How is myocarditis diagnosed?

Myocarditis encompasses several types. Based on disease course, it can be classified as either chronic or acute; based on etiology, it may be viral or bacterial. So how is myocarditis diagnosed?

How Is Myocarditis Diagnosed?

Diagnosis of myocarditis typically relies on a combination of factors: characteristic etiological features, clinical symptoms and signs related to cardiac involvement, abnormal electrocardiogram (ECG) findings, elevated cardiac biomarkers indicative of myocardial necrosis, abnormalities detected on echocardiography, and the exclusion of other cardiac diseases. Definitive diagnosis requires histopathological evidence—primarily obtained via endomyocardial biopsy. However, due to its limited therapeutic guidance value and associated procedural risks, endomyocardial biopsy is not routinely performed in current clinical practice. In many cases, diagnosing myocarditis remains challenging—for instance, when viral infection is clinically subtle or when myocardial necrosis biomarkers remain within normal limits—even in the presence of overt cardiac impairment such as heart failure or arrhythmias.

Since viral infection is the predominant cause of myocarditis, antiviral therapy forms the cornerstone of treatment. During antiviral treatment, immunomodulatory agents that regulate cellular immune function should be administered concurrently. Additionally, adjunctive therapies—including agents that promote myocardial repair and improve myocardial nutrition and metabolism—may be used to enhance recovery from myocarditis.

Please follow your physician’s recommendations and maintain a healthy lifestyle and positive mindset. Seek prompt medical attention if any of the aforementioned symptoms appear suddenly or worsen significantly. We hope this information has been helpful to you.