Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Pacer / ICD leads are unchanged in position . Cardiomediastinal silhouette is stable . Pulmonary vascular engorgement is similar to the prior examination . Patchy opacification of the right lower lung , increased , likely represents atelectasis ; however , infection can not be excluded . A moderate size left pleural effusion is larger in the interval , and there is a trace right pleural effusion .
    OUTPUT:
    
1 . Increased moderate left pleural effusion and trace right pleural effusion . 2 . Increased opacity at the right base likely represents atelectasis however superimposed infection can not be excluded .