Red flags
- Fulminant myocarditis: cardiogenic shock, malignant arrhythmia
- Giant cell/eosinophilic myocarditis
First steps
- ECG, troponin, BNP
- Bedside echo
- Rule out ACS (angiography)
Key investigations
- Cardiac MRI (LGE, T1/T2 mapping)
- Viral serology (Coxsackie, adeno, HIV, HCV, HHV-6)
- Autoimmune screen
Differentials
- STEMI
- Takotsubo
- Sepsis-related cardiomyopathy
Initial management
- Supportive HF therapy — start once stable
- AVOID NSAIDs
- Immunosuppression only for giant cell/eosinophilic biopsy-proven
- Restrict exercise ≥3 months
- MCS/ECMO for fulminant
Referral
- HF specialist
- Cardiac MRI centre
AI clinical assessment
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