Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A pacemaker generator and leads are in unchanged position . Median sternotomy wires appear intact . Mild central pulmonary vascular congestion is chronic and similar to prior examination . No overt interstitial edema is evident . There is no pleural effusion . No confluent consolidation is identified . There is no pneumothorax . Mediastinal and hilar contours are within normal limits . Moderate cardiomegaly is unchanged . A probable stent is seen within the expected location of the LAD .
    OUTPUT:
    
No significant interval change .