Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post sternotomy , aortic valve replacement , and likely coronary artery bypass graft surgery . There is a three - lead pacemaker / ICD device , with leads terminating in the right atrium , right ventricle and coronary sinus , respectively , as before . The heart is mildly enlarged with a left ventricular configuration . The mediastinal and hilar contours appear unchanged . There is a persistent reticulation at the lung bases and a right infrahilar opacity , but unchanged . Fissures are minimally thickened , which could be seen with slight fluid overload . The diaphragms are flattened . There is no pleural effusion or pneumothorax . Mild degenerative changes are present along the spine .
    OUTPUT:
    
Stable appearance of the chest , with no acute findings , including mild predominantly basilar peripheral interstitial abnormality , although not widespread or striking . This may be due to a degree of mild chronic pulmonary congestion among other potential causes .