Constrictive pericarditis associated with patch electrodes of the automatic implantable cardioverter-defibrillator.

A case of constrictive pericarditis intimately involving patch electrodes of the automatic implantable cardioverter-defibrillator is described. Typical clinical and hemodynamic findings for constrictive pericarditis were noted 15 months after lead installation. Additionally, chest x-ray examination revealed a severe crumpling deformity of the patch electrodes. Thoracotomy was performed and revealed marked fibrous reaction surrounding both surfaces of each patch electrode. Histologic examination revealed fibrous tissue with multinucleated giant cells, consistent with a foreign body reaction. The patient had complete resolution of signs and symptoms of constrictive pericarditis after removal of the patch electrodes and pericardial stripping. Constrictive pericarditis from implanted patch electrodes appears to be an uncommon complication of the automatic implantable cardioverter-defibrillator and should be considered in patients with one or more patch electrodes and other signs of constrictive pericarditis.