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
- 筋肉の,筋力のある / 力ずくの
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2016/09/24 13:48:29」(JST)
[Wiki en表示]
Papillary muscle |
Interior of right side of heart. Papillary muscles labeled in purple.
|
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 |
Identifiers |
Latin |
musculus papillaris |
TA |
A12.1.00.022 |
FMA |
76526 |
Anatomical terminology
[edit on Wikidata]
|
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 - diagonal branch (LAD) and left circumflex artery - obtuse marginal branch (LCX)
- Posteromedial muscle blood supply: right coronary artery - posterior interventricular 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
-
Opened chambers of the heart displaying papillary muscles and chordae tendinae
-
Papillary muscles and chordae tendinae
-
Papillary muscles and chordae tendinae
-
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. pp. 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
- Human heart model (left internal anatomy)[dead link] - BioWeb at University of Wisconsin System
- 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
Anatomy of the heart
|
|
General |
Surface |
- base
- apex
- sulci
- coronary
- interatrial
- anterior interventricular
- posterior interventricular
- borders
|
|
Internal |
- atria
- interatrial septum
- pectinate muscles
- terminal sulcus
- ventricles
- interventricular septum
- trabeculae carneae
- chordae tendineae
- papillary muscle
- valves
- cusps
- atrioventricular septum
|
|
- cardiac skeleton
- intervenous tubercle
|
|
|
|
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)
|
|
Left heart |
- (pulmonary veins) → left atrium (atrial appendage) → mitral valve → left ventricle → aortic valve (aortic sinus) → (aorta and systemic circulation)
|
|
|
Layers |
Endocardium |
|
|
Myocardium |
- Conduction system
- cardiac pacemaker
- SA node
- AV node
- bundle of His
- bundle branches
- Purkinje fibers
|
|
Pericardial cavity |
|
|
Pericardium |
- fibrous pericardium
- sternopericardial ligaments
- serous pericardium
- epicardium/visceral layer
- fold of left vena cava
|
|
|
Blood supply |
|
UpToDate Contents
全文を閲覧するには購読必要です。 To read the full text you will need to subscribe.
English Journal
- Erratum to: An endoscopic and anatomical approach to the septal papillary muscle of the conus.
- Loukas M1, Shane Tubbs R, Louis RG Jr, Apaydin N, Bartczak A, Vefali H, Alsaiegh N, Fudalej M.
- Surgical and radiologic anatomy : SRA.Surg Radiol Anat.2015 Jul;37(5):569. doi: 10.1007/s00276-015-1422-y.
- PMID 25601580
- Left ventricular myxoma causing sudden death.
- Kitchin PL1, Benson P.
- The American journal of forensic medicine and pathology.Am J Forensic Med Pathol.2015 Jun;36(2):58-60. doi: 10.1097/PAF.0000000000000141.
- Sudden cardiac death due to a myxoma is rarely reported in the literature. Cardiac myxomas are benign tumors of the heart, most frequently located in the left atrium. Left ventricular myxomas are rare. Left ventricular myxomas attached to the anterior papillary muscle are especially rare, with only
- PMID 25710796
- 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
Japanese Journal
- Arrhythmogenic right ventricular cardiomyopathy coincided with the cardiac fibrosis in the inner muscle layer of the left ventricular wall in a boxer dog
- , , , , , , , , , , ,
- Journal of Veterinary Medical Science advpub(0), 2015
- … Cardiac fibrosis and intimal thickening of the small arteries occurred without fatty replacement in the inner muscle layer including the papillary muscles of the left ventricular wall. … This paper describes the pathomorphological details of an ARVC case with coincidental cardiac fibrosis in the inner muscle layer of the left ventricular wall. …
- NAID 130005067043
- 乳頭筋異常による左室流出路狭窄に対して僧帽弁置換術を施行した1例
- 瀬尾 浩之,藤井 弘通,青山 孝信,笹子 佳門
- 日本心臓血管外科学会雑誌 44(2), 92-96, 2015
- 症例は72歳の男性.閉塞性肥大型心筋症と診断され,4年間,薬物加療が行われていたが,労作時倦怠感および呼吸苦が出現した.心エコー検査では,全周性の心筋肥大と左室中部から流出路における狭窄病変を認め,同部位での最大圧較差は94 mmHgと増悪していた.また,前乳頭筋が著明に肥大して前方に偏位しており,同乳頭筋から僧帽弁前尖へ付着する腱索が著明に短縮しtetheringを認めていた.収縮期には,肥大し …
- NAID 130005062373
- Surgical Strategy for Ischemic Mitral Regurgitation Adopting Subvalvular and Ventricular Procedures
- , , , , ,
- Annals of Thoracic and Cardiovascular Surgery advpub(0), 2015
- … (MR).Methods: We studied 90 patients who underwent surgical repair of ischemic MR between 1999 and 2013 according to our surgical strategy adding submitral and ventricular procedures to annuloplasty as follows: annuloplasty alone (stage 1, n = 30), additional papillary muscle approximation (PMA) for progression of tethering (stage 2, n = 26), and additional left ventriculoplasty with PMA for progression of LV remodeling and tethering (stage 3, n = 34).Results: The preoperative New York Heart Association (NYHA) functional classes …
- NAID 130004889831
Related Links
- Papillary muscle: A small muscle within the heart that anchors the heart valves. The anchor ropes are the chordae tendineae, thread-like bands of fibrous tissue that attach on one end to the edges of the tricuspid and mitral valves of ...
- Location: 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. The three papillary ...
Related Pictures
★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
[★]
[★]