Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a single - lead pacemaker device terminating in the right ventricle . The heart is mild to moderately enlarged with a left ventricular configuration , as before . The cardiac , mediastinal contours appear stable . The lung volumes are low . Patchy opacities at the lung bases are most consistent with minor atelectasis . There is a mildly prominent appearance of upper zone redistribution of pulmonary vasculature with instinct contours and peribronchial cuffing suggesting mild vascular congestion including ___ B lines at the lung bases . There is no definite pleural effusion or pneumothorax . Surgical clips project over the left upper quadrant .
    OUTPUT:
    
Findings suggesting mild vascular congestion .