Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Lung volumes are low , exaggerating the cardiac silhouette , which is mildly enlarged . Cardiomediastinal contours are otherwise stable . Increased hazy opacity at the right lung base is compatible with an enlarged right pleural effusion , now moderate in size . Adjacent linear opacities are compatible with atelectasis . Prominence of the pulmonary vascular markings is compatible with vascular congestion . The wires of a atrio-biventricular left chest wall pacer terminates in similar position . Sternotomy wires and mediastinal clips are intact .
    OUTPUT:
    
1 . Increased size of a chronic right pleural effusion , now moderate , with adjacent atelectasis . Unless the etiology of this abnormality is known and understood , CT is recommended for further evaluation . 2 . Mildly enlarged cardiac silhouette could represent a pericardial effusion . Findings were communicated via phone call by ___ to ___ on ___ at ___ AM .