A 39-year-old man with known mitral regurgitation (MR) presented with chest pain, nausea and dizziness. Troponin of 5801 ng/L and scooped ST segments indicated myopericarditis. Cardiac MRI demonstrated an epicardial late gadolinium enhancement pattern consistent with a significantly myocarditic syndrome. Initially afebrile, the patient reported fevers a week earlier when abroad where he received amoxicillin.
The patient then began spiking temperatures and infective endocarditis (IE) was confirmed following blood cultures positive for Streptococcus sanguinis and Transoesophageal echocardiography (TOE) showing a vegetation on the anterior mitral valve leaflet. Patient underwent 6 weeks of intravenous benzylpenicillin and on resolution he was discharged to await valve surgery.
A model is proposed where septic embolism from IE caused bacterial myopericarditis, triggering the initial presenting complaint. It is suggested that prior antibiotic therapy and paracetamol suppressed the systemic symptoms of IE.
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