Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette continues to be enlarged , similar to ___ . A cardiac pacer has its leads in appropriate position overlying the right atrium and ventricle . The lungs are clear without focal consolidation , pleural effusion or pneumothorax . A right VP shunt is seen traversing along the right hemithorax and coiling in the right upper quadrant . The visualized upper abdomen is unremarkable .
    OUTPUT:
    
Stable cardiomegaly without superimposed acute cardiopulmonary process .