Thoracic ultrasound in spontaneous pneumomediastinum

Bedside ultrasound images of patient with pneumomediastinum. (A) The subxiphoid view demonstrated normal cardiac contractility, normal chamber size, and lack of pericardial effusion. The parasternal long (B), parasternal short (C), and apical views of the heart were of poor quality with diffuse A lines (D), suggesting air artifact. These findings were suggestive of the presence of a pneumomediastinum.