Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A pacemaker projects over the left chest wall with lead tips in the right atrium and right ventricle , unchanged since prior examination . The lungs are mildly hypoinflated with persistent moderate right and small left pleural effusions bibasilar opacities . Mild vascular congestion noted . No pneumothorax . Heart is partially obscured due to overlying parenchymal disease . Aortic arch calcifications noted . Mediastinal contour and hila are unremarkable .
    OUTPUT:
    
1 . Mild vascular congestion . 2 . Stable moderate right and small left pleural effusion . 3 . Right lower lobe opacity likely represents combination of pleural effusion and atelectasis however superimposed infection can not be excluded . 4 . Left lower lobe atelectasis .