WordNet

(Fungi) a remnant of the partial veil that in mature mushrooms surrounds the stem like a collar (同)skirt
relating to or resembling the miter worn by some clerics
of or relating to or located in or near the mitral valve; "mitral insufficiency"

PrepTutorEJDIC

Massachusetts / mental age
環(ring);環形のもの / (幾何で)環形 / (シダ類の胞子のうちの)環帯;(動体の)体環
〈法律など〉'を'無効にする;〈命令など〉'を'取り消す(cancel)

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/05/01 04:26:39」(JST)

wiki en

Mitral Valve

The mitral annulus is a ring that is attached to the mitral valve leaflets. Unlike prosthetic valves, it is neither circular nor continuous. The mitral annulus is saddle shaped and it is dynamic in shape throughout the cardiac cycle.^[1]The annulus contracts and reduces its surface area during systole to help provide complete closure of the leaflets. Annular dilatation can result in poor leaflet apposition, leading to functional mitral regurgitation. ^[2]

The normal diameter of the mitral annulus is 3.1 ± 0.4 cm, and the circumference is 8 to 9 cm. There is no histologic evidence of an annular structure anteriorly, where the mitral valve leaflet is contiguous with the posterior aortic root. ^[3]

Rarely there can be a severe form known as caseous calcification of the mitral valve that can be mistaken for intracardiac mass or thrombus.^[4]

References

^ Mahmood, Feroze; Shakil, Omair; Mahmood, Bilal; Chaudhry, Maria; Matyal, Robina; Khabbaz, Kamal R. (December 2013). "Mitral Annulus: An Intraoperative Echocardiographic Perspective". Journal of Cardiothoracic and Vascular Anesthesia 27 (6): 1355–1363. doi:10.1053/j.jvca.2013.02.008.
^ Perloff, JK; Roberts, WC (1972). "The mitral apparatus. Functional anatomy of mitral regurgitation". Circulation 46 (2): 227–39. doi:10.1161/01.cir.46.2.227.
^ Otto, Catherine M.; Robert Bonow (September 2009). Valvular Heart Disease: A Companion to Braunwald's Heart Disease: Expert Consult - Online and Print. Elsevier Health Sciences. ISBN 1-4160-5892-3.
^ Kosior, Dariusz A. (2014). "Mitral annulus caseous calcification mimicking cardiac mass in asymptomatic patient – multimodality imaging approach to incidental echocardiographic finding". Polish Journal of Radiology 79: 88–90. doi:10.12659/PJR.889830.

This medical treatment–related article is a stub. You can help Wikipedia by expanding it.

This cell biology article is a stub. You can help Wikipedia by expanding it.

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.

1. 僧帽弁輪石灰化 mitral annular calcification
2. 虚血性僧帽弁閉鎖不全症 ischemic mitral regurgitation
3. 僧帽弁逸脱の非不整脈合併症 nonarrhythmic complications of mitral valve prolapse
4. Pregnancy and valve disease
5. 僧帽弁逸脱の定義および診断 definition and diagnosis of mitral valve prolapse

English Journal

Robotic tissue tracking for beating heart mitral valve surgery.

Yuen SG, Vasilyev NV, Del Nido PJ, Howe RD.SourceHarvard School of Engineering and Applied Sciences, 29 Oxford Street, Cambridge, MA 02138, USA.
Medical image analysis.Med Image Anal.2013 Dec;17(8):1236-42. doi: 10.1016/j.media.2010.06.007. Epub 2010 Jul 6.
The rapid motion of the heart presents a significant challenge to the surgeon during intracardiac beating heart procedures. We present a 3D ultrasound-guided motion compensation system that assists the surgeon by synchronizing instrument motion with the heart. The system utilizes the fact that certa
PMID 23973122

Impact of aortic valve replacement for aortic stenosis on dynamic mitral annular motion and geometry.

Warraich HJ, Matyal R, Bergman R, Hess PE, Khabbaz K, Manning WJ, Mahmood F.SourceDepartment of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts.
The American journal of cardiology.Am J Cardiol.2013 Nov 1;112(9):1445-9. doi: 10.1016/j.amjcard.2013.06.013. Epub 2013 Jul 26.
The impact of aortic valve replacement (AVR) on the dynamic geometry and motion of the mitral annulus remains unknown. We analyzed the effects of AVR on the dynamic geometry and motion of the mitral annulus. We used 3-dimensional transesophageal echocardiography to analyze 39 consecutive patients un
PMID 23891429

Characterization of cardiovascular involvement in pseudoxanthoma elasticum families.

Campens L, Vanakker OM, Trachet B, Segers P, Leroy BP, De Zaeytijd J, Voet D, De Paepe A, De Backer T, De Backer J.SourceFrom the Center for Medical Genetics (L.C., O.M.V., B.P.L., A.D.P., J.D.B.), Department of Cardiology (T.D.B., J.D.B.), Department of Ophthalmology (B.P.L., J.D.Z.), and Department of Internal Medicine (D.V.), Ghent University Hospital, Ghent, Belgium; and Institute of Biomedical Technology, Ghent University, Ghent, Belgium (B.T., P.S.).
Arteriosclerosis, thrombosis, and vascular biology.Arterioscler Thromb Vasc Biol.2013 Nov;33(11):2646-52. doi: 10.1161/ATVBAHA.113.301901. Epub 2013 Aug 22.
OBJECTIVE: Pseudoxanthoma elasticum (PXE) is an autosomal recessive connective tissue disorder with involvement of the skin, the retina, and the cardiovascular system. Cardiovascular involvement is mainly characterized by mineralization and fragmentation of elastic fibers of blood vessels and premat
PMID 23968982