endocardial cushions

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Related to endocardial cushions: endocardial cushion defect


1. situated or occurring within the heart.
2. pertaining to the endocardium.
endocardial cushions elevations on the atrioventricular canal of the embryonic heart that later help form the interatrial septum.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

a·tri·o·ven·tric·u·lar ca·nal cush·ions

a pair of mounds of embryonic connective tissue covered by endothelium, bulging into the embryonic atrioventricular canal; one located dorsally and one ventrally; they grow together and fuse with each other and with the lower edge of the septum primum, dividing the originally single canal into right and left atrioventricular orifices.
Farlex Partner Medical Dictionary © Farlex 2012
References in periodicals archive ?
Mandarim-de-Lacerda, "Human cardiac development: total volumetric increase of the heart, ventricular myocardium and endocardial cushions during the embryonic period," Arquivos Brasileiros de Cardiologia, vol.
These cells not only produce many of the morphogens that will lead to the epithelial-mesenchymal-transition in the endocardial cushions, but also produce many of the matrix components that the mesenchymal cells will utilize as a migratory substratum.
The middle portion of the heart -- the atrioventricular valves and related area -- is formed by the endocardial cushions. The cushions consist of two mounds of tissue that grow inward until they fuse to form two separate valves.