The sac that surrounds the heart (composed of the visceral and parietal layers); the pericardium is filled with approximately 30-50 ml. of surfactant fluid – this reduces the surface tension within the sac and allows it to open and close freely with cardiac contraction and relaxation.
1. Six Second ECG GuidebookA Practice Guide to Basic and 12 Lead ECG Interpretation, written by Tracy Barill, 2012 Introduction The ability to correctly interpret an electrocardiogram (ECG), be it a simple six second strip or a 12 lead ECG, is a vital skill... (2012), T Barill, p. 202