Tricuspid valve
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| Tricuspid valve | |
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| Mitral and tricuspid valves from atria. Normal valvular anatomy | |
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| Base of ventricles exposed by removal of the atria. (Tricuspid valve visible at bottom right.) | |
| Latin | valva atrioventricularis dextra, valvula tricuspidalis |
| Gray's | subject #138 531 |
| MeSH | Tricuspid+Valve |
| Dorlands/Elsevier | v_02/12843894 |
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The tricuspid valve is on the right side of the heart, between the right atrium and the right ventricle. The normal tricuspid valve usually has three leaflets and three papillary muscles. Tricuspid valves may also occur with two or four leaflets, and the number may change during life (Van Pragh, 1998).
Valves
- The largest cusp is interposed between the atrioventricular orifice and the conus arteriosus and is termed the anterior or infundibular cusp.
- A second, the posterior or marginal cusp, is in relation to the right margin of the ventricle.
- A third, the medial or septal cusp, to the ventricular septum.
- The tricuspid valve prevents the blood from returning to the right atrium when the right ventricle contracts
 Anterior (frontal) view of the opened heart. White arrows indicate normal blood flow. (Tricuspid valve labeled at bottom left.) |
Pathology
A small amount of leakage or regurgitation is not uncommon in the tricuspid valve. It is a common valve to be infected (endocarditis) in IV drug users.[1][2] Although it is not a common site of endocarditis, patients with a small VSD usually develop endocarditis of the tricuspid valve.
The tricuspid valve can be affected by rheumatic fever which can cause tricuspid stenosis or tricuspid insufficiency (also called tricuspid regurgitation).
Some patients are born with congenital abnormalities of the tricuspid valve. Congenital apical displacement of the tricuspid valve is called Ebstein's anomaly and typically causes significant tricuspid regurgitation.
The first endovascular tricuspid valve implant was performed by physicians at the Cleveland Clinic. [3]
Images
Images shown below are Courtesy of Professor Peter Anderson DVM PhD and Published with permission. © PEIR, University of Alabama at Birmingham, Department of Pathology
Mitral and tricuspid valves from atria. Normal valvular anatomy |
 Tricuspid valve. A close look up. |
 Tricuspid valve in an infant with hypoplastic right ventricle |
References
- ↑ Demin AA, Drobysheva VP, Vel'ter OIu (2000). "[Infectious endocarditis in intravenous drug abusers]" (in Russian). Klinicheskaia meditsina 78 (8): 47-51. PMID 11019526.
- ↑ Butany J, Dev V, Leong SW, Soor GS, Thangaroopan M, Borger MA (2006). "Infective endocarditis of the tricuspid valve". Journal of cardiac surgery 21 (6): 603-4. PMID 17073968.
- ↑ http://www.universitycircle.org/content/healthcare.asp
Additional reading
- Richard Van Pragh: Cardiac anatomy in A. C. Chang et al.: Pediatric Cardiac Intensive Care, Philadelphia 1998.
- Moss and Adams' Heart Disease in Infants, Children, and Adolescents Hugh D. Allen, Arthur J. Moss, David J. Driscoll, Forrest H. Adams, Timothy F. Feltes, Robert E. Shaddy, 2007 ISBN 0781786843
See also
External links
ja:三尖弁it:Valvola tricuspide nn:Trikuspidalklaff
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
