Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post coronary artery bypass graft surgery . The heart appears mildly enlarged . The vascular pedicle is widened suggesting fluid overload . Mild central hazy pulmonary vascular prominence suggests slight congestion , but less striking than on the recent prior examination with reduced perihilar fullness . The lungs appear hyperinflated . Streaky left mid lung opacities suggest minor atelectasis .
    OUTPUT:
    
Findings suggesting mild vascular congestion .