Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are relatively low lung volumes . Increased interstitial markings bilaterally suggests mild pulmonary vascular congestion . The cardiac and mediastinal silhouettes are stable with the cardiac silhouette enlarged . No pleural effusion is seen . There is no focal consolidation . Hilar contours are stable . Patient is status post median sternotomy . Evidence of DISH is seen along the thoracic spine .
    OUTPUT:
    
Mild pulmonary vascular congestion . Persistent cardiomegaly .