Complications

Depending on how quickly pericardial effusion develops, the pericardium can stretch somewhat to accommodate the excess fluid. However, too much fluid causes the pericardium to put pressure on the heart, which prevents the chambers from filling completely.

This condition, called tamponade (tam-pon-AYD), results in poor blood flow and a lack of oxygen to the body. Tamponade is life-threatening and requires emergency care.