Pneumopericardium

**Pneumopericardium** is a formation in which gas accumulates behind the pericardial cavity. This condition is one of the complications of cardiac pathology, in which it is not possible to normalize tissue hypoxia, for example, after surgery. The listed conditions are rare, and their occurrence is due to congestion in the organs of the cardiovascular system, structural abnormalities and pathogenic processes occurring in the pulmonary circulation.