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Figure 1 LV and RV High-Fidelity Manometer Pressure Traces From 2 Patients During Expiration and Inspiration

Note that both patients have early rapid filling and elevation and end-equalization of the left ventricular (LV) and right ventricular (RV) pressures at end expiration. (A) A patient with surgically documented constrictive pericarditis. During inspiration there is an increase in the area of the RV pressure curve (orange shaded area) compared with expiration. The area of the LV pressure curve (yellow shaded area) decreases during inspiration as compared with expiration. (B) A patient with restrictive myocardial disease documented by endomyocardial biopsy. During inspiration there is a decrease in the area of the RV pressure curve (orange shaded area) as compared with expiration. The area of the LV pressure curve (yellow shaded area) is unchanged during inspiration as compared with expiration.