Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest show a left pectoral dual - lead pacemaker with leads terminating in the right atrium and right ventricle . The course of the leads is unremarkable without evidence of complications and no appreciable pneumothorax . Small bilateral pleural effusions with associated bibasilar atelectasis are present on the left greater than the right . No focal consolidation is seen . The pulmonary vasculature is not engorged . The cardiac silhouette is top normal in size . The mediastinal and hilar contours are within normal limits . The patient is status post median sternotomy and mitral valve replacement with intact sternotomy wires .
    OUTPUT:
    
1 . Left pectoral pacemaker / defibrillator with two leads terminating in the right atrium and right ventricle . 2 . Small bilateral pleural effusions and bibasilar atelectasis on the left greater than the right . 3 . Borderline cardiomegaly .