Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral chest radiographs were obtained . The lungs appear well expanded and clear without pleural effusion or pneumothorax . No overt edema is seen . The heart is stably and severely enlarged with unchanged tortuous aortic contour . The width of the mediastinum appears grossly unchanged from prior AP chest radiograph . Right neck plastic cannula is presumed to be for IV access .
    OUTPUT:
    
Stable cardiomegaly without acute process .