AV Fistula Formation Blackrock Clinic Services & Procedures Vascular Procedures AV Fistula Formation AV Fistula Formation is a complex connection of an artery and a vein to help blood flow. Procedures Thorascopic Sympathectomy Venaseal AV Fistula Assessment Endovenous Laser Ablation Carotid Endarterectomy Arterial Angioplasty EVAR (Endovascular Aneurysm Repair) Amputations Temporal biopsies AV Fistula Formation Sclerotherapy Endoscopic Sympathectomy