Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Sternotomy . Cardiac defibrillator . Increased heart size , similar . Small left pleural effusion is similar . Interstitial prominence has improved since prior . Borderline pulmonary vascularity . No right pleural effusion . No infiltrates . No pneumothorax .
    OUTPUT:
    
Cardiac enlargement , with small left pleural effusion , similar .