Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left - sided cardiac AICD is partially imaged . The patient has had prior median sternotomy with valve replacement . A tracheostomy tube remains in place . A right - sided PICC line terminates in the low SVC . Lung volumes are low , and there is no appreciable change in left lung airspace opacities most likely corresponding to pulmonary edema . Left basilar is retrocardiac airspace opacification is most likely due to stable left lower lobe subsegmental atelectasis . Right lower lobe collapse is unchanged . Moderate cardiomegaly despite the projection is unchanged . A small layering left pleural effusion is unchanged .
    OUTPUT:
    
No significant interval change in mild pulmonary edema , left basilar subsegmental atelectasis , right lower lobe collapse and a small layering left pleural effusion . Stable moderate cardiomegaly .