Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Indistinct left heart , medial diaphragmatic border , more prominent since prior , suggest developing infiltrate . Sternotomy . Cardiac pacemaker . Shallow inspiration accentuates heart size . Normal pulmonary vascularity . No pneumothorax . No effusion . Arterial calcification . .
    OUTPUT:
    
Suggestion of left basilar infiltrate .