Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded , without focal opacities . There is mild vascular upper redistribution . The heart is moderately enlarged , mostly from right ventricular contribution . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Volume overload in the setting of moderate cardiomegaly mostly from right ventricular enlargement .