Diagnosis of Pericarditus

Why should pericarditis be considered a diagnosis of exclusion? Which clinical features are most useful in the diagnosis of pericarditis? What are the most common pitfalls in the ECG interpretation? What are the best ways to differentiate the ECG of pericarditis from that of MI and early repolarization? How is uncomplicated viral pericarditis treated differently compared to pericarditis with other etiologies? Why is it so important to include colchicine as part of the treatment of pericarditis? Which patients with pericarditis require admission? and many more...