Myocarditis is usually suspected based on an exam and blood tests. Imaging tests can help confirm myocarditis and the extent of the inflammation. These may include:
A chest X-ray to show pictures of the heart, lungs, airways, and bones. It can show any areas of swelling in the heart.
Blood tests can also help diagnose myocarditis. These may include tests to check for:
A biopsy to take a piece of tissue from the heart and examine it is the most accurate way to detect myocarditis. Because there are risks associated with this procedure, it is usually reserved for patients in whom a diagnosis using the heart tissue itself would help to define the best treatment approach. The risks and benefits should be discussed as part of the decision-making process.