Snapshot A 26-year-old man presents to his primary care physician due to shortness of breath and mild palpitations. He reports that his symptoms have progressively worsened over the course of a month. His shortness of breath is most apparent with climbing the stairs or low-intensity jogging. Approximately 2 months ago, he experienced an upper respiratory infection. Physical examination is unremarkable. An electrocardiogram demonstrates nonspecific cardiac abnormalities and cardiac biomarkers and chest radiograph are unremarkable. Preparations are made to obtain a cardiac echocardiogram. Introduction Clinical definition login to view 1 more bullet Etiology Infectious login to view 23 more bullets Pathophysiology login to view 2 more bullets Presentation Symptoms/physical exam login to view 8 more bullets Differential Acute coronary syndrome login to view 2 more bullets DIAGNOSIS Making the diagnosis login to view 2 more bullets Treatment Treatment is directed at the underlying cause of myocarditis Complications Dilated cardiomyopathy Heart failure Sudden cardiac death