Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild pulmonary vascular congestion has increased compared with the prior study with new Kerley B lines consistent mild pulmonary edema . 6 intact median sternotomy wires and an aortic valve prosthesis are unchanged . There is no focal consolidation , pleural effusion , or pneumothorax . The cardiomediastinal silhouette , including mild cardiomegaly , is unchanged .
    OUTPUT:
    
1 . Slightly increased pulmonary vascular congestion with new mild pulmonary edema . 2 . Stable mild cardiomegaly .