Keith bundle

a·tri·o·ven·tric·u·lar bun·dle

[TA]

the bundle of modified cardiac muscle fibers that begins at the atrioventricular node as the trunk of the atrioventricular bundle and passes through the right atrioventricular fibrous ring to the membranous part of the interventricular septum where the trunk divides into two branches, the right bundle [TA] (crus dextrum [TA]) of the atrioventricular bundle and the left bundle [TA] (crus sinistrum [TA]) of the atrioventricular bundle; the two crura ramify in the subendocardium of their respective ventricles.

Synonym(s): fasciculus atrioventricularis [TA], atrioventricular band, Gaskell bridge, His band, His bundle, bundle of His, Keith bundle, Kent bundle (1) , Kent-His bundle, truncus fascicularis atrioventricularis, trunk of atrioventricular bundle, ventriculonector

Keith bundle

, Keith node (kēth)

[Sir Arthur Keith, Brit. anatomist, 1866–1955]

Sinoatrial node of the heart.

Keith,

Sir Arthur, Scottish anatomist, 1866-1955.

Keith bundle - modified cardiac muscle fibers. Synonym(s): atrioventricular bundle

Keith and Flack node - the mass of specialized cardiac muscle fibers that normally acts as the pacemaker of the cardiac conduction system. Synonym(s): Flack node; Keith node; sinuatrial node

Keith node - Synonym(s): Keith and Flack node