The pericardium is a membrane layer, or sac, that borders your heart. Troubles with the pericardium include: Pericarditis, an inflammation of the cavity. Pericardial effusion, the build-up of liquid in the cavity; Cardiac tamponade, a severe issue in which accumulation of fluid in the sac causes troubles with the function of the heart. Symptoms of pericardial troubles include breast pain, quick heart beat, and trouble breathing. Fever is a common symptom of intense pericarditis. Your doctor might use a physical examination, imaging tests, and heart tests to make a diagnosis.
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