Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single - lead pacemaker device has a lead terminating in the right ventricle , as before . The cardiac , mediastinal and hilar contours appear stable . There is no pleural effusion or pneumothorax . Mild perihilar congestion is noted , but otherwise , the lungs appear clear .
    OUTPUT:
    
Findings suggest mild vascular congestion .