Table 2.

Definition of clinically suspected myocarditis according to the European Society of Cardiology.

Suggestive Clinical Presentation, Defined as at Least One of the Following:

Acute chest pain syndrome Cardiogenic shock New-onset heart failure (<3 months) Chronic heart failure (>3 months)

Diagnostic Criteria, Defined as at Least One of the Following:

New QRS, ST-T abnormalities, new arrhythmias (both brady- and tachy-) Myocardial injury (increased troponin levels) Morpho-functional abnormalities (by echocardiography of cardiac magnetic resonance imaging) Noninvasive tissue characterization criteria by cardiac magnetic resonance imaging (T2-based criteria plus T1-based criteria)

Clinically suspected myocarditis is defined by at least one suggestive clinical presentation plus at least one diagnostic criterion.