Coronary stent infection causing perforation and thrombotic occlusion after early post-PCI MRSA bacteraemia: an autopsy case report

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ID: 327745
2026
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Abstract
Abstract Background Coronary stent infection (CSI) is rare but can be fatal. In Staphylococcus aureus bacteraemia (SAB), treatment duration is guided by classification as uncomplicated or complicated SAB. However, whether a recently implanted drug-eluting stent (DES) should be regarded as intravascular prosthetic material remains unclear. Case Summary An 83-year-old woman underwent PCI for a severely calcified right coronary ostial lesion. After rotational atherectomy, a DES was implanted, and final angiography showed adequate expansion. On hospital day 7, cellulitis developed at a peripheral intravenous catheter site. Blood and skin cultures grew methicillin-resistant Staphylococcus aureus (MRSA). Intravenous linezolid was started because of renal dysfunction. The episode was considered to be uncomplicated SAB because follow-up blood cultures were negative, fever resolved, transthoracic echocardiography showed no vegetation, and no metastatic infection was identified. Antimicrobial therapy was stopped after 14 days. Fever and inflammatory markers did not recur, but nonspecific chest symptoms persisted. Follow-up coronary angiography showed no clear abnormalities. After discharge, MRSA bacteraemia recurred. The patient developed shock with inferior ST-segment elevation, followed by pulseless electrical activity and death. Autopsy revealed coronary wall disruption, surrounding haemorrhage, ostial thrombotic occlusion, gram-positive cocci, and neutrophilic infiltration near the right coronary ostial stent, leading to the diagnosis of CSI. Discussion This case raises the possibility that a recently implanted DES may serve as an occult endovascular focus during SAB. Negative follow-up blood cultures, defervescence, normalised inflammatory markers, and unrevealing imaging may not exclude CSI; persistent or recurrent chest symptoms after recent PCI should prompt targeted reassessment.
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Authors Shota Hirai, Goro Fujiki, Atsushi Nakagawa, Taichi Okabe
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Journal European Heart Journal - Case Reports
Year 2026
DOI
10.1093/ehjcr/ytag671
URL
https://doi.org/10.1093/ehjcr/ytag671
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