydrocephalus.

ventriculosubarachnoid
(ven-trik″u-lo-sub″ә-rak´noid) pertaining to the cerebral ventricles and subarachnoid space.

ventriculotomy
(ven-trik″u-lot´ә-me) incision of a ventricle.

ventriculovenostomy
(ven-trik″u-lo-ve-nos´tә-me) ventriculovenous shunt.

ventriculovenous shunt
a communication between a lateral ventricle and the venous system by means of a plastic tube; done for relief of hydrocephalus.

ventriculus
(ven-trik´u-lәs) ventricle. stomach.

ventricumbent
(ven″trĭ-kum´bәnt) prone.

ventriduct
(ven´trĭ-dukt) to bring or carry ventrad.

ventrimeson
(vәn-trim´ә-son) the median line on the ventral surface. adj., ventrime´sal, adj. .

ventrofixation
(ven″tro-fik-sa´shәn) fixation of a viscus, such as the uterus, to the abdominal wall; called also ventrosuspension.

ventrohysteropexy
(ven″tro-his´tәr-o-pek″se) ventrofixation.

ventrolateral
(ven″tro-lat´әr-әl) both ventral and lateral; see also anterolateral.

ventrose
(ven´trōs) having a belly-like expansion.

ventrosuspension
(ven″tro-sәs-pen´shәn) ventrofixation.

venturi
(ven-tu´re) Venturi mask.

Venturi mask
(ven-too´re) a type of disposable face mask used to deliver a controlled oxygen concentration to a patient (see oxygen therapy.) The flow of 100 per cent oxygen through the mask draws in a controlled amount of room air (21 per cent oxygen). Called also venturi.

Venturi principle
(ven-tu´re) an inverse association of gas or fluid pressure, velocity of flow, and restriction of passage. The Venturi principle states that the pressure drop distal to a restriction can be nearly restored to the prerestriction pressure if there is a dilatation of the passage immediately distal to the stenosis, wi...

venula
(ven´u-lә) Latin word meaning venule; a term used in anatomy.

venule
(ven´ūl) any of the small vessels that collect blood from the capillary plexuses and join to form veins. adj., ven´ular, adj. .