Presence of air or gas in the space between the heart and the PERICARDIUM. The degree of respiratory distress depends on the amount of trapped air and circulation blocked in the systemic and pulmonary veins.

Presence of air in the mediastinal tissues due to leakage of air from the tracheobronchial tree, usually as a result of trauma.

General or unspecified injuries to the chest area.

Presence of air or gas in the subcutaneous tissues of the body.

Pathological or accidental introduction of air into the retroperitoneal space.

An accumulation of air or gas in the PLEURAL CAVITY, which may occur spontaneously or as a result of trauma or a pathological process. The gas may also be introduced deliberately during PNEUMOTHORAX, ARTIFICIAL.

Injuries caused by impact with a blunt object where there is no penetration of the skin.

Compression of the heart by accumulated fluid (PERICARDIAL EFFUSION) or blood (HEMOPERICARDIUM) in the PERICARDIUM surrounding the heart. The affected cardiac functions and CARDIAC OUTPUT can range from minimal to total hemodynamic collapse.

X-ray visualization of the chest and organs of the thoracic cavity. It is not restricted to visualization of the lungs.