Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Prosthetic aortic valve is in place . Median sternotomy wires appear intact . Moderate cardiomegaly is unchanged . The mediastinal and hilar contours are stable . There is no pleural effusion or pneumothorax . The lung volumes are slightly low but there is no focal airspace opacity to suggest pneumonia . There is no frank pulmonary edema .
    OUTPUT:
    
Stable moderate cardiomegaly without frank pulmonary edema and no evidence of pneumonia .