Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP view of the chest . New compared to priors is dense retrocardiac opacity . There is also a right basilar opacity silhouetting the costophrenic angle . Findings may be due to pleural effusions with underlying atelectasis or infection also possible . Pulmonary vascular markings are indistinct . Cardiac silhouette is slightly enlarged , unchanged given differences in technique and rotation to the left . Left chest wall dual lead pacing device is again noted as well as median sternotomy wires and mediastinal clips .
    OUTPUT:
    
Pulmonary vascular congestion . Left greater than right bibasilar opacities suggesting underlying effusions noting atelectasis or component of infection , particularly on the left is also possible .