Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . Dual lead pacer midline sternotomy wires and aortic valve replacement again noted . Cardiomegaly is re - demonstrated with large retrocardiac hiatal hernia . No focal consolidation concerning for pneumonia . No effusion or pneumothorax . Mediastinal contour stable . Bony structures are intact .
    OUTPUT:
    
Stable cardiomegaly and large hiatal hernia . No pneumonia .