Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are moderately well inflated with mild vascular congestion . No large pleural effusion . Persistent left lower lobe heterogeneous opacity is noted . No pneumothorax . Stable severe cardiomegaly . Mediastinal contour and hila are unremarkable .
    OUTPUT:
    
1 . Stable mild vascular congestion . 2 . Stable severe cardiomegaly 3 . Persistent heterogeneous left lower lobe opacity is most consistent with atelectasis . Clinical correlation for superimposed infection is recommended .