What usually causes myocarditis?

Myocarditis 00:21 min watch Published 16 April 2026 Dr Ravi Assomull, Consultant Cardiologist

Myocarditis is most commonly triggered by viral infections, though autoimmune causes are also possible. In this video, Dr Ravi Assomull, a Private Cardiologist in London, explains the underlying causes and how they affect the heart.

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Transcript

By far and away the most common cause of myocarditis is a viral infection, typically following a flu-like illness. It can also be related to autoimmune conditions and very rarely we have seen myocarditis following vaccinations.

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