Constrictive pericarditis.

Constrictive pericarditis is a complex disorder characterized by abnormal thickening of the pericardium that leads to pathologic changes in cardiac hemodynamic data. The disorder can be suspected by history and physical findings. Data from echocardiography, CT, and MRI offer diagnostic information. The diagnosis cannot generally be established with certainty by noninvasive methods. Additional information from cardiac catheterization may help confirm the diagnosis. Together, these diagnostic modalities aid in the assessment of disease and help to differentiate it from related conditions such as restriction, cardiac tamponade, and right ventricular infarction. Treatment is largely surgical, and new techniques and approaches have made it relatively safe. Early diagnosis and pericardiectomy may lead to cure in most patients.