atrioventricular bundle

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bundle

 [bun´d'l]
a collection of fibers or strands, as of muscle fibers or nerve fibers. See also tract and fasciculus.
atrioventricular bundle bundle of His.
fundamental bundle (ground bundle) that part of the white matter of the spinal cord bordering the gray matter and containing fibers that travel for a distance of only a few segments of the cord.
bundle of His a band of cardiac muscle fibers connecting the atria with the ventricles of the heart; called also atrioventricular bundle.
Bundle of His considered as the trunk of the bundle and excluding the bundle branches. From Dorland's, 2000.
medial forebrain bundle a group of nerve fibers connecting the midbrain tegmentum and elements of the limbic system.
Thorel's bundle a bundle of muscle fibers in the human heart connecting the sinoatrial and atrioventricular nodes.

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.

atrioventricular bundle

atrioventricular (AV) bundle

a band of atypical cardiac muscle fibers with few contractile units. It arises from the distal portion of the AV node and extends across the AV groove to the top of the interventricular septum, where it divides into the bundle branches. Also called bundle of His.

bundle of His

A bundle of specialised cardiac muscle fibres which carries the electric impulses for the co-ordinated contraction of the heart. The bundle begins at the AV node located at the inferior interatrial septum, and passes into the subendocardium through the right fibrous trigone to the interventricular septum, after which it divides into right and left limbs that pass along either side of the septum, branching to the walls of the ventricles.

atrioventricular bundle

Bundle of His, AV bundle Anatomy A group of specialized cardiac fibers that conduct impulses from the AV node to the ventricle

bundle of His

or

atrioventricular bundle

a group of specialized muscle fibres in the mammalian heart carrying electrical signals from the ATRIOVENTRICULAR NODE down the septum between the ventricles and eventually dividing up into Purkinje fibres. See HEART and Fig. 189 .

Gaskell,

Walter H., English physiologist, 1847-1914.
Gaskell bridge - a bundle of modified cardiac muscle fibers. Synonym(s): atrioventricular bundle
Gaskell clamp - an instrument for crushing the atrioventricular bundle in experimental animals and thus producing heart block.

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

His,

Wilhelm, Jr., German physician, 1863-1934.
His band - Synonym(s): His bundle
His bundle - modified cardiac muscle fibers. Synonym(s): atrioventricular bundle; His band; Kent bundle; Kent-His bundle
His bundle electrogram - an electrogram recorded from the His bundle.
His bundle heart block
His bundle recording
His spindle - a fusiform dilation of the aorta immediately beyond the isthmus. Synonym(s): aortic spindle
His-Tawara system - the complex system of interlacing Purkinje fibers within the ventricular myocardium.
Kent-His bundle - Synonym(s): His bundle

His,

Wilhelm, Sr., Swiss anatomist and embryologist in Germany, 1831-1904.
duct of His - Synonym(s): Bochdalek duct
His copula - a median elevation in the floor of the embryonic pharynx that is incorporated in the root of the tongue. Synonym(s): hypobranchial eminence
His line - a line dividing the face into an upper and a lower, or dental part.
His perivascular space - Synonym(s): Virchow-Robin space
His rule - an obsolete calculation for the duration of pregnancy.
isthmus of His - the anterior portion of the rhombencephalon connecting with the mesencephalon. Synonym(s): rhombencephalic isthmus

atrioventricular

pertaining to an atrium and ventricle of the heart.

accessory tract atrioventricular conduction
see accessory tract atrioventricular conduction.
atrioventricular block
see atrioventricular heart block.
atrioventricular bundle
bundle of His.
common atrioventricular canal
a congenital cardiac defect in which both sides of the heart share the same atrioventricular orifice. Called also persistent atrioventricular canal, atrioventricularis communis.
atrioventricular node
a mass of cardiac muscle fibers (Purkinje fibers) lying on the right lower part of the interatrial septum of the heart. Its function is the transmission of the cardiac impulse from the sinoatrial node to the muscular walls of the ventricles. The conductive system is organized so that transmission is slightly delayed at the atrioventricular node, thus allowing time for the atria to empty their contents into the ventricles before the ventricles begin to contract.
partitioning atrioventricular canal
during embryological development partitioning of the cardiac chambers and their orifices may be incomplete, leading to fatal cardiac defects, e.g. persistent atrioventricular chamber.
persistent common atrioventricular canal
atrioventricular stenosis
left and right atrioventricular stenosis are recorded; the former is an acyanotic defect, the latter is more serious and a cyanotic defect.
atrioventricular trunk
see bundle of His.
atrioventricular valvular disease
may be identifiable on finding of systolic murmur (incompetent valve) or diastolic murmur (stenotic valve) over the apex of the heart with maximum audibility over the left or right sides, depending on the side involved.
Wenckebach atrioventricular block
see Mobitz atrioventricular heart block.

bundle

a collection of fibers or strands, as of muscle fibers, or a fasciculus or band of nerve fibers.

accessory bundle of Kent
bundle of His.
atrioventricular bundle
bundle of His.
Bachmann bundle
a large muscle bundle between the right and left atria, thought to serve as a specialized conduction pathway.
bundle branch
see bundle branch.
fundamental bundle
that part of the white matter of the spinal cord bordering the gray matter and containing fibers that travel for a distance of only a few segments of the cord. Called also ground bundle.
bundle of His
a band of atypical cardiac muscle connecting the atria with the ventricles of the heart; called also atrioventricular bundle.
His bundle degeneration
associated with sudden unexpected death or periods of viciousness; most common in Doberman and German shepherd dogs.
His bundle stenosis
inherited in Pug dogs; associated with syncope and sudden death.
Keith's bundle
a bundle of fibers in the wall of the atrium of the heart between the venae cavae.
medial forebrain bundle
a group of nerve fibers connecting the midbrain tegmentum and elements of the limbic system.
sinoatrial bundle
Keith's bundle.
Thorel's bundle
a bundle of muscle fibers in the human heart connecting the sinoatrial and atrioventricular nodes.
uncinate bundle
the sharply bent bundle that connects the frontal lobe of the brain with the temporal and occipital lobes.
bundle of Vicq d'Azyr
a band of fibers from the mamillary body to the anterior nucleus of the thalamus.
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