Drug Eluting Balloon Venoplasty in AV Fistula Stenosis

Inclusion Criteria: * Arteriovenous (AV) fistulas with stenosis requiring percutaneous angioplasty identified on routine diagnostic imaging or causing clinical concern on dialysis. * Fistula has been in use for at least 1 month and is \> 6 weeks old * Brachiocephalic AV fistula * Brachiobasilic AV fistula * Radiocephalic AV fistula (both proximal and distal) * Participant \>/=18 yrs old * Index lesion is less then the length of the DEB, and the reference vessel diameter is appropriate for treatment with the size range of DEB (4mm - 8mm diameter) * Participant is able to give valid informed consent Exclusion Criteria: * Allergy to iodinated Intravenous contrast * Allergy to Paclitaxel * Prosthetic grafts * Long or tandem lesions that cannot be treated with a single DEB * Thrombosed Arterio-Venous fistulas * Women who are breastfeeding, pregnant or intending to become pregnant * Participants of child-bearing age who are unwilling to use a reliable form of contraception for the duration of the study.