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Question category: Cardiology

A 65 year old gentleman with hypertension and peripheral vascular disease has recently had a transfemoral angiogram. He presents with painful lesions on his shins and has noticed his toes blue and painful. On examination there is also evidence of livedo reticularis. Bloods reveal acute renal failure and an eosinophila. Platelet count and coagulation profile are normal. Cardiovascular examination is normal. Which of the following is the most likely cause?

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