Prognosis of Acute myocarditis:
It is excellent for adult patients with mild acute lymphocytic myocarditis with preserved LV function.
Presentation with heart failure and LVEF < 45% carries a bad prognosis, with mortality of 50% at 4 years.
NYHA class, immunohistological signs of inflammation, and lack of beta-blocker therapy, have been related to poor outcome within the next 5 years.
Recently, the presence of late gadolinium enhancement on cardiac MRI was found to be the best independent predictor of mortality in biopsy-proven viral myocarditis.
