<prompt> To differentiate restrictive cardiomypathy and constrictive pericarditis, features ouring constrictive pericarditis are-Diastolic pressures are not equalisedThere is mild pericardial effusionAssociated with septal hyperophyThick pericardium is present  <response>: Ref: Harrisons 19th E pg 1573 Table 288-2. Thickened pericardium seen in constrictive pericarditis. Because constrictive pericarditis can be corrected surgically, it is impoant to distinguish chronic constrictive pericarditis from restrictive cardiomyopathy, which has a similar physiologic abnormality i.e., restriction of ventricular filling. 