Diagnosis of Myocarditis
The diagnosis of myocarditis as per the European Society of Cardiology Working Group on Myocardial and Pericardial Diseases, requires fulfillment of ≥1 clinical presentation and ≥1 diagnostic criteria. These criteria have to be fulfilled in the absence of coronary artery disease as detected by coronary angiography, and absence of pre-existing cardiovascular disorder that can otherwise explain the presentation(9). All studies included in the meta-analysis made a clinical diagnosis of myocarditis that fulfilled international criteria as per European Society of Working Group on Myocardial and Pericardial diseases. Whilst the majority of studies used CMR diagnostic criteria (non-ischemic late gadolinium enhancement and/or Lake Louise Criteria) (10) , others used echocardiography and/or endo-myocardial biopsy for diagnosis.