The anterior cross-sectional view of the heart comparing the normal heart anatomy and a heart with myocarditis. Myocarditis is the inflammation of the heart muscle (myocardium of the heart wall). The normal heart anatomy includes the aorta, pulmonary artery, atriums, and the ventricles. The heart with myocarditis shows thickened ventricular walls. Symptoms of myocarditis include chest pain, shortness of breath, and an irregular heart rhythm.
