Summary

A 46-year-old man presented to our hospital with ST elevation myocardial infarction (STEMI). Previous records revealed a history of recurrent non-STEMI, stroke and transient ischaemic attacks. He was thoroughly investigated with coronary angiography, a cerebral CT angiography, thrombophilia panel and autoimmune screening tests, all of which proved negative. His current episode of STEMI resulted while on dual antiplatelet therapy; the patient was investigated for P2Y12 receptor resistance, which was also negative. A diagnosis of idiopathic recurrent arterial thrombosis was established and the patient was discharged home on aspirin and warfarin. Routine follow-up has revealed no recurrence of symptoms.