Constrictive pericarditis
The diagnosis of constrictive pericarditis (CP) generally requires both the demonstration of an appropriate physiology and evidence of pericardial thickening. Differential diagnosis in pericardial disease remains difficult and challenging to the clinician. The pathophysiologic characteristics of the various pericardial syndromes can be studied with different imaging modalities, but it is crucial to register morphology, function and flow during the different phases of the respiratory cycle. When a discrepancy exists between clinical findings and hemodynamic evaluation with imaging, multiple modalities should be combined and, if a very low or very high atrial pressure is suspected, an intervention to increase or lower this pressure can be required to unmask characteristic findings during respiration with respect to ventricular interdependence.