Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Transvenous right atrial and right ventricular pacer leads appear in standard placement . Cardiomediastinal silhouette remains mildly enlarged but stable . The aorta appears somewhat tortuous with atherosclerotic calcifications . The lungs are clear with no evidence of consolidation , effusion , or pneumothorax . Median sternotomy wires appear aligned and intact . No acute fractures are identified . Mild bilateral acromio-clavicular degenerative changes are noted .
    OUTPUT:
    
No acute cardiopulmonary process . Stable mild cardiomegaly .