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Calcific rheumatoid constrictive pericarditis with cardiac failure treated by pericardiectomy.

A 74-year-old man with classic rheumatoid arthritis developed constrictive pericarditis accompanied by gross pericardial calcification. Pericardiectomy was followed by marked clinical improvement, substantiated by hemodynamic data. Immunofluorescent staining of the resected pericardium demonstrated precipitates of IgG, IgM, and complement C3. Similar precipitates were not encountered in normal pericardium or pericarditis due to other etiology.