"Tricuspid" redirects here. For the type of tooth, see dental anatomy.
For the semilunar valves, the other two of the three heart valves that are usually tricuspid, see pulmonary valve and aortic valve.
The tricuspid valve, or right atrioventricular valve, is on the right dorsal side of the mammalian heart, at the superior portion of the right ventricle. The function of the valve is to allow blood to flow from the right atrium to the right ventricle during diastole, and to close to prevent backflow (regurgitation) from the right ventricle into the right atrium during right ventricular contraction (systole).
Tricuspid valve
Anterior (frontal) view of the opened heart. White arrows indicate normal blood flow. (Tricuspid valve labeled at bottom left.)
Heart in motion: the anterior walls of the ventricles are removed. The action of the tricuspid valve, located in the right ventricle, is seen on the left portion of this illustration. The three leaflets with their attached chordae tendineae and papillary muscles can be seen.
The tricuspid valve usually has three cusps or leaflets, named the anterior, posterior, and septal cusps.[1] Each leaflet is connected via chordae tendineae to the anterior, posterior, and septal papillary muscles of the right ventricle, respectively. Tricuspid valves may also occur with two or four leaflets; the number may change over a lifetime.[2]
The tricuspid valve functions as a one-way valve that closes during ventricular systole to prevent regurgitation of blood from the right ventricle back into the right atrium. It opens during ventricular diastole, allowing blood to flow from the right atrium into the right ventricle. The back flow of blood is also known as regression or tricuspid regurgitation. Tricuspid regurgitation can result in increased ventricular preload because the blood refluxed back into the atrium is added to the volume of blood that must be pumped back into the ventricle during the next cycle of ventricular diastole. Increased right ventricular preload over a prolonged period of time may lead to right ventricular enlargement (dilatation),[3] which can progress to right heart failure if left uncorrected.[4]
Clinical significanceedit
Video explanation of tricuspid valve disease
Infected valves can result in endocarditis in intravenous drug users.[5][6] Patients who inject narcotics or other drugs intravenously may introduce infection, which can travel to the right side of the heart, most often caused by the bacteriaS. aureus.[7] In patients without a history of intravenous exposure, endocarditis is more frequently left-sided.[7]
Tricuspid regurgitation is common and is estimated to occur in 65–85% of the population.[10] In the Framingham Heart Study presence of any severity of tricuspid regurgitation, ranging from trace to above moderate was in 82% of men and in 85.7% of women.[11] Mild tricuspid regurgitation tends to be common, benign, and in structurally normal tricuspid valve apparatus can be considered a normal variant.[10] Moderate or severe tricuspid regurgitation is usually associated with tricuspid valve leaflet abnormalities and/or possibly annular dilation and is usually pathologic which can lead to irreversible damage of cardiac muscle and worse outcomes due to chronic prolonged right ventricular volume overload.[10]
Additional imagesedit
Tricuspid valve. Deep dissection.
Tricuspid valve marked in yellow.
Diagram of tricuspid insufficiency/regurgitation. Marked in black arrow.
^"Anatomy of the Tricuspid Valve". e-echocardiography.com. Retrieved 2018-03-30.
^Richard Van Pragh: Cardiac anatomy in A. C. Chang et al.: Pediatric Cardiac Intensive Care, Philadelphia 1998.
^Reynertson, Sandra I.; Kundur, Ramesh; Mullen, G. Martin; Costanzo, Maria Rosa; McKiernan, Thomas L.; Louie, Eric K. (1999-08-03). "Asymmetry of Right Ventricular Enlargement in Response to Tricuspid Regurgitation". Circulation. 100 (5): 465–467. doi:10.1161/01.CIR.100.5.465. ISSN 0009-7322. PMID 10430758.
^"Enlarged heart - Symptoms and causes". Mayo Clinic. Retrieved 2018-03-30.
^Demin AA, Drobysheva VP, Vel'ter OIu (2000). "[Infectious endocarditis in intravenous drug abusers]". Klinicheskaia Meditsina (in Russian). 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. doi:10.1111/j.1540-8191.2006.00313.x. PMID 17073968. S2CID 32603989.
^ abMitchell RS, Kumar V, Robbins SL, Abbas AK, Fausto N (2007). Robbins Basic Pathology (8th ed.). Saunders/Elsevier. pp. 406–8. ISBN978-1-4160-2973-1.
Cardiac Valve Animations - Perioperative Interactive Education Group
January 01, 1970
tricuspid, valve, tricuspid, redirects, here, type, tooth, dental, anatomy, semilunar, valves, other, three, heart, valves, that, usually, tricuspid, pulmonary, valve, aortic, valve, tricuspid, valve, right, atrioventricular, valve, right, dorsal, side, mammal. Tricuspid redirects here For the type of tooth see dental anatomy For the semilunar valves the other two of the three heart valves that are usually tricuspid see pulmonary valve and aortic valve The tricuspid valve or right atrioventricular valve is on the right dorsal side of the mammalian heart at the superior portion of the right ventricle The function of the valve is to allow blood to flow from the right atrium to the right ventricle during diastole and to close to prevent backflow regurgitation from the right ventricle into the right atrium during right ventricular contraction systole Tricuspid valveAnterior frontal view of the opened heart White arrows indicate normal blood flow Tricuspid valve labeled at bottom left Heart in motion the anterior walls of the ventricles are removed The action of the tricuspid valve located in the right ventricle is seen on the left portion of this illustration The three leaflets with their attached chordae tendineae and papillary muscles can be seen DetailsIdentifiersLatinvalvula tricuspidalis valva atrioventricularis dextraMeSHD014261TA98A12 1 02 003TA23982FMA7234Anatomical terminology edit on Wikidata Contents 1 Structure 2 Function 3 Clinical significance 3 1 Tricuspid regurgitation 4 Additional images 5 See also 6 References 7 External linksStructure editSee also Heart valve The tricuspid valve usually has three cusps or leaflets named the anterior posterior and septal cusps 1 Each leaflet is connected via chordae tendineae to the anterior posterior and septal papillary muscles of the right ventricle respectively Tricuspid valves may also occur with two or four leaflets the number may change over a lifetime 2 Function editSee also Heart valves The tricuspid valve functions as a one way valve that closes during ventricular systole to prevent regurgitation of blood from the right ventricle back into the right atrium It opens during ventricular diastole allowing blood to flow from the right atrium into the right ventricle The back flow of blood is also known as regression or tricuspid regurgitation Tricuspid regurgitation can result in increased ventricular preload because the blood refluxed back into the atrium is added to the volume of blood that must be pumped back into the ventricle during the next cycle of ventricular diastole Increased right ventricular preload over a prolonged period of time may lead to right ventricular enlargement dilatation 3 which can progress to right heart failure if left uncorrected 4 Clinical significance edit source source source source source source source source Video explanation of tricuspid valve disease Infected valves can result in endocarditis in intravenous drug users 5 6 Patients who inject narcotics or other drugs intravenously may introduce infection which can travel to the right side of the heart most often caused by the bacteria S aureus 7 In patients without a history of intravenous exposure endocarditis is more frequently left sided 7 The tricuspid valve can be affected by rheumatic fever which can cause tricuspid stenosis or tricuspid regurgitation 8 Some individuals 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 Certain carcinoid syndromes can affect the tricuspid valve by producing fibrosis due to serotonin production by those tumors The first endovascular tricuspid valve implant was performed by surgeons at the Cleveland Clinic 9 Tricuspid regurgitation edit Main article Tricuspid regurgitation Tricuspid regurgitation is common and is estimated to occur in 65 85 of the population 10 In the Framingham Heart Study presence of any severity of tricuspid regurgitation ranging from trace to above moderate was in 82 of men and in 85 7 of women 11 Mild tricuspid regurgitation tends to be common benign and in structurally normal tricuspid valve apparatus can be considered a normal variant 10 Moderate or severe tricuspid regurgitation is usually associated with tricuspid valve leaflet abnormalities and or possibly annular dilation and is usually pathologic which can lead to irreversible damage of cardiac muscle and worse outcomes due to chronic prolonged right ventricular volume overload 10 Additional images edit nbsp Tricuspid valve Deep dissection nbsp Tricuspid valve marked in yellow nbsp Diagram of tricuspid insufficiency regurgitation Marked in black arrow See also editTricuspid atresia Cavo tricuspid isthmus Lancisi s sign Right atrial enlargementReferences edit Anatomy of the Tricuspid Valve e echocardiography com Retrieved 2018 03 30 Richard Van Pragh Cardiac anatomy in A C Chang et al Pediatric Cardiac Intensive Care Philadelphia 1998 Reynertson Sandra I Kundur Ramesh Mullen G Martin Costanzo Maria Rosa McKiernan Thomas L Louie Eric K 1999 08 03 Asymmetry of Right Ventricular Enlargement in Response to Tricuspid Regurgitation Circulation 100 5 465 467 doi 10 1161 01 CIR 100 5 465 ISSN 0009 7322 PMID 10430758 Enlarged heart Symptoms and causes Mayo Clinic Retrieved 2018 03 30 Demin AA Drobysheva VP Vel ter OIu 2000 Infectious endocarditis in intravenous drug abusers Klinicheskaia Meditsina in Russian 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 doi 10 1111 j 1540 8191 2006 00313 x PMID 17073968 S2CID 32603989 a b Mitchell RS Kumar V Robbins SL Abbas AK Fausto N 2007 Robbins Basic Pathology 8th ed Saunders Elsevier pp 406 8 ISBN 978 1 4160 2973 1 Tricuspid valve disease Mount Sinai Hospital New York University Circle Inc Archived 2008 06 17 at the Wayback Machine a b c Arsalan Mani Walther Thomas Smith Robert L Grayburn Paul A 2015 09 10 Tricuspid regurgitation diagnosis and treatment European Heart Journal 38 9 634 638 doi 10 1093 eurheartj ehv487 ISSN 0195 668X PMID 26358570 Prihadi Edgard A Tricuspid valve regurgitation no longer the forgotten valve www escardio org Retrieved 2021 11 27 External links editAnatomy figure 20 07 04 at Human Anatomy Online SUNY Downstate Medical Center Photo of model circulation tricuspidvalve04 at Waynesburg College Cardiac Valve Animations Perioperative Interactive Education Group Retrieved from https en wikipedia org w index php title Tricuspid valve amp oldid 1222375275, wikipedia, wiki, book, books, library,
