Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided pacer device is re - demonstrated with leads terminating in unchanged positions in the right atrium and right ventricle . Severe cardiomegaly is unchanged . The aorta remains tortuous with atherosclerotic calcifications at the knob . Mediastinal and hilar contours are similar . Lungs appear hyperinflated . Linear opacities in the lung bases likely reflect areas of scarring and atelectasis . No focal consolidation , pleural effusion or pneumothorax is detected .
    OUTPUT:
    
No acute cardiopulmonary abnormality .