OverviewThe pericardium is a thin double-layered sac which encloses the heart. Fluid is contained within the layers and lubricates the constantly rubbing surfaces.
Update Date 6/2/2014
Updated by: Norman S. Kato, MD, Surgeon with the Cardiac Care Medical Group, Encino, CA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.