Nomenclature: Pericarditis with known or clinically suspected concomitant myocardial involvement should be referred to as ‘myopericarditis’, while predominant myocarditis with pericardial involvement should be referred to as ‘perimyocarditis’, according to Task Force consensus.
The diagnosis of predominant pericarditis with myocardial involvement, or ‘myopericarditis’, can be clinically established if patients with definite criteria for acute pericarditis show elevated biomarkers of myocardial injury (troponin I or T, CK-MB fraction) without newly developed focal or diffuse impairment of left ventricular function in echocardiography or CMR.
Think perimyocarditis if evidence of new-onset focal or diffuse reduction of left ventricular function in patients with elevated myocardial biomarkers and clinical criteria for acute pericarditis