IMPRESSION:
Subsegmental atelectasis is a new 0, exaggerating heart size, although
 increase mediastinal caliber suggests increased intravascular volume or
 pressure.  There is no pulmonary edema or pleural effusion.  Nasogastric tube
 is barely visible, but appears to extend at least as far as the
 gastroesophageal junction. Upper abdominal radiograph would be necessary for
 localization.