Tricuspid valve - wikipedia Tricuspid valve `` Tricuspid '' redirects here. For the type of tooth, see dental anatomy. Tricuspid valve Anterior ( frontal ) view of the opened heart. White arrows indicate normal blood flow. ( Tricuspid valve labeled at bottom left. ) Base of ventricles exposed by removal of the atria. ( Tricuspid valve visible at bottom right. ) Details Identifiers Latin Valvula tricuspidalis, valva atrioventricularis dextra MeSH D014261 TA A12. 1.02. 003 FMA 7234 Anatomical terminology ( edit on Wikidata ) The tricuspid valve, or right atrioventricular valve, is on the right dorsal side of the mammalian heart, between the right atrium and the right ventricle. The function of the valve is to prevent back flow of blood from the right ventricle into the right atrium. Contents 1 Structure 2 Function 3 Clinical significance 4 Additional images 5 References 6 External links Structure The normal tricuspid valve usually has three leaflets, named the anterior, posterior, and septal leaflets. 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. Function See 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 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 ), which can progress to right heart failure if left uncorrected. Clinical significance Tricuspid regurgitation is not uncommon. Infected valves can result in endocarditis in intravenous drug users. 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. In patients without a history of intravenous exposure, endocarditis is more frequently left - sided. The tricuspid valve can be affected by rheumatic fever, which can cause tricuspid stenosis or tricuspid insufficiency ( also called tricuspid regurgitation ). 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. Additional images Tricuspid valve. Deep dissection. References Jump up ^ `` Anatomy of the Tricuspid Valve ''. e-echocardiography.com. Retrieved 2018 - 03 - 30. Jump up ^ Richard Van Pragh : Cardiac anatomy in A.C. Chang et al. : Pediatric Cardiac Intensive Care, Philadelphia 1998. Jump up ^ Healthline Editorial Team. `` Right atrioventricular valve ( Tricuspid valve ) ''. Healthline. Jump up ^ 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. Jump up ^ `` Enlarged heart - Symptoms and causes ''. Mayo Clinic. Retrieved 2018 - 03 - 30. Jump up ^ Demin AA, Drobysheva VP, Vel'ter OIu ( 2000 ). `` ( Infectious endocarditis in intravenous drug abusers ) ''. Klinicheskaia meditsina ( in Russian ). 78 ( 8 ) : 47 -- 51. PMID 11019526. Jump up ^ 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. ^ Jump up to : Mitchell RS, Kumar V, Robbins SL, Abbas AK, Fausto N ( 2007 ). Robbins Basic Pathology ( 8th ed. ). Saunders / Elsevier. pp. 406 -- 8. ISBN 1 - 4160 - 2973 - 7. Jump up ^ Tricuspid valve disease Mount Sinai Hospital, New York Jump up ^ University Circle Inc. Archived 2008 - 06 - 17 at the Wayback Machine. External links Anatomy 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 hide Anatomy of the heart General Surface base apex sulci coronary interatrial anterior interventricular posterior interventricular borders right left 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, crista supraventricularis ), → 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 heart valves Myocardium Conduction system cardiac pacemaker SA node Bachmann 's bundle AV node bundle of His bundle branches Purkinje fibers Pericardial cavity pericardial sinus Pericardium fibrous pericardium sternopericardial ligaments serous pericardium epicardium / visceral layer fold of left vena cava Blood supply Circulatory system Coronary circulation Coronary arteries Retrieved from `` https://en.wikipedia.org/w/index.php?title=Tricuspid_valve&oldid=849483973 '' Categories : Cardiac anatomy Heart valves Hidden categories : Pages with unresolved properties CS1 Russian - language sources ( ru ) Webarchive template wayback links Talk Contents About Wikipedia Azərbaycanca Bosanski Català Čeština Deutsch Emiliàn e rumagnòl فارسی Français Galego 한국어 Italiano Nederlands 日本 語 Norsk nynorsk Polski Português Русский Українська 中文 11 more Edit links This page was last edited on 9 July 2018, at 09 : 54 ( UTC ). 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Question: which side of the heart is the tricuspid valve
Answer: right dorsal side