Definition of endocardium in US English:

endocardium

noun

  • The thin, smooth membrane which lines the inside of the chambers of the heart and forms the surface of the valves.

    • ‘Only rarely does it involve the endocardium or cardiac valves.’
    • ‘The endocardium showed prominent endocardial fibroelastosis, particularly in sections obtained from the right side of the heart.’
    • ‘To clearly define the beam position, contrast agent may help identify the endocardium by attenuating the x-ray beam in the cavity.’
    • ‘The immune system usually kills these organisms, but sometimes they survive and affect the heart valve or another section of the endocardium.’
    • ‘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.’
    • ‘The pericardium, cardiac valves, endocardium, and coronary arteries were normal.’
    • ‘It is characterized by the growth of a thick meshwork of fibrous tissues within the endocardium and heart valves.’
    • ‘These modified cardiac fibers lie beneath the endocardium.’
    • ‘In this case, the diffraction became very weak when the beam moved from the endocardial surface into the left ventricle cavity, making it easier to identify the position of the endocardium.’

Origin

Late 19th century: modern Latin, from endo- ‘within’ + Greek kardia ‘heart’.

Pronunciation

endocardium

/ˌendōˈkärdēəm//ˌɛndoʊˈkɑrdiəm/