disease arises from feature disease has basis in feature Autoimmunity myocarditis autoimmune myocarditis https://www.malacards.org/card/autoimmune_myocarditis MEDGEN:299070 Autoimmune myocarditis is an autoimmune disease that affects the heart. The condition is characterized by inflammation of the heart muscle (myocardium). Some people with autoimmune myocarditis have no noticeable symptoms of the condition. When present, signs and symptoms may include chest pain, abnormal heartbeat, shortness of breath, fatigue, signs of infection (i.e. fever, headache, sore throat, diarrhea), and leg swelling. The exact underlying cause of the condition is currently unknown; however, autoimmune conditions, in general, occur when the immune system mistakenly attacks healthy tissue. Treatment is based on the signs and symptoms present in each person. In some cases, medications that suppress the immune system may be recommended. MONDO:0022519 UMLS:C1608389 GARD:0009519 DOID:0080767 autoimmune cardiomyopathy