WordNet

make into a bundle; "he bundled up his few possessions" (同)bundle_up, roll_up
sleep fully clothed in the same bed with ones betrothed (同)practice bundling
a package of several things tied together for carrying or storing (同)sheaf
the 1st letter of the Roman alphabet (同)a
the blood group whose red cells carry the A antigen (同)type_A, group A
the act of binding something into a bundle
the act of shoving hastily; "she complained about bundling the children off to school"
a onetime custom during courtship of unmarried couples occupying the same bed without undressing

PrepTutorEJDIC

(…の)『束』,『包み』,巻いたもの(旅行者の荷物など)《+『of』+『名』》 / …'を'包みにする,束にする / (…に)…'を'ごっちゃに投げ込む《+『名』+『into』+『名』》 / 荷物をまとめてさっさと出て行く《+『off』(『out』,『away』)》
answer / ampere

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2017/11/28 23:54:42」(JST)

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[Wiki en表示]

The bundle of His or His bundle is a collection of heart muscle cells specialized for electrical conduction. As part of the electrical conduction system of the heart, it transmits the electrical impulses from the AV node (located between the atria and the ventricles) to the point of the apex of the fascicular branches via the bundle branches. The fascicular branches then lead to the Purkinje fibers, which provide electrical conduction to the ventricles, causing the cardiac muscle of the ventricles to contract at a paced interval.

Function

The bundle of His is an important part of the electrical conduction system of the heart, as it transmits impulses from the atrioventricular node, located at the inferior end of the interatrial septum, to the ventricles of the heart. The intrinsic rate of the bundle of His is 20 or less beats per minute.^[1] The bundle of His branches into the left and the right bundle branches, which run along the interventricular septum. The left bundle branch further divides into the left anterior and the left posterior fascicles. These bundles and fascicles give rise to thin filaments known as Purkinje fibers. These fibers distribute the impulse to the ventricular muscle. The ventricular conduction system comprises the bundle branches and the Purkinje networks. It takes about 0.03–0.04 seconds for the impulse to travel from the bundle of His to the ventricular muscle.

Clinical significance

Disorders affecting the cardiomyocytes that make up the electrical conduction system of the heart are called heart blocks. Heart blocks are separated into different categories based on the location of the cellular damage. Damage to any of the conducting cells in or below the bundle of His are collectively referred to as "infra-Hisian blocks". To be specific, blocks that occur in the right or left bundle branches are called "bundle branch blocks", and those that occur in either the left anterior or the left posterior fascicles are called "fascicular blocks", or "hemiblocks". The conditions in which both the right bundle branch and either the left anterior fascicle or the left posterior fascicle are blocked are collectively referred to as bifascicular blocks, and the condition in which the right bundle branch, the left anterior fascicle, and the left posterior fascicle are blocked is called trifascicular block. Infra-hisian blocks limit the heart's ability to coordinate the activities of the atria and ventricles, which usually results in a decrease in its efficiency in pumping blood.

Pacing

A 2000 study found that direct His bundle pacing is more effective in producing synchronized ventricular contraction—and therefore in improving cardiac function—than apical pacing.^[2]

Etymology

These specialized muscle fibers in the heart were named after the Swiss cardiologist Wilhelm His, Jr., who discovered them in 1893.^[3]^[4]

References

^ Medical physiology; Boron^{[full citation needed]}
^ Deshmukh P, Casavant DA, Romanyshyn M, Anderson K (February 2000). "Permanent, direct His-bundle pacing: a novel approach to cardiac pacing in patients with normal His-Purkinje activation". Circulation. 101 (8): 869–77. doi:10.1161/01.CIR.101.8.869. PMID 10694526.
^ His' bundle at Who Named It?
^ His, W., Jr. (1893). "Die Tätigkeit des embryonalen Herzens und deren Bedeutung für die Lehre von der Herzbewegung beim Erwachsenen". Arbeiten aus der medizinischen Klinik zu Leipzig. Jena, DE. 1: 14–50.

External links

Atlas image: ht_rt_vent at the University of Michigan Health System - "Right atrioventricular bundle branch, anterior view"
thoraxlesson4 at The Anatomy Lesson by Wesley Norman (Georgetown University) (thoraxheartinternalner)
https://web.archive.org/web/20070929080346/http://www.healthyheart.nhs.uk/heart_works/heart03.shtml

UpToDate Contents

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1. 心筋梗塞後の伝導異常 conduction abnormalities after myocardial infarction
2. 先天性心疾患における心房性不整脈（房室ブロックを含む） atrial arrhythmias including av block in congenital heart disease
3. 心電図チュートリアル：伝導系の生理学 ecg tutorial physiology of the conduction system
4. 心電図チュートリアル：房室ブロック ecg tutorial atrioventricular block
5. 房室ブロックの原因 etiology of atrioventricular block

English Journal

Haptoral neuromusculature in two species of Dactylogyrus Diesing, 1850 (Monogenea: Dactylogyridae).

Petrov A1, Gerasev P2, Popyuk M3, Dmitrieva E3.
Systematic parasitology.Syst Parasitol.2016 May;93(4):337-54. doi: 10.1007/s11230-015-9620-x. Epub 2016 Apr 18.
The taxonomy of Dactylogyrus Diesing, 1850 (Monogenea: Dactylogyridae), like that of most monopisthocotyleans, relies heavily on the morphology of sclerites of the posterior attachment organ (haptor). However, the associated neuromusculature is essentially unknown and, therefore, the aim of this stu
PMID 27095663

Long RP' Tachycardia with Unusual Entrainment Responses: What is the Mechanism?

Doi A1, Takagi M1, Fujimoto K1, Kakihara J1, Hayashi Y1, Tatsumi H1, Yoshiyama M1.
Journal of cardiovascular electrophysiology.J Cardiovasc Electrophysiol.2016 Apr 19. doi: 10.1111/jce.12987. [Epub ahead of print]
A 71-year-old man with palpitation was referred for electrophysiological study and radiofrequency ablation. Baseline findings of 12-lead electrocardiogram during sinus rhythm and echocardiography were normal. Atrio-His (AH) and His-ventricular (HV) intervals were measured as 113 and 40 ms, respectiv
PMID 27090609

Aortic annulus to left coronary distance as a predictor for persistent left bundle branch block after TAVI.

Hein-Rothweiler R1, Jochheim D1,2, Rizas K1, Egger A1, Theiss H1, Bauer A1, Massberg S1,2, Mehilli J1,2.
Catheterization and cardiovascular interventions : official journal of the Society for Cardiac Angiography & Interventions.Catheter Cardiovasc Interv.2016 Apr 1. doi: 10.1002/ccd.26503. [Epub ahead of print]
OBJECTIVES: To identify potential predictors for ventricular conduction delay and to evaluate the impact of interventricular dyssynchrony on mortality after implantation of a balloon-expandable aortic valve (BEV).METHODS AND RESULTS: Clinical, computertomographical (CT), and electrocardiographical (
PMID 27038099

Japanese Journal

Natural convection heat transfer from vertical rod bundles in liquid sodium

Mechanical Engineering Journal advpub(0), 2016
NAID 130005127106

Electrocardiographic and Chronobiological Features of Paroxysmal AV Block Recorded by Ambulatory Electrocardiography

The Journal of Medical Investigation 61(3.4), 380-387, 2014
NAID 130004822745

Potential Benefit of Bachmann's Bundle Pacing on Left Ventricular Performance in Patients With Cardiac Resynchronized Therapy

Circulation journal : official journal of the Japanese Circulation Society 76(12), 2799-2806, 2012-11-25
NAID 10031126051

★リンクテーブル★

リンク元	「AV束」
関連記事	「bundle」「A」「AV」

「AV束」

Bundle of His
	Isolated heart conduction system showing bundle of His
	Heart cut-away showing the bundle of His. Schematic representation of the atrioventricular bundle of His. The bundle, represented in red, originates near the orifice of the coronary sinus, undergoes slight enlargement to form the AV node. The AV node tapers down into the bundle of His, which passes into the ventricular septum and divides into two bundle branches, the left and right bundles. Sometimes the 'left and right bundles of His' are called Purkyně or Purkinje fibers. The ultimate distribution cannot be completely shown in this diagram.
Details
Identifiers
Latin	fasciculus atrioventricularis
Dorlands; /Elsevier	12200650
TA	A12.1.06.005
FMA	9484
	Anatomical terminology [edit on Wikidata]