Background: Percutaneous Coronary intervention are increasing by transradial access  due to decreased access site complications. However iatrogenic radial arteriovenous fistula can occur rarely and need attention. Case summary: We describe the case of 51 year old female with swelling near the  right wrist joint 3 months after percutaneous coronary intervention to Obtuse marginal. On examination, thrill was noted at the site of transradial access. Ultrasound Doppler confirmed the presence of the radial arteriovenous fistula which was surgically taken down. Following repair no thrill was noted Discussion: Though radial arteriovenous fistula are rare and benign in nature, potential hazards of high output state and distal limb loss cannot be ruled out completely. They are generally managed by surgical ligation though conservative and percutaneous approaches are mentioned in the literature.