Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Transvenous pacing wires are unchanged in position ending in the right atrium and right ventricle . The patient has had an aortic valve replacement . Cardiomediastinal silhouette is stable . Mild aortic tortuosity is also unchanged . There is no pleural effusion or pneumothorax . There is no focal lung consolidation .
    OUTPUT:
    
No evidence of pneumonia .