Intrapericardial Cyst Formation in Constrictive Pericarditis Simulating Tricuspid Stenosis

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Abstract
Two cases of constrictive pericarditis with intrapericardial cyst formation are presented. In each, a tricuspid diastolic murmur was present, and confirmation of a tricuspid valve gradient was obtained at cardiac catheterization. Angiographic studies revealed that the tricuspid valves were distorted by the cysts. In both patients, surgical excision was successfully achieved. In case 1 a blood-containing cyst was found, the etiology of which is obscure. Case 2 was associated with rheumatoid arthritis, and the compression resulted from a chronic abscess that probably arose at a previous pericardiectomy.