Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The mediastinal clips , sternotomy wires and an aortic valve prosthesis are constant . Again , there is an increase in interstitial markings which may reflect underlying mild pulmonary edema or chronic lung disease . The heart size is mildly enlarged but unchanged . The aorta is calcified and tortuous . There is no pleural effusion , pneumothorax or focal airspace consolidation worrisome for pneumonia .
    OUTPUT:
    
Increase in interstitial markings which may reflect underlying mild pulmonary edema or chronic lung disease .