The pericardium is a membrane like a sac that surrounds the heart and its major blood vessels. Normally there is a small amount of fluid between the pericardium and the heart that helps cushion the heart and reduces friction between the heart and the pericardium when the heart beats.

Current as of: February 20, 2015

Author: Healthwise Staff

Medical Review: Rakesh K. Pai, MD, FACC - Cardiology, Electrophysiology & Stephen Fort, MD, MRCP, FRCPC - Interventional Cardiology