Fig. 1From: The efficacy of percutaneous transluminal angioplasty and arteriovenous fistula reconstruction for immature arteriovenous fistulaUltrasound images of immature AVF. Abbreviation: AVF, Arteriovenous Fistula. Note: (A) Ultrasound shows significant narrowing of the venous outflow segment (arrow); (B) Color Doppler flow image shows significant narrowing of the venous outflow segment (arrow)Back to article page