Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left pectoral pacemaker is unchanged in position , with leads terminating in the right atrium and right ventricle . Sternotomy wires and an aortic valve prosthesis are constant . There is a persistent fracture of the most superior sternotomy wire . The lungs are clear . There is no pleural effusion , pneumothorax or focal airspace consolidation . Heart is top normal in size . The mediastinal and hilar structures are unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process .