FINDINGS:
Compared to the prior film, the cardiomediastinal silhouette is unchanged.
 Sternotomy wires and 2 prosthetic valves again noted. The degree of
 retrocardiac density is not significantly changed and, as before, is
 consistent with left lower lobe collapse and/or consolidation. The possibility
 of a small left pleural effusion cannot be excluded.  Elsewhere, the lungs are
 clear, without CHF or right-sided infiltrate. Equivocal trace right pleural
 effusion.

IMPRESSION:
As above