Acute rheumatic myocarditis

**Definition:** Acute rheumatic myocarditis is cardiac inflammation associated with acute rheumatic fever triggered by an autoimmune reaction to group A streptococci infection resulting in pancarditis involving inflammation of the myocardium, endocardium, and epicardium, usually with left-sided valvar involvement.

**Long definition:** Myocarditis is an inflammatory disease of the myocardium in acute rheumatic fever which recognized clinically. Unexplained congestive heart failure or cardiomegaly, almost always associated with valvular involvement