Right atrial pressure tracings before (top panel) and after (bottom panel) saline loading in a patient with occult constrictive pericarditis. The previously normal right atrial pressure developed the characteristics of constrictive pericarditis (with equalization of pressures after fluid challenge).
Redrawn from: Bush CA, Stang JM, Wooley CF, Kilman JW. Circulation 1977; 56:924.
