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membranous part of interventricular septum


Definition: part of the fibrous skeleton of the heart that is seen as a small, thin, round or oval nonmuscular area at the superior end of the interventricular septum; it lies just below and is continuous with the portion of the fibrous ring of the aortic valve supporting the anterior and posterior cusps and also with the right fibrous trigone; the atrioventricular bundle of conducting tissue courses along its dorsal margin and bifurcates at its inferior margin into the right and left crura.

Synonym(s): pars membranacea septi interventricularisTA, membranous septum2, septum membranaceum ventriculorum

Further information

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.