Abstract
Most studies on arteriovenous malformations (AVMs) and dural arteriovenous fistulas (AVFs; previously often called dural AVMs in older literature) have focused on the natural history, anatomy, histopathology, treatment, and prognosis of these lesions. More recently, studies have also been published on molecular development. However, few publications clearly describe the physiology and flow hemodynamics of these lesions. This chapter focuses on a summary of the historical and current knowledge and literature on the physiology and flow dynamics of AVMs and AVFs.