乳頭筋 PM
WordNet
- make ones way by force; "He muscled his way into the office"
- animal tissue consisting predominantly of contractile cells (同)muscular_tissue
- one of the contractile organs of the body (同)musculus
- authority or power or force (especially when used in a coercive way); "the senators used their muscle to get the party leader to resign"
- (botany) a tiny outgrowth on the surface of a petal or leaf
- a small nipple-shaped protuberance concerned with taste, touch, or smell; "the papillae of the tongue"
- a small projection of tissue at the base of a hair or tooth or feather
- of or relating to or resembling papilla (同)papillose
PrepTutorEJDIC
- 〈U〉(動物体の組織としての)『筋肉』,筋(きん);〈C〉(体の各部を動かす)筋肉 / 〈U〉力,(特に)筋力,腕力 / 《俗に》(…に)強引に割り込む《+『in on』(『into, through』)+『名』》
- 乳頭;(毛根・歯根などにある)微小乳頭状突起物
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/06/23 07:19:49」(JST)
[Wiki en表示]
| Papillary muscle |
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Interior of right side of heart. Papillary muscles labeled in purple.
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Diagram showing relations of opened heart to front of thoracic wall.
Ant. Anterior segment of tricuspid valve.
A O. Aorta.
A.P. Anterior papillary muscle.
In. Brachiocephalic artery (Innominate).
L.C.C. Left common carotid artery.
L.S. Left subclavian artery.
L.V. Left ventricle.
P.A. Pulmonary artery.
R.A. Right atrium.
R.V. Right ventricle.
V.S. Ventricular septum. |
| Details |
| Latin |
musculus papillaris |
| Identifiers |
| Gray's |
p.532 |
Dorlands
/Elsevier |
12550081 |
| TA |
A12.1.00.022 |
| FMA |
76526 |
| Anatomical terminology |
The papillary muscles are muscles located in the ventricles of the heart. They attach to the cusps of the atrioventricular valves (also known as the mitral and tricuspid valves) via the chordae tendineae and contract to prevent inversion or prolapse of these valves on systole (or ventricular contraction).[1]
Contents
- 1 Structure
- 2 Function
- 3 Clinical significance
- 4 Additional images
- 5 See also
- 6 References
- 7 External links
Structure
There are five total papillary muscles in the heart, three in the right ventricle and two in the left. The anterior, posterior, and septal papillary muscles of the right ventricle each attach via chordae tendineae to the tricuspid valve. The anterior and posterior papillary muscles of the left ventricle attach via chordae tendineae to the mitral valve.[2]
Blood supply
The mitral valve papillary muscles in the left ventricle are called the anterolateral and posteromedial muscles.[3]
- Anterolateral muscle blood supply: left anterior descending artery (LAD) and left circumflex artery (LCX)
- Posteromedial muscle blood supply: right coronary artery (RCA)
The posteromedial muscle ruptures more frequently because it only has one source of blood supply.[3]
Function
The papillary muscles of both the right and left ventricles begin to contract shortly before ventricular systole and maintain tension throughout.[1] This prevents regurgitation—backward flow of ventricular blood into the atrial cavities—by bracing the atrioventricular valves against prolapse—being forced back into the atria by the high pressure in the ventricles.[1]
Clinical significance
Papillary muscle rupture can be caused by a myocardial infarct, and dysfunction can be caused by ischemia. Both complications may lead to worsening of mitral valve prolapse.[4]
Additional images
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Opened chambers of the heart displaying papillary muscles and chordae tendinae
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Papillary muscles and chordae tendinae
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Papillary muscles and chordae tendinae
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Papillary muscles. Deep dissection.
See also
References
- ^ a b c Moore KL, Dalley AF, Agur AM (2007). Clinically Oriented Anatomy (3rd ed.). Baltimore: Lippincott Williams & Wilkins. p. 92, 94. ISBN 978-0-7817-6274-8.
- ^ Netter's Atlas of Human Anatomy, plates 216B and 217A
- ^ a b Fradley, M. G.; Picard, M. H. (7 March 2011). "Rupture of the Posteromedial Papillary Muscle Leading to Partial Flail of the Anterior Mitral Leaflet". Circulation 123 (9): 1044–1045. doi:10.1161/CIRCULATIONAHA.110.984724.
- ^ Elizabeth D Agabegi; Agabegi, Steven S. (2008). Step-Up to Medicine (Step-Up Series). Hagerstwon, MD: Lippincott Williams & Wilkins. p. 40. ISBN 0-7817-7153-6.
External links
- Anatomy photo:20:19-0106 at the SUNY Downstate Medical Center} — "Heart: The Right Atrioventricular (Tricupsid) Valve" (anterior, posterior, septal papillary muscles)
- Anatomy photo:20:26-0105 at the SUNY Downstate Medical Center — "Heart: The Left Atrioventricular (Mitral) Valve" (anterior, posterior papillary muscles)
- -1368719301 at GPnotebook
- Bioweb at UWLAX Human heart model (left internal anatomy)
- Atlas image: ht_rt_vent at the University of Michigan Health System} — "Right atrioventricular bundle branch, anterior view"
- Definition of Papillary muscle
- MedicineNet Search Results
- Visit the educational website www.themitralvalve.org
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Anatomy of the heart
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| General |
| Surface |
- base
- apex
- grooves
- coronary/atrioventricular
- interatrial
- anterior interventricula
- posterior interventricular
- borders
- openings of smallest cardiac veins
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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
- Purkinje fibers
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| Pericardial cavity |
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| Pericardium |
- fibrous pericardium
- sternopericardiac ligaments
- serous pericardium
- epicardium/visceral layer
- fold of left vena cava
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| Blood supply |
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Index of the heart
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| Description |
- Anatomy
- Physiology
- Development
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| Disease |
- Injury
- Congenital
- Neoplasms and cancer
- Other
- Symptoms and signs
- Blood tests
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| Treatment |
- Procedures
- Drugs
- glycosides
- other stimulants
- antiarrhythmics
- vasodilators
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|
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UpToDate Contents
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English Journal
- Posterior leaflet segment 2 plication in ischemic mitral regurgitation repair.
- Ay Y1, Erkin A2, Kara I3, Aydin C1, Ay NK4, Zeybek R1.
- Asian cardiovascular & thoracic annals.Asian Cardiovasc Thorac Ann.2015 Jun;23(5):517-24. doi: 10.1177/0218492314547088. Epub 2014 Aug 10.
- AIM: To evaluate the medium-term results of plication of posterior leaflet segment 2 in addition to ring annuloplasty in patients with functional ischemic mitral regurgitation.METHODS: The study included 136 patients who underwent mitral valve repair with plication of posterior leaflet segment 2 for
- PMID 25114326
- Clinical and electrocardiographic characteristics of idiopathic ventricular arrhythmias with right bundle branch block and superior axis: Comparison of apical crux area and posterior septal left ventricle.
- Kawamura M1, Hsu JC2, Vedantham V3, Marcus GM3, Hsia HH3, Gerstenfeld EP3, Scheinman MM3, Badhwar N3.
- Heart rhythm : the official journal of the Heart Rhythm Society.Heart Rhythm.2015 Jun;12(6):1137-44. doi: 10.1016/j.hrthm.2015.02.029. Epub 2015 Feb 26.
- BACKGROUND: Right bundle branch block (RBBB) with superior axis electrocardiographic (ECG) morphology is common in patients with idiopathic ventricular arrhythmia (VA) originating from the left posterior fascicle (LPF), from the left ventricular (LV) posterior papillary muscles (PPM), and rarely fro
- PMID 25728755
- Arrhythmogenic right ventricular cardiomyopathy coincided with the cardiac fibrosis in the inner muscle layer of the left ventricular wall in a boxer dog.
- Yamada N1, Kitamori T, Kitamori F, Ishigami K, Iwanaga K, Itou T, Kobayashi R, Kumabe S, Doi T, Sato J, Wako Y, Tsuchitani M.
- The Journal of veterinary medical science / the Japanese Society of Veterinary Science.J Vet Med Sci.2015 May 8. [Epub ahead of print]
- A 7-year-old female boxer dog died suddenly without any clinical signs. It was suspected that the dog had arrhythmogenic right ventricular cardiomyopathy (ARVC) due to ventricular premature complexes and ventricular tachycardia at 3 years of age. The final diagnosis of ARVC was confirmed by histolog
- PMID 25959955
Japanese Journal
- Quantitative Assessment of Mitral Apparatus Geometry Using Dual-Source Computed Tomography in Mitral Regurgitation
- Quantitative Assessment of Mitral Apparatus Geometry Using Dual-Source Computed Tomography in Mitral Regurgitation
- Arrhythmogenic right ventricular cardiomyopathy coincided with the cardiac fibrosis in the inner muscle layer of the left ventricular wall in a boxer dog
Related Links
- The three right ventricular papillary muscles originate in ventricular wall, and attach to anterior, posterior and septal leaflets of the tricuspid valve via chordae tendinae. ... Location: The three right ventricular papillary muscles originate ...
- papillary muscle noun Anatomy. one of the small bundles of muscles attached to the ventricle walls and to the chordae tendineae that tighten these tendons during ventricular contraction. Origin: 1885–90 Dictionary.com Unabridged
★リンクテーブル★
[★]
- 英
- papillary muscle (Z), papillary muscles, PM
- ラ
- musculus papillaris, musculi papillares
- 関
- 心筋梗塞
血流支配
- 前外側乳頭筋：左前下行枝(LAD)、回旋枝(LCA) ← LAD病変だけでは断裂しにくい。
- 後内側乳頭筋：右冠動脈後下行枝(4PD。RADって書く?)
Henry Gray (1825-1861). Anatomy of the Human Body. 1918.
[★]
[★]
- 関
- nipple、papilla、papillae
[★]
[★]