Ultrasound PSV change predicts AVF stenosis severity and site

In 87 patients with hemodialysis arteriovenous fistulas, the change in peak systolic velocity across a stenosis predicted ≥50% stenosis better than stenotic peak systolic velocity (AUC 0.799 vs 0.659; p=0.004).

• Higher Δstenotic-to-juxtastenotic peak systolic velocity was associated with greater risk of ≥50% stenosis (restricted cubic spline p=0.012).
• Anastomotic peak systolic velocity differentiated juxta-anastomotic stenosis from draining or outflow vein stenosis (aOR 1.003; 95% CI 1.001-1.006; p=0.002).

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