Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided dual - chamber pacemaker device is noted with leads terminating in the right atrium and right ventricle . Mild enlargement of the cardiac silhouette is noted . Mediastinal and hilar contours are grossly unremarkable . Pulmonary vasculature is not engorged . There may be minimal atelectasis in the left lung base without focal consolidation . No pleural effusion or pneumothorax is identified . No acute osseous abnormality is detected . Degenerative changes of the left glenohumeral joint are incompletely assessed .
    OUTPUT:
    
No acute cardiopulmonary abnormality .