Management of Absence of Respiratory Variation in PCWP and LV Diastolic Pressure Gradient

Diagnostic Approach

The European Society of Cardiology recommends assessing peak velocity of tricuspid regurgitation jet and left atrial maximum volume index to evaluate patients with suspected pulmonary hypertension 1, 2
Cardiac catheterization with simultaneous right and left heart measurements is indicated when echocardiographic findings are inconclusive or conflict with clinical presentation, as recommended by the American Heart Association 3, 4
Simultaneous pressure measurements in the left ventricle and left atrium via transseptal catheterization provide the most accurate assessment, according to the American College of Cardiology 3
Exercise hemodynamic assessment should be considered when there is discrepancy between resting measurements and clinical symptoms, as suggested by the European Society of Cardiology 3, 4

Diastolic equalization of pressures between right and left heart chambers supports the diagnosis of constrictive pericarditis, as stated by the European Society of Cardiology 5, 6
Characteristic "dip and plateau" or "square root sign" in ventricular pressure tracings is a diagnostic feature of constrictive pericarditis, according to the American Heart Association 5
Thickened pericardium on imaging studies is a key finding in constrictive pericarditis, as recommended by the European Society of Cardiology 5, 6
Absence of ventricular interdependence distinguishes restrictive cardiomyopathy from constrictive pericarditis, as stated by the European Society of Cardiology 1
Elevated pulmonary vascular resistance is a characteristic feature of restrictive cardiomyopathy, according to the American College of Cardiology 7

Assessment of optimal volume status is essential before attributing hemodynamic abnormalities to cardiac dysfunction, as recommended by the Society of Critical Care Medicine 8
Dynamic measures of hemodynamic parameters before and after volume challenge are more reliable than static measurements, according to the European Society of Intensive Care Medicine 8
In patients on mechanical ventilation, positive pressure ventilation affects the relationship between PCWP and LVEDP, as stated by the European Society of Intensive Care Medicine 9
Changes in pleural pressure primarily affect inflow to the right ventricle and outflow from the left ventricle, according to the American Thoracic Society 9