Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is moderately enlarged . There appears to be a large hiatal hernia . Mediastinal and hilar contours are grossly unremarkable . Mild upper zone vascular redistribution is seen . Patchy atelectasis is seen in the lung bases . No pleural effusion or pneumothorax identified . No acute osseous abnormality is detected
    OUTPUT:
    
Moderate cardiomegaly with mild pulmonary vascular congestion and bibasilar atelectasis . Large hiatal hernia .