Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided pacemaker device is noted with lead terminating in the right ventricle . Moderate cardiomegaly is re - demonstrated . The mediastinal and hilar contours are similar . The pulmonary vasculature is minimally engorged . There are mild patchy opacities in the lung bases likely reflective of atelectasis . A trace left pleural effusion may be present . No pneumothorax is detected . No acute osseous abnormality is visualized .
    OUTPUT:
    
Minimal pulmonary vascular congestion and possible trace left pleural effusion . Mild bibasilar atelectasis .