Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Sternotomy wires and prosthetic valve are unchanged . The heart size is large , but less so than prior exam dated ___ . The lungs demonstrate no lobar consolidation . Subtle prominence of the interstitium is present , although there is not overt sign of failure . Trace blunting of the costophrenic angles posteriorly suggests trace pleural fluid .
    OUTPUT:
    
Cardiomegaly with mild pulmonary congestion and trace bilateral pleural effusions ; improved since ___ .