atrioventricular block

房室ブロック

WordNet

1. a three-dimensional shape with six square or rectangular sides (同)cube
2. (computer science) a sector or group of sectors that function as the smallest data unit permitted; "since blocks are often defined as a single sector, the terms `block and `sector are sometimes used interchangeably"
3. support, secure, or raise with a block; "block a plate for printing"; "block the wheels of a car"
4. a solid piece of something (usually having flat rectangular sides); "the pyramids were built with large stone blocks"
5. housing in a large building that is divided into separate units; "there is a block of classrooms in the west wing"
6. a rectangular area in a city surrounded by streets and usually containing several buildings; "he lives in the next block" (同)city block
7. an inability to remember or think of something you normally can do; often caused by emotional tension; "I knew his name perfectly well but I had a temporary block" (同)mental_block
8. a number or quantity of related things dealt with as a unit; "he reserved a large block of seats"; "he held a large block of the companys stock"
9. interrupt the normal function of by means of anesthesia; "block a nerve"; "block a muscle"
10. run on a block system; "block trains"
11. shape by using a block; "Block a hat"; "block a garment"
12. shape into a block or blocks; "block the graphs so one can see the results clearly"
13. stamp or emboss a title or design on a book with a block; "block the book cover"
14. completely obstructed or closed off; "the storm was responsible for many blocked roads and bridges"; "the drain was plugged" (同)plugged
15. closed to traffic; "the repaving results in many blocked streets" (同)out of use
16. a group of countries in special alliance (同)axis
17. relating to or affecting the atria and ventricles of the heart; "atrioventricular disease" (同)auriculoventricular
18. the act of obstructing or deflecting someones movements (同)block

PrepTutorEJDIC

1. (木・石などの,通例平らな面のある)『かたまり』 / 《米》(四団を街路に囲まれた)『区画』,街区 / 街区の1辺の距離(一般に40メートル前後) / 《英》ブロック(アパート・事務所・商店などに区切られている大きな建物) / 『妨害物』,障害物(obstacle);(障害によって生じた)停滞,渋滞 / 台木,台(まないた・肉切り台・まき割り台・せり売り台・帽子の木型など);《the~》炭頭台 / (特にアメリカンフットボールで)ブロック(相手の選手の突進を阻止する) / 滑車(pulley) / (座席券・株券などの)一組《+『of』+『名』》 / 〈通路など〉'を'『ふさぐ』,〈通行・進行など〉'を'妨げる / 〈帽子など〉の型取りをする / (特にアメリカンフットボールで)〈相手選手の突進〉'を'ブロックする;(ボクシングで)〈相手のパンチ〉'を'ブロックする
2. ブロック,圏(地理・共通の利害・政治・経済上の目的などのために団結した団体・国家などの結合体)

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2012/11/12 10:08:21」(JST)

wiki en

[Wiki en表示]

Atrioventricular block
Classification and external resources
ICD-10	I44.0-I44.3
ICD-9	426.0-426.1
eMedicine	med/189
MeSH	D054537

An atrioventricular block (or AV block) involves the impairment of the conduction between the atria and ventricles of the heart. Under normal conditions, SA node in the atria sets the pace for the heart, and these impulses travel down to the ventricles. In an AV block, this message does not reach the ventricles or is impaired along the way. The ventricles of the heart have their own pacing mechanisms, which can maintain a lowered heart rate in the absence of SA stimulation.

The causes of pathological AV block are varied and include ischaemia, infarction, fibrosis or drugs, and the blocks may be complete or may only impair the signaling between the SA and AV nodes. Certain AV blocks can also be found as normal variants, such as in athletes or children, and are benign. Strong vagal stimulation may also produce AV block. The cholinergic receptor types affected are the muscarinic receptors.

There are three types:

• First degree AV block - PR interval greater than 0.20sec.
• Second degree AV block - Type 1 (aka Mobitz 1, Wenckebach): Progressive prolongation of PR interval with dropped beats (the PR interval gets longer and longer; finally one beat drops) . Type 2 (aka Mobitz 2, Hay): PR interval remains unchanged prior to the P wave which suddenly fails to conduct to the ventricles.
• Third degree AV block - No association between P waves and QRS complexes.

Sinus rhythm with acute inferior infarction complicated by Type I A-V block manifest in the form of 5:4 Wenckebach periods; R-P/P-R reciprocity.

Sinus rhythm (rate = 100/min) with 3:2 and 2:1 Type II A-V block; RBBB

Sinus tachycardia with complete A-V block and resulting junctional escape

References

External links

• http://www.umm.edu/imagepages/1429.htm
• http://emedicine.medscape.com/article/161919-overview

UpToDate Contents

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• 1. 第2度房室ブロック：モビッツII型 second degree atrioventricular block mobitz type ii
• 2. 第1度房室ブロック first degree atrioventricular block
• 3. 第3度（完全）房室ブロック third degree complete atrioventricular block
• 4. 房室ブロックの原因 etiology of atrioventricular block
• 5. 第2度房室ブロック：モビッツI型（ウェンケバッハブロック） second degree atrioventricular block mobitz type i wenckebach block

English Journal

• Ongoing requirement for pacing post-transcatheter aortic valve implantation and surgical aortic valve replacement.

• Simms AD, Hogarth AJ, Hudson EA, Worsnop VL, Blackman DJ, O'Regan DJ, Tayebjee MH.SourceThe Yorkshire Heart Centre, Leeds, UK.
• Interactive cardiovascular and thoracic surgery.Interact Cardiovasc Thorac Surg.2013 Aug;17(2):328-33. doi: 10.1093/icvts/ivt175. Epub 2013 Apr 25.
• OBJECTIVES Transcatheter aortic valve implantation (TAVI) is an established intervention for aortic stenosis. While it is known that the requirement for permanent pacing is higher following CoreValve (Medtronic, Inc., Minneapolis, MN, USA) TAVI than after surgical aortic valve replacement (SAVR), it
• PMID 23620339

• Structure, function and clinical relevance of the cardiac conduction system, including the atrioventricular ring and outflow tract tissues.

• Dobrzynski H, Anderson RH, Atkinson A, Borbas Z, D'Souza A, Fraser JF, Inada S, Logantha SJ, Monfredi O, Morris GM, Moorman AF, Nikolaidou T, Schneider H, Szuts V, Temple IP, Yanni J, Boyett MR.SourceUniversity of Manchester, UK. Electronic address: halina.dobrzynski@manchester.ac.uk.
• Pharmacology & therapeutics.Pharmacol Ther.2013 Aug;139(2):260-88. doi: 10.1016/j.pharmthera.2013.04.010. Epub 2013 Apr 20.
• It is now over 100years since the discovery of the cardiac conduction system, consisting of three main parts, the sinus node, the atrioventricular node and the His-Purkinje system. The system is vital for the initiation and coordination of the heartbeat. Over the last decade, immense strides have be
• PMID 23612425

• Provocation of an Autoimmune Response to Cardiac Voltage-Gated Sodium Channel NaV1.5 Induces Cardiac Conduction Defects in Rats.

• Korkmaz S, Zitron E, Bangert A, Seyler C, Li S, Hegedüs P, Scherer D, Li J, Fink T, Schweizer PA, Giannitsis E, Karck M, Szabó G, Katus HA, Kaya Z.SourceDepartment of Cardiac Surgery, University of Heidelberg, Heidelberg, Germany; DZHK (German Centre for Cardiovascular Research), partner site Heidelberg/Mannheim, University of Heidelberg, Heidelberg, Germany.
• Journal of the American College of Cardiology.J Am Coll Cardiol.2013 Jul 23;62(4):340-9. doi: 10.1016/j.jacc.2013.04.041. Epub 2013 May 15.
• OBJECTIVES: This study sought to test the hypothesis that inducing an autoimmune response against the cardiac sodium channel (NaV1.5) induces arrhythmias.BACKGROUND: Sporadic evidence supports the concept that autoantibodies may cause cardiac arrhythmias but substantial experimental investigations u
• PMID 23684688

Japanese Journal

• 完全房室ブロックをきたしたDuchenne型筋ジストロフィーの1例

• 久留 聡,棚橋 保,松本 慎二郎
• 臨床神経学 52(9), 685-687, 2012-09
• NAID 40019429908

• A case of atrioventricular block (Wenckebach type) induced by sugammadex

• OSAKA Yoshimune,SHIMADA Naho,SATOU Masaaki,MASUDA Takahiro,ANDO Takeshi,KOZONO Yuuki,SHIMADA Muneaki
• Journal of anesthesia 26(4), 627-628, 2012-08-20
• NAID 10031070630

• Catheter Ablation of Tachyarrhythmias From the Aortic Sinuses of Valsalva : When and How?

• TADA Hiroshi
• Circulation journal : official journal of the Japanese Circulation Society 76(4), 791-800, 2012-03-25
• … Site-specific and potential complications, such as a coronary artery occlusion or atrioventricular block, can occur with catheter ablation at the aortic sinuses of Valsalva. …
• NAID 10030130767

Related Links

• Atrioventricular Block — AV Blocks Resource for MD's and ...

Description of Types of AV block and ECG characteristics. There are three “degrees” of atrioventricular block, and within the three degrees, there are two subcategories in second-degree AV block. This page will describe the types of ...

• Atrioventricular Block

First-degree AV block: Generally not associated with any symptoms; it is usually an incidental finding on electrocardiography Second-degree AV block: Usually is asymptomatic, but in some patients, sensed irregularities of the heartbeat, presyncope, or syncope may occur; may manifest on physical ...

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★リンクテーブル★

リンク元	「房室ブロック」「AV block」「房室伝導障害」
拡張検索	「complete atrioventricular block」「congenital atrioventricular block」
関連記事	「block」「atrioventricular」

「房室ブロック」

　　[★]

英

atrioventricular block, AVB

同

A-Vブロック

関

完全房室ブロック

定義

• 房室間の興奮伝導が遅れた、または遮断された状態 (SP.536)
• 心房から心室への興奮の伝導が途絶、または遅延している状態

分類

• 第1度から第3度まで分類される (SP.536)
• I度房室ブロック：PQ間隔が延長し0.21秒以上になった状態
• II度房室ブロック：

• Morbitz I型 ：PQ間隔が漸次延長し、房室伝導途絶が起こる　←　Wenchebach周期　←　迷走神経興奮、薬剤、先天性心疾患、後天性心疾患
• Morbitz II型：PQ間隔が一定のまま、房室伝導途絶が起こる　←　器質的心疾患の存在
• 2:1房室ブロック

• III度房室ブロック：

原因

• 機能的障害：副交感神経過緊張、薬剤
• 器質的障害：房室伝導系(房室接合部、ヒス束、左脚、右脚)　←　虚血性心疾患、変性疾患、心筋炎、特発性

「AV block」

　　[★]

• 房室ブロック、AVブロック

関

atrioventricular block

「房室伝導障害」

　　[★]

英

atrioventricular block

関

房室ブロック

「complete atrioventricular block」

　　[★]

同

CAVB, 完全房室ブロック

redirect 完全房室ブロック

「congenital atrioventricular block」

　　[★] 先天性房室ブロック

「block」

　　[★]

• n.

• 遮断、塊、ブロック

• v.

• 遮断する、ブロックする、封鎖する、阻止する

関

blockade、blockage、deter、inhibit、inhibition、lump、prevent、prevention、repress、repression、seal、turn off

　 　 　 　 　 　 　 　 　 　 　 　 　 　

「atrioventricular」

　　[★]

• adj.

• 房室の

関

AV