Define myocarditis.

Hint: Heart muscles made up of three layers endocardium (inner lining), myocardium (heart muscle) and epicardium (outer surface). Inflammation in myocardium leads to disorders in heart muscles called myocarditis. Manifestations of myocarditis range from asymptomatic or nonspecific generalized illness to acute cardiogenic shock and sudden death.

Complete answer:-
To answer this question you must know about heart disease.
Heart muscles consist of three layers of muscle called endocardium, myocardium and epicardium. Infection in these muscles leads to certain disorders such as Myocarditis is the acute or chronic inflammation of the myocardium. Myocarditis can affect your heart muscles and your heart’s electrical system, reducing the ability to pump and causing rapid or abnormal heart rhythms.

A viral infection usually causes myocarditis,but it can result from a reaction to drugs or be part of a more general inflammatory condition. Signs and symptoms of myocarditis include chest pain, fatigue, shortness of breath etc. When children develop myocarditis, they might have symptoms including: fever, fainting, breathing difficulties, rapid abnormal heart rhythms. To diagnose the myocarditis techniques used such as ECG, X –rays, MRI and endomyocardial biopsy.

Therefore myocarditis is defined as the inflammation of heart muscles (myocardium) leading to damage or destruction of heart muscles.

Note:-
Myocarditis sometimes occurs if a person is exposed to certain things such as chemical and radiation, medications or illegal drugs that might cause an allergic or toxic reaction. Complication of myocarditis includes heart failure,heart attack or stroke and sudden cardiac death at severe damage of heart muscles. There is not any specific prevention but one can take these steps to prevent myocarditis : avoid people who have a viral or flu- like illness until they recover, follow good hygiene,avoid risky behaviors and most important get vaccinated.