AbstractAcute coronary syndrome is one of the leading causes of death worldwide. Percutaneous coronary intervention (PCI), along with various devices, have been technically developed to dramatically improve mortality risk in patients with acute myocardial infarction. However, no‐reflow phenomenon still remains a problematic complication during a PCI, even in the era of drug eluting stents. There are various hypotheses and mechanisms for no‐reflow phenomenon, but none have been confirmed. Treatment for no‐reflow phenomenon also depends on various underlying conditions, but have not yet shown effective improvement. We presented a case of no‐reflow phenomenon caused by an unusual cause.

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