Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Patient is post aortic valve replacement , with overlying median sternotomy wires . A right - sided port catheter terminates in the low SVC . Compared with the prior radiograph , there are mildly increased interstitial lung markings , which is likely due to crowding of the bronchovascular structures . However , there is no pleural effusion , focal consolidation , or pneumothorax . Mild degenerative changes of the thoracic spine are also present .
    OUTPUT:
    
No acute cardiopulmonary process .