Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left - sided pacemaker with leads terminating in the right atrium and right ventricle is in appropriate position . The patient is status post median sternotomy . Increased interstitial markings as well as cephalization of the vessels is consistent with mild pulmonary edema . The amount of edema seems to be somewhat asymmetric , right greater than left . There may also be a small right pleural effusion . There is no evidence of pneumonia . Heart size is mildly enlarged .
    OUTPUT:
    
Mild pulmonary edema without evidence of pneumonia .