CTICasesUnilateral Pulmonary Edema
Imaging findings
Chest radiograph in a patient with acute mitral valve insufficiency shows dense, asymmetric consolidation and interstitial edema confined to the right upper lobe, with the left lung appearing completely clear. The consolidation cleared rapidly following mitral valve replacement.
Key takeaways
Mitral regurgitation-induced unilateral pulmonary edema is a classic diagnostic pitfall. The high-velocity regurgitant jet from the mitral valve is directed selectively toward the orifice of the right superior pulmonary vein, driving localized hydrostatic edema. This presents as right-sided or right-upper-lobe-predominant consolidation, mimicking pneumonia, and resolves promptly after valve replacement.
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