Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A pacemaker projecting over the left axilla is re-demonstrated . Two right ventricular , one right atrial and one left coronary sinus leads are unchanged in position compared with prior exam . Sternotomy wires are intact . Surgical clips are noted within the mediastinum compatible with prior CABG . Lung volumes are low , accounting for bronchovascular crowding . There is prominence of interstitial markings , but no focal parenchymal opacities . The heart size is moderately to severely enlarged . The aorta is tortuous . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
1 . Mild pulmonary vascular congestion . 2 . Pacemaker leads in unchanged location compared with prior exam .