After review, the user will be familiar with: A- Types of Cranial Dural Arteriovenous Fistula (DAVF). Angiographic grading scales and key angiographic imaging features Natural history, and indication and options for treatment. B- Cross-sectional imaging findings associated with cortical venous hypertension (the underlying physiology that leads to neurological events in type 2 and 3 fistulas).

DAVF are heterogeneous group of lesions with common angioarchitecture; formation of AV shunts from dural arteries to dural sinus and/or cortical vein solely within the dura.Unlike dural arteriovenous malformation (AVM), dAVF has no nidus. Synonyms and Abbreviations: Dural arteriovenous fistula (dAVF) aka Dural arteriovenous shunt (dAVS).

Etiology: Adult dAVFs are usually acquired, often idiopathic, but can result from trauma, previous craniotomy, or venous sinus thrombosis (e.g inherited prothrombotic conditions like antithrombin, protein C, and protein S deficiencies).Infant dAVFs are congenital. Pathology: Gross pathology is variable depending on location of fistula and venous drainage: Several enlarged dural arteries converging to the wall of a dural sinus or cortical vein Enlarged cortical draining veins ± dilatation, tortuosity, stenosis Microscopic features include arterialized veins with irregular intimal thickening. Pathophysiology: Dural sinus obliterated by organized...

DAVF are a heterogeneous group of vascular malformations that share arteriovenous shunts from dural vessels. Diagnosis can be difficult on CT and MRI, but should be thought of when an intracranial haemorrhage is in an unusual location or age group. The Borden classification of dural arteriovenous fistulas (DAVF) classifies these lesions into three types based on site of venous drainage and presence or absence of cortical venous drainage. Unlike the Cognard classification, the direction of blood flow within the sinus or presence of venous ectasia...

Shafik N. Wassef, MD Resident Physician, PGY4 Vice President, House Staff Council University of Iowa American Board of Radiology, Initial Certification Advisory Committee Radiological Society of North America (RSNA), Resident &Fellow Committee Society of Interventional Radiology (SIR),Resident Fellow Section Committee Interest: Interventional and Diagnostic Radiology. email:[email protected] Minako Hayakawa, MD, PhD Clinical Assistant Professor of Radiology and Neurology Departments of Radiology and Neurology University of Iowa Colin P. Derdeyn, MD, FACR Krabbenhoft Professor and Chair Department of Radiology Director, Iowa Institute of Biomedical Imaging University of...

Percutaneous transvenous embolization of a dural arteriovenous fistula through a mastoid emissary vein. Technical note. Rivet DJ, et al. J Neurosurg. 2006 Oct Borden-Shucart Type I dural arteriovenous fistulas: clinical course including risk of conversion to higher-grade fistulas. Shah MN, et al. J Neurosurg. 2012 Sep Dural arteriovenous fistula-induced thalamic dementia: report of 4 cases. Holekamp TF, et al. 2016 Jun Dural Arteriovenous Fistulae: Imaging and Management. Serulle Y, et al. Neuroimaging Clin N Am. 2016 May Outcome after intracranial haemorrhage from dural arteriovenous fistulae;...