Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable single frontal chest radiograph was obtained . A right IJ terminates in the upper SVC . The new Core Valve projects over previous bioprosthetic aortic valve . Lung volumes are low . The heart is moderately enlarged . There is no pulmonary edema , pleural effusion , or pneumothorax . A large hiatal hernia is again noted .
    OUTPUT:
    
Moderate cardiomegaly without pulmonary edema .