FINDINGS:
The patient is status post median sternotomy.  A left chest wall AICD device
 is demonstrated with leads terminating in the right atrium and right
 ventricle, as before.  An abandoned lead is the identified over the right
 superior hemi thorax unchanged in position.
 
 The cardiac silhouette is mildly enlarged but stable in size from .  The
 pulmonary vasculature is prominent however there is no evidence pulmonary
 edema.  Lung volumes are low. There is slightly increased opacity at the base
 of the left lung which may represent atelectasis or infection in the
 appropriate clinical setting.  There is no pleural effusion or pneumothorax.

IMPRESSION:
1. Subtle opacity at the base of the left lung likely represents atelectasis. 
 Mild prominence of the pulmonary vasculature without frank pulmonary edema.