Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low and exaggerate the pulmonary vascular markings . ET tube is in the lower trachea at 3 .2 cm from the carina . Right IJ tip is in the upper SVC . Enteric tube traverses to the stomach . While the heart size is exaggerated due to technique , it is still enlarged . The superior mediastinum also appears prominent . There is enlargement of the pulmonary arteries and azygous vein . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
1 . ET tube in place in the lower trachea . 2 . Lung volumes are extremely low . The heart and pulmonary arteries appear significantly enlarged , raising suspicion for a cardiac etiology .