Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate to severe cardiomegaly is again noted . The aortic knob is calcified . Mediastinal and hilar contours are unremarkable . Although there is mild elevation of central venous pressures , no overt pulmonary edema is present . Hazy opacity within the left lower lobe likely reflects atelectasis . There is no pleural effusion or pneumothorax . No acute osseous abnormalities are detected .
    OUTPUT:
    
Mildly elevated central venous pressures in the setting of moderate to severe cardiomegaly , but without overt pulmonary edema .