subendocardial branches of atrioventricular bundles
Definition: interlacing fibers formed of modified cardiac muscle cells with central granulated protoplasm containing one or two nuclei and a transversely striated peripheral portion; they are the terminal ramifications of the conducting system of the heart found beneath the endocardium of the ventricles.
Synonym(s): rami subendocardiales fasciculi atrioventricularisTA, Purkinje fibers
See Also: conducting system of heart
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