Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP semi-upright chest radiograph was provided . A dual - chamber left chest wall pacemaker is present with leads in the right atrium and right ventricle . Lung volumes are low but there is no focal consolidation , pleural effusion or pneumothorax . The heart is enlarged . The bones are intact .
    OUTPUT:
    
1 . Dual chamber pacemaker with leads in the right atrium and right ventricle . 2 . Low lung volumes and cardiomegaly .