Korean Journal of Radiology

The Korean Society of Radiology (대한영상의학회)
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How to Treat Peripheral Arteriovenous Malformations

  • Ran Kim (Department of Radiology, Ewha Womans University Mokdong Hospital, College of Medicine, Ewha Womans University) ;
  • Young Soo Do (Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine) ;
  • Kwang Bo Park (Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine)
  • Received : 2020.08.05
  • Accepted : 2020.08.15
  • Published : 2021.04.01
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Abstract

Arteriovenous malformations (AVMs) are direct communications between primitive reticular networks of dysplastic vessels that have failed to mature into capillary vessels. Based on angiographic findings, peripheral AVMs can be classified into six types: type I, type IIa, type IIb, type IIc, type IIIa, and type IIIb. Treatment strategies vary with the types. Type I is treated by embolizing the fistula between the artery and the vein with coils. Type II (IIa, IIb, and IIc) AVM is treated as follows: first, reduce the blood flow velocity in the venous segment of the AVM with coils; second, perform ethanol embolotherapy of the residual shunts. Type IIIa is treated by transarterial catheterization of the feeding arteries and injection of diluted ethanol. Type IIIb is treated by transarterial or direct puncture approaches. A high concentration of ethanol is injected through the transarterial catheter or direct puncture needle. When the fistula is large, coil insertion is required to reduce the amount of ethanol. Type I and type II AVMs showed the best clinical results; type IIIb showed a satisfactory response rate. However, type IIIa showed the poorest response rate, either alone or in combination with other types. Clinical success can be achieved by using different treatment strategies for different angiographic AVM types.

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References

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