Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate unchanged small bilateral pleural effusions . The heart size is large , and there has been an interval increase in interstitial markings consistent with mild pulmonary edema . A left - sided pacer / ICD is noted with leads terminating in the right atrium and right ventricle . There is no pneumothorax or consolidation . There are mild degenerative changes within the thoracic spine .
    OUTPUT:
    
Mild pulmonary edema .