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A 62-year-old female underwent successful primary percutaneous coronary intervention for an acute anterior wall myocardial infarction via the right radial artery access. The patient presented 3 months later for a routine follow-up. There was a dilated superficial vein at the level of the distal right radial artery, with a palpable thrill at the access site (figure 1A). Subsequent Doppler ultrasound imaging demonstrated a radial arteriovenous fistula with a neck of 2 mm (figure 1B; see online supplementary video 1). The brachial angiography showed a right radial artery to venous fistula with multiple collateral veins (figure 1C; see online supplementary video 2). The patient was managed conservatively as she was asymptomatic, and the shunt was haemodynamically insignificant.
Supplementary file 1
Supplementary file 2
Radial artery access is currently being routinely used for cardiac catheterisation because of the lower risk of vascular complications and early patient ambulation. The common access site complications observed are radial artery spasm, haematoma and reduced or absent radial pulse. Arteriovenous fistula is a well-recognised complication after cardiac catheterisation via the femoral or brachial approach, but it is extremely rare in radial artery access-based procedures.1 This is because only small veins are present in the vicinity of the radial artery. Unlike femoral arteriovenous fistulas, there are no studies evaluating the risk factors for developing radial arteriovenous fistulas. The use of ultrasound-guided radial artery cannulation may minimise the risk of an arteriovenous fistula. Radial arteriovenous fistula can be managed conservatively in the absence of symptoms and haemodynamically insignificant shunt. Invasive treatment options include percutaneous closure of fistula and surgical correction.2
Contributors Both the authors have contributed equally to the patient evaluation and write-up of the manuscript.
Competing interests None declared.
Patient consent Obtained.
Ethics approval Sri Jayadeva Institute of Cardiovascular Sciences and Research.
Provenance and peer review Not commissioned; internally peer reviewed.
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