Carditis (pl. carditides) is the inflammation of the heart. It is usually studied and treated by specifying it as: Pericarditis is the inflammation of the pericardium Myocarditis is the inflammation of the heart muscle Endocarditis is the inflammation of the endocardium Pancarditis, also called perimyoendocarditis, is the inflammation of the entire heart: the pericardium, the myocardium and the endocardium Reflux carditis refers to a possible outcome of esophageal reflux (also known as GERD), and involves inflammation of the esophagus/stomach mucosa.