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WordNet
- play chords on (a string instrument)
- a straight line connecting two points on a curve
- a combination of three or more notes that blend harmoniously when sounded together
PrepTutorEJDIC
- (楽器の)弦 / 感情,情緒 / 和音,コード / =cord4 / 弦(数学で,円周上の2点を結ぶ直線)
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2017/05/21 14:57:15」(JST)
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"Heart strings" redirects here. For other uses, see Heart Strings (disambiguation).
Chordae tendineae |
The chordae tendineae are the tendons connecting the valves to the heart muscle
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Papillary muscles and chordae tendineae
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Details |
Identifiers |
Latin |
chordae tendineae cordis |
MeSH |
A07.541.510.240 |
Dorlands
/Elsevier |
c_31/12236883 |
TA |
A12.1.00.023 |
FMA |
76527 |
Anatomical terminology
[edit on Wikidata]
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The chordae tendineae (tendinous chords), colloquially known as the heart strings, are cord-like tendons that connect the papillary muscles to the tricuspid valve and the mitral valve in the heart.
Chordae tendinae are approximately 80% collagen, while the remaining 20% is made up of elastin and endothelial cells.
Contents
- 1 Structure
- 2 Function
- 3 Additional images
- 4 See also
- 5 References
Structure
Tendon of Todaro
The tendon of Todaro is a continuation of the Eustachian valve of the inferior vena cava and the Thebesian ring of the coronary sinus. Along with the opening of the coronary sinus and the septal cusp of the tricuspid valve, it makes up the triangle of Koch. The apex of the triangle of Koch is the location of the atrioventricular node.
Function
A medical illustration showing a cross section of the heart and lungs, chordae tendineae visible.
During atrial systole, blood flows from the atria to the ventricles down the pressure gradient. Chordae tendineae are relaxed because the atrioventricular valves are forced open.[1]
When the ventricles of the heart contract in ventricular systole, the increased blood pressures in both chambers push the AV valves to close simultaneously, preventing backflow of blood into the atria. Since the blood pressure in atria is much lower than that in the ventricles, the flaps attempt to evert to the low pressure regions. The chordae tendineae prevent the eversion, prolapse, by becoming tense thus pulling the flaps, holding them in closed position.[1]
Additional images
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Papillary muscles and chordae tendineae
See also
This article uses anatomical terminology; for an overview, see Anatomical terminology.
References
- ^ a b Karas, S.; Elkins, R. C. (1970). "Mechanism of Function of the Mitral Valve Leaflets, Chordae Tendineae and Left Ventricular Papillary Muscles in Dogs". Circulation Research. 26 (6): 689–96. doi:10.1161/01.RES.26.6.689. PMID 5422929.
Anatomy of the heart
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General |
Surface |
- base
- apex
- sulci
- coronary
- interatrial
- anterior interventricular
- posterior interventricular
- borders
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Internal |
- atria
- interatrial septum
- pectinate muscles
- terminal sulcus
- ventricles
- interventricular septum
- trabeculae carneae
- chordae tendineae
- papillary muscle
- valves
- cusps
- atrioventricular septum
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- cardiac skeleton
- intervenous tubercle
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Chambers |
Right heart |
- (venae cavae, coronary sinus) → right atrium (atrial appendage, fossa ovalis, limbus of fossa ovalis, crista terminalis, valve of inferior vena cava, valve of coronary sinus) → tricuspid valve → right ventricle (infundibulum, moderator band/septomarginal trabecula) → pulmonary valve → (pulmonary artery and pulmonary circulation)
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Left heart |
- (pulmonary veins) → left atrium (atrial appendage) → mitral valve → left ventricle → aortic valve (aortic sinus) → (aorta and systemic circulation)
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Layers |
Endocardium |
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Myocardium |
- Conduction system
- cardiac pacemaker
- SA node
- AV node
- bundle of His
- bundle branches
- Purkinje fibers
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Pericardial cavity |
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Pericardium |
- fibrous pericardium
- sternopericardial ligaments
- serous pericardium
- epicardium/visceral layer
- fold of left vena cava
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Blood supply |
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UpToDate Contents
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English Journal
- A finite strain nonlinear human mitral valve model with fluid structure interaction.
- Gao H1, Ma X, Nan Q, Berry C, Griffith BE, Luo X.
- International journal for numerical methods in biomedical engineering.Int J Numer Method Biomed Eng.2014 Oct 15. doi: 10.1002/cnm.2691. [Epub ahead of print]
- A simulated human mitral valve under a physiological pressure loading is developed using a hybrid finite element immersed boundary method, which incorporates experimentally based constitutive laws in a three-dimensional fluid-structure interaction framework. A transversely isotropic material constit
- PMID 25319496
- Fibrous Cyst of the Chordae Tendineae of the Mitral Valve: Echocardiographic Appearance and Literature Review.
- Zhu YB1, Zhang XH, Wang LQ, Guan X.
- Echocardiography (Mount Kisco, N.Y.).Echocardiography.2014 Sep 24. doi: 10.1111/echo.12750. [Epub ahead of print]
- Fibrous cyst of the chordae tendineae of the mitral valve (MV) is defined as a fibrous cyst arising from the chordae tendineae of the MV. It is extremely rare and its etiology is not clear. We present a case of a cystic structure within the left ventricle. This structure is connected to the anterior
- PMID 25251665
- Acute rupture of chordae tendineae of the mitral valve in infants: a nationwide survey in Japan exploring a new syndrome.
- Shiraishi I1, Nishimura K2, Sakaguchi H2, Abe T2, Kitano M2, Kurosaki K2, Kato H2, Nakanishi T2, Yamagishi H2, Sagawa K2, Ikeda Y2, Morisaki T2, Hoashi T2, Kagisaki K2, Ichikawa H2.
- Circulation.Circulation.2014 Sep 23;130(13):1053-61. doi: 10.1161/CIRCULATIONAHA.114.008592. Epub 2014 Jul 25.
- BACKGROUND: Recently, infant cases of acute heart failure attributable to rupture of the mitral chordae tendineae have been reported. However, little is known about the pathogenesis and clinical course of this condition.METHODS AND RESULTS: Ninety-five children with rupture of mitral chordae tendine
- PMID 25062691
Japanese Journal
- 尾長谷 喜久子,大倉 宏之
- 超音波医学 41(2), 165-174, 2014
- 経食道心エコーで左房側から描出されるsurgeon's viewは,リアルタイムで描出が可能で僧帽弁の解剖を容易に理解できることから,3次元心エコー図法のなかで最も臨床に応用される手法である.また,取り込まれた3次元画像から2次元画像を切り出すmultiplaner reconstruction(MPR)法は,2次元心エコーでは描出の難しい断面を描出することができ,僧帽弁病変の詳細な観察が可能であ …
- NAID 130004496915
- 心房細動に対する経皮的カテーテル心筋焼灼術中にマッピングカテーテルが抜去困難となり,緊急開心術を要した1症例
- 三井 法真,濱中 喜晴,岡田 健志,濱石 誠,平井 伸司
- 日本心臓血管外科学会雑誌 42(5), 399-402, 2013
- 左室破裂は心臓手術の際に生じうる重症な合併症のひとつであり,僧帽弁置換術に伴っておこることが多いとされる.われわれは僧帽弁形成術の施行中,人工心肺終了後の止血中に左室破裂を生じ,再度の人工心肺装着,補助下に破裂部直接縫合閉鎖を行い救命し得た症例を経験したので報告する.症例は58歳男性,健診で心雑音を指摘され近医受診,心エコーにて僧帽弁逸脱による3度の僧帽弁閉鎖不全と診断された.胸骨正中切開,人工心 …
- NAID 130004887150
Related Links
- The chordae tendineae are strong, fibrous strings attached to the leaflets (or cusps) of the heart on the ventricular side; i. e. , the lower chamber. These strings originate from small mounds of muscle tissue, the papillary muscles ...
- During atrial systole, blood flows from the atria to the ventricles down the pressure gradient. Chordae tendineae are relaxed because the atrioventricular valves are forced open. [1] When the ventricles of the heart contract in ventricular ...
Related Pictures
★リンクテーブル★
[★]
- 英
- tendinous cord (M,Z)
- ラ
- chordae tendineae (N,KH,KL), CT
[★]
腱索
- 関
- chordae tendineae
[★]
- 関
- chorda、chordal、cord、tendon
[★]
- 関
- chordae、chordal、cord、tendon