arteriovenous anastomosis

Definition of arteriovenous anastomosis

[arteri-]ven--ous anastomosis - Abnormal connection between artery and vein (abnormal opening back of artery and vein); Anatomically, an arteriovenous anastomosis (AVA) is a high-volume, low-resistance vessel that provides a path for blood to flow directly from the arterial system to the venous system. In natural physiology, they are abundant in the skin of the hands and feet, where they play a vital role in thermoregulation by shunting blood to the surface to dissipate heat or closing to conserve it. In clinical medicine, a surgical anastomosis is often created to develop an arteriovenous fistula (AVF), which provides the high blood flow rates necessary for long-term dialysis access in patients with end-stage renal disease.

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Etymology of arteriovenous anastomosis

greek The term combines the anatomical components with a Greek description of its structure:

• Arterio-: From the Greek artēria, meaning “windpipe” or “vessel” (originally believed to carry air)​
• Venous: From the Latin vena, meaning “blood vessel” or “vein.”
• Anastomosis: Derived from the Greek anastomōsis, meaning “outlet” or “opening”. It is composed of ana- (“up” or “again”) and stoma (“mouth”), literally meaning “to provide with a mouth” or to create a communication between two channels.

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DERIVATIONS of arteriovenous anastomosis

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Query functionality

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Med roots Appendix A Prefixes Appendix B Combining Forms Appendix C Suffixes Appendix D Suffix forms