Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . Patient is post - AVR with aortic valve in the appropriate position . Sternotomy wires are appropriately positioned . Moderate to severe cardiomegaly with unchanged mild interstitial pulmonary edema . Right lower lobe opacity is minimally increased . There is trace fluid in the minor fissure . No pleural effusion . No pneumothorax .
    OUTPUT:
    
1 . Minimally increased right lower lobe opacity , either representing aspiration or pneumonia . 2 . Cardiomegaly with unchanged mild interstitial edema .