Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly , unchanged compared to the prior study . A single lead pacer is unchanged in appearance . No consolidation , pneumothorax or pleural effusion seen . Previous median sternotomy noted . Visualized bony structures are otherwise unremarkable in appearance .
    OUTPUT:
    
No acute cardiopulmonary process seen .