Constrictive Pericarditis Calcified

A 45-year-old male with a history of pulmonary tuberculosis treated six years ago now presents with progressive abdominal swelling, bilateral leg edema, and exertional dyspnea. On examination, he has markedly elevated jugular venous pressure with a rapid Y-descent and Kussmaul sign. Chest X-ray shows a curvilinear rim of pericardial calcification. Echocardiography reveals a thickened pericardium greater than 4 mm with septal bounce and respiratory variation of mitral and tricuspid inflow greater than 25%. The structure marked **A** in the diagram is responsible for the pathophysiology of his condition. Which of the following best describes the hemodynamic consequence of this structure's pathology?