Myocarditis is an inflammation of the heart that can affect its electrical system and muscle, reducing its ability to pump blood. This can potentially cause a rapid heart rhythm, or arrhythmia.\nMyocarditis can result from illnesses such as lupus, and it can cause other health complications.\nThat\u2019s why it\u2019s important to understand what causes myocarditis and how it can be treated.\nContact the UPMC Heart and Vascular Institute to schedule an appointment.\nWhat Is Myocarditis?\nMany symptoms of myocarditis are similar to those of other illnesses, although you may experience no symptoms. In mild cases, subtle symptoms include slight chest pain or shortness of breath. In advanced stages, symptoms of myocarditis may include:\n\nStabbing and\/or tightness of the chest, which can spread across the body\nShortness of breath\nDifficulty breathing while at rest\nFlu-like symptoms including headache, body aches, joint pain, fever, sore throat, and diarrhea\nSwelling of the legs, ankles, feet, or other body parts\n\nWhat Causes Myocarditis?\nMyocarditis can result from a variety of conditions, including viral infections like Lyme disease or rheumatic fever, autoimmune diseases, environmental toxins, and even negative reactions to medications. Myocarditis also can develop at the same time as pericarditis, an inflammation of the lining of the heart.\nDiagnosing and Treating Myocarditis\nTo diagnose myocarditis, your cardiologist will first review your medical history and check you for symptoms. Additional testing can include an echocardiogram, electrocardiogram, and chest x-ray, as well as blood tests.\nTreatments for myocarditis vary based on its severity and cause. Your doctor will likely advise you to rest at home and avoid strenuous activity until your symptoms lessen. Advanced myocarditis, which can lead to heart failure or cardiac arrhythmia, may require more aggressive treatment such as:\n\nOxygen\nMedicines to treat or prevent cardiac arrhythmias\nA pacemaker\nMedicines to treat heart failure\nNSAIDS (nonsteroidal anti-inflammatory drug) to relieve pain\nAnticoagulants to prevent blood clots\nAntibiotics to treat bacterial myocarditis\nMedicines to treat autoimmune diseases\n\nFor severe cases, the most aggressive treatments can include:\n\nIV medications\nVentricular assist devices\nIntra-aortic balloon pumps\nExtra-corporeal membrane oxygenation\nTransplantation (in extreme cases)\n\nMyocarditis may resolve on its own with rest.\nYour cardiologist will pay close attention for signs of heart failure or arrhythmias and will recommend a course of action if they should occur. Regardless of the severity of your myocarditis, your cardiologist will likely to continue monitor your condition. If you are concerned that you may have myocarditis or would like more information about what causes myocarditis, contact the UPMC Heart and Vascular Institute to schedule an appointment.