Definition of epicardium in English:



mass nounAnatomy
  • A serous membrane that forms the innermost layer of the pericardium, attached to the muscles of the wall of the heart.

    • ‘Reference to the pericardium, epicardium, myocardium, endocardium and valves, chordae, ventricular thicknesses, and aorta and major vessels may be included.’
    • ‘The difference in the spacings in the top epicardium layer and the rest of the heart may indicate that sarcomere lengths in those regions are different.’
    • ‘An echocardiogram showed that the tip of the pacemaker catheter extended through the right ventricular apical wall of the epicardium.’
    • ‘It has been known that muscle fibers in a heart are arranged in such a way that their orientation changes continuously from endocardium to epicardium of the free wall.’
    • ‘Affected regions are characterized by a lacelike pattern of adipose infiltration, progressing from epicardium toward the endocardium, and by interposed streams of normal or slightly atrophie myocytes.’


Mid 19th century: from epi- ‘above’ + Greek kardia ‘heart’, on the pattern of pericardium.