Pericardium.

A double-layered sac that surrounds and protects the heart, containing a small amount of lubricating fluid. Inflammation (pericarditis) or fluid accumulation (pericardial effusion) in this space can impair heart function.

What is pericardium?

A double-layered sac that surrounds and protects the heart, containing a small amount of lubricating fluid. Inflammation (pericarditis) or fluid accumulation (pericardial effusion) in this space can impair heart function.

Related glossary terms.

Have questions about pericardium?

Our Heart Team provides expert second opinions with plain-language explanations. 24-hour turnaround.