FINDINGS:
The lungs are moderately well inflated.  There is a new subtle right lower
 lobe opacity is noted.  No pulmonary edema.  No pleural effusion or
 pneumothorax.  The heart is top-normal in size, unchanged since prior
 examination.  Mediastinal contour and hila are unremarkable.
 
 Intact median sternotomy wires and mitral valve prosthesis are noted.  A left
 anterior chest wall pacer device lead tips are in the right atrium and right
 ventricle.

IMPRESSION:
New subtle right lower lobe opacity.  Differential diagnosis includes
 atelectasis, early pneumonia or aspiration pneumonia; clinical correlation
 recommended.