<prompt> The epicardium is one of the three layers of the hea. It is:Continuous with the endocardium.Also known as the visceral pericardium.Composed of modified cardiac muscle cells.Capable of increasing intraventricular pressure.  <response>: The pericardium is a fibroserous sac that encloses the hea. The innermost layer of the pericardium, the epicardium, is also known as the visceral pericardium. 