Ultrasound images of Arteriovenous fistula

These lesions can occur at the site of a biopsy and are recognized on colour and spectral Doppler by
localized vessel enlargement with turbulent, sometimes high-velocity flow. A ‘pool’ of colour flow is
often present. The vein may show a regular, pulsatile pattern and be dilated. These iatrogenic fistulae
usually resolve spontaneously and are clinically insignificant. If bleeding is a clinical problem
and is ongoing, recurrent and/or severe then embolization is the treatment of choice.
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