Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compare to ___ , cardiomegaly has increased and the mediastinum has enlarged . Pulmonary vasculature is engorged without significant pulmonary edema . These findings may be due to volume overload or pericardial effusion . There is increased bilateral basal atelectasis and minimal bilateral pleural effusion , if any .
    OUTPUT:
    
Cardiomediastinal silhouette widening , possibly due to increased intravascular pressure / volume or pericardial effusion .