arteriovenous fistula

arteriovenous fistula

      abnormal direct opening between an artery and a vein; it sometimes results from accidental penetration wounds or from vascular disease, or it may be congenital in origin. As a result of the defect, the arterial blood is passed to the venous side of the fistula, and the blood pressure in the vein increases, causing distension. Symptoms include an aching pain in or beyond the area of the injury and puffy legs that frequently show distended veins. When there is an arteriovenous fistula, the pulse in the vein is diminished by direct compression of the supplying artery, resulting in a continuous murmur that may help in diagnosing and locating the fistula. Normal blood flow can usually be reestablished by surgery.

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Universalium. 2010.

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Look at other dictionaries:

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  • arteriovenous fistula — 1. a communication, sometimes congenital but often traumatic, between an artery and a nearby vein, so that blood flows directly into the vein (aneurysmal varix) or else is carried into the vein by a connecting sac (varicose aneurysm). 2. a… …   Medical dictionary

  • arteriovenous fistula — noun an abnormal connection between an artery and a vein …   Wiktionary

  • Dural arteriovenous fistula — Classification and external resources This dural arteriovenous fistula of the superior sagittal sinus drains into subarachnoid veins and is classified as Borden type IIIb. DiseasesDB …   Wikipedia

  • Fistula — Classification and external resources MeSH D005402 In medicine, a fistula (pl. fistulas or fistulae) is an abnormal[1] connection or passageway between two epithelium lined organs or vessels that …   Wikipedia

  • arteriovenous — adj. 1. connecting an artery to a vein. an arteriovenous fistula [WordNet 1.5] || …   The Collaborative International Dictionary of English

  • coronary arteriovenous fistula — coronary artery fistula a congenital fistula between a coronary artery and a cardiac chamber, pulmonary trunk or vein, coronary sinus, or vena cava, particularly between the right artery and the right heart …   Medical dictionary

  • pulmonary arteriovenous fistula — a congenital fistula between the pulmonary arterial and venous systems, allowing unoxygenated blood to enter the systemic circulation …   Medical dictionary

  • fistula — An abnormal passage from one epithelial surface to another epithelial surface. [L. a pipe, a tube] abdominal f. a fistulous passage connecting one of the abdominal viscera …   Medical dictionary

  • Arteriovenous malformation — Infobox Disease Name = Arteriovenous malformation Caption = DiseasesDB = 15235 ICD10 = ICD10|Q|27|3|q|20, ICD10|Q|28|0|q|20, ICD10|Q|28|2|q|20 ICD9 = ICD9|747.6, ICD9|747.81 ICDO = OMIM = MedlinePlus = 000779 eMedicineSubj = search eMedicineTopic …   Wikipedia

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