Embolization of High-Flow Arteriovenous Malformation

Vascular malformations are a complex group of lesions which are typically present at birth but may not be recognized until adolescence or later. When treatment is necessary, embolization is usually the therapy of choice and may be either palliative or curative. From a treatment perspective, the most important distinguishing factor between different vascular malformations is the presence or absence of arterial shunting. The presence of arteries and shunting defines “high-flow lesions” (arteriovenous malformations), whereas “low-flow lesions” (venous or lymphatic malformations) consist of dilated veins or lymphatics.