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Atrium (heart)

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704: 42: 433: 802:. Among sharks, the heart consists of four parts arranged serially: blood flows into the most posterior part, the sinus venosus, and then to the atrium which moves it to the third part, the ventricle, before it reaches the conus anteriosus, which itself is connected to the ventral aorta. This is considered a primitive arrangement, and many vertebrates have condensed the atrium with the sinus venosus and the ventricle with the conus anteriosus. 271: 1844: 643:. (3) The atrial contractions must be gentle enough so that the force of contraction does not exert significant back pressure that would impede venous flow. (4) The "let go" of the atria must be timed so that they relax before the start of ventricular contraction, to be able to accept venous flow without interruption. 790:
Many other animals, including mammals, also have four-chambered hearts, which have a similar function. Some animals (amphibians and reptiles) have a three-chambered heart, in which the blood from each atrium is mixed in the single ventricle before being pumped to the aorta. In these animals, the left
588:, which provides access to the left atrium; this connects the two chambers, which is essential for fetal blood circulation. At birth, when the first breath is taken fetal blood flow is reversed to travel through the lungs. The foramen ovale is no longer needed and it closes to leave a depression (the 456:
is characterized as being in one of four groups: windsock, cactus, cauliflower, and chicken wing. The LAA appears to "function as a decompression chamber during left ventricular systole and during other periods when left atrial pressure is high". It also modulates intravascular volume by secreting
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to the heart that would occur during ventricular systole if the veins ended at the inlet valves of the heart. In normal physiologic states, the output of the heart is pulsatile, and the venous inflow to the heart is continuous and non-pulsatile. But without functioning atria, venous flow becomes
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Atria have four essential characteristics that cause them to promote continuous venous flow. (1) There are no atrial inlet valves to interrupt blood flow during atrial systole. (2) The atrial systole contractions are incomplete and thus do not contract to the extent that would block flow from the
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By preventing the inertia of interrupted venous flow that would otherwise occur at each ventricular systole, atria allow approximately 75% more cardiac output than would otherwise occur. The fact that atrial contraction is 15% of the amount of the succeeding ventricular ejection has led to a
1711:"Images in cardiovascular medicine. The case of a disappearing left atrial appendage thrombus: direct visualization of left atrial thrombus migration, captured by echocardiography, in a patient with atrial fibrillation, resulting in a stroke" 813:, the ventricle is almost entirely divided by a septum, but retains an opening through which some mixing of blood occurs. In birds, mammals, and some other reptiles (alligators in particular) the partitioning of both chambers is complete. 647:
misplaced emphasis on their role in pumping up the ventricles (the so-called "atrial kick"), whereas the key benefit of atria is in preventing circulatory inertia and allowing uninterrupted venous flow to the heart.
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Within the fetal right atrium, blood from the inferior vena cava and the superior vena cava flow in separate streams to different locations in the heart; this has been reported to occur through the
376:(lat: auricula atrii dextra) is located at the front upper surface of the right atrium. Looking from the front, the right atrial appendage appears wedge-shaped or triangular. Its base surrounds the 281:
Humans have a four-chambered heart consisting of the right and left atrium, and the right and left ventricle. The atria are the two upper chambers which pump blood to the two lower ventricles.
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to move blood to the ventricles. Each atrium is roughly cube-shaped except for an ear-shaped projection called an atrial appendage, previously known as an auricle. All animals with a
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veins through the atria into the ventricles. During atrial systole, blood not only empties from the atria to the ventricles, but blood continues to flow uninterrupted from the
480:. The left atrial appendage can serve as an approach for mitral valve surgery. The body of the left atrial appendage is anterior to the left atrium and parallel to the left 476:
The left atrial appendage can be seen on a standard posteroanterior X-ray, where the lower level of the left hilum becomes concave. It can also be seen clearly using
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In some cases, the foramen ovale fails to close. This abnormality is present in approximately 25% of the general population. This is known as a
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results in the flow of blood in the reverse direction – from the left atrium to the right – which reduces cardiac output, potentially causing
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The atrium was formerly called the 'auricle'. That term is still used to describe this chamber in some other animals, such as the
1932: 856:"Recording of blood pressure from the left auricle and the pulmonary veins in human subjects with interauricular septal defect" 731: 557: 501: 743: 492:, the left atrial appendage fibrillates rather than contracts resulting in blood stasis that predisposes to the formation of 477: 1343:
Naksuk, Niyada; Padmanabhan, Deepak; Yogeswaran, Vidhushei; Asirvatham, Samuel J. (August 2016). "Left Atrial Appendage".
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In human physiology, the atria facilitate circulation primarily by allowing uninterrupted venous flow to the heart during
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then spreads across both atria causing them to contract, forcing the blood they hold into their corresponding ventricles.
136: 769: 466: 2339: 2116: 1869: 1632:(video produced by University of Arizona Biomedical Communications; demonstration of atrial effect begings at 13:43). 522:(SA node) is located in the posterior aspect of the right atrium, next to the superior vena cava. This is a group of 380:. The right atrial appendage is a pouch-like extension of the right atrium and is covered by a trabecula network of 809:, the oxygenated and deoxygenated blood is mixed in the ventricle before being pumped out to the body's organs; in 462: 2140: 538: 513: 250: 662:
when a drop in atrial pressure (which indicates a drop in blood volume) is detected. This triggers a release of
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may be performed at the time of any open-heart surgery to prevent future clot formation within the appendage.
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CT scan of the chest showing a thrombus in the left atrial appendage (left: axial plane, right: coronal plane)
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separates the right atrium from the left atrium; this is marked by a depression in the right atrium – the
345: 341: 209: 148: 120: 108: 41: 1710: 994:"A comprehensive review of the anatomical variations in the right atrium and their clinical significance" 2281: 2186: 2154: 2028: 1947: 585: 534: 361: 226: 484:. The left pulmonary artery passes posterosuperiorly and is separated from the atrial appendage by the 805:
With the advent of lungs came a partitioning of the atrium into two parts divided by a septum. Among
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Radakovic D, Penov K, Lazarus M, Madrahimov N, Hamouda K, Schimmer C, Leyh RG, Bening C (June 2023).
692: 680: 600: 589: 421: 389: 234: 1449:(6th ed.). Philadelphia: Wolters Kluwer Health/Lippincott Williams & Wilkins. p. 145. 1046: 2334: 1917: 712: 569: 489: 458: 320:. The sinus venarum is the adult remnant of the sinus venosus and it surrounds the openings of the 179: 560:
is partly responsible for venous drainage; it derives from the embryonic left superior vena cava.
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Edgerton JR (2020). "Current State of Surgical Left Atrial Appendage Exclusion: How and When".
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begins to be formed as one chamber, which over the following two weeks becomes divided by the
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Shereen, Rafik; Lee, Sang; Salandy, Sonja; Roberts, Wallisa; Loukas, Marios (November 2019).
2150: 2046: 2016: 1773: 1763: 1722: 1604: 1541: 1504: 1486: 1409: 1399: 1352: 1315: 1274: 1264: 1172: 1164: 1122: 1085: 1075: 1005: 867: 829: 798:, the circulatory system is very simple: a two-chambered heart including one atrium and one 611: 573: 357: 2296: 2291: 2271: 2144: 2128: 2124: 1922: 1629: 684: 519: 409: 353: 309: 262:. Auricles in this modern terminology are distinguished by having thicker muscular walls. 216: 1304:"Mitral valve reoperation through the left atrial appendage in a patient with mesocardia" 1253:"The completeness of the left atrial appendage amputation during routine cardiac surgery" 1279: 1252: 2253: 2194: 2176: 2090: 1509: 1474: 1177: 1152: 1090: 1063: 748: 688: 481: 470: 393: 349: 170: 1727: 1532:
Ashrafian H (July 2006). "The Coanda effect and preferential right atrial streaming".
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have a tendency to form in the left atrial appendage. The clots may dislodge (forming
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damage to the brain, kidneys, or other organs supplied by the systemic circulation.
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There are two atria in the human heart – the left atrium receives blood from the
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High in the upper part of the left atrium is a muscular ear-shaped pouch – the
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atrium still serves the purpose of collecting blood from the pulmonary veins.
626:. By being partially empty and distensible, atria prevent the interruption of 289: 1500: 938: 603:. It is mostly unproblematic, although it can be associated with paradoxical 129: 125: 1709:
Parekh A, Jaladi R, Sharma S, Van Decker WA, Ezekowitz MD (September 2006).
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risk, surgeons may choose to close it during open-heart surgery, using a
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and the coronary sinus. Attached to each atrium is an atrial appendage.
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The left atrium receives the oxygenated blood from the left and right
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Also of importance in maintaining the blood flow are the presence of
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pulsatile, and the overall circulation rate decreases significantly.
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The right atrium and ventricle are often referred to together as the
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Clinical Methods: The History, Physical, and Laboratory Examinations
941:. In Walker, H. Kenneth; Hall, W. Dallas; Hurst, J. Willis (eds.). 2208: 1886: 702: 526:
which spontaneously depolarize to create an action potential. The
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The right atrium receives and holds deoxygenated blood from the
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The Gross Physiology of the Cardiovascular System (2nd ed.)
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Doris R. Helms; Carl W. Helms; Robert J. Kosinski (1997).
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Guhathakurta S, Kurian VM, Manmohan G, Cherian KM (2004).
416:(left atrioventricular valve) for pumping out through the 1445:
Keith L. Moore; Arthur F. Dalley; Anne M.R. Agur (2010).
541:. This is located between the atria and the ventricles. 1688:(7th revised ed.). Cengage Learning. p. 567. 1203:
Arora, Yingyot; Jozsa, Felix; Soos, Michael P. (2023),
1583: 1581: 1579: 448:) (lat: auricula atrii sinistra), which has a tubular 277:
anatomy, right ventricle seen on right of illustration
1671:. Robert M. Anderson. 1999 – via Google Books. 412:, which it pumps to the left ventricle (through the 2371: 2325: 2307: 2252: 2234: 2227: 2165: 2075: 2068: 1963: 1900: 1893: 1815:
Biology in the Laboratory: With BioBytes 3.1 CD-ROM
1669:"The Gross Physiology of the Cardiovascular System" 135: 119: 107: 95: 83: 78: 66: 56: 51: 34: 730:In those with uncontrollable atrial fibrillation, 1807: 1805: 1569:The Gross Physiology of the Cardiovascular System 1588:Anderson R.M.; Fritz J.M.; O'Hare J.E. (1967). 1211:, Treasure Island (FL): StatPearls Publishing, 939:"The Jugular Venous Pressure and Pulse Contour" 920:"Jugular Venous Pressure: Causes and Prognosis" 580:into the left atrium and the right atrium. The 473:, where they enter into the blood circulation. 229:, and the right atrium receives blood from the 1642:Discussion of atrial effect in text Chapter 1. 1590:"The Mechanical Nature of the Heart as a Pump" 1205:"Anatomy, Thorax, Heart Left Atrial Appendage" 1057: 1055: 866:(2). American Journal of Physiology: 267–271. 860:American Journal of Physiology. Legacy Content 715:, mitral valve disease, and other conditions, 1870: 8: 1468: 1466: 204:. The blood in the atria is pumped into the 1146: 1144: 288:, and the left atrium and ventricle as the 241:, the atria receive blood while relaxed in 2231: 2072: 1967: 1897: 1877: 1863: 1855: 1750:Whitlock, Richard P.; et al. (2021). 1386:Whitlock, Richard P.; et al. (2021). 903:. American Heart Association. 8 May 2020. 549:The left atrium is supplied mainly by the 436:Left atrial appendage shown at upper right 40: 1777: 1767: 1726: 1508: 1490: 1413: 1403: 1319: 1278: 1268: 1176: 1089: 1079: 1009: 986: 984: 1062:Srivastava MC, See VY, Price MJ (2015). 658:in the atria, which send signals to the 584:has an opening in the right atrium, the 1685:Human physiology: From cells to systems 846: 2137:moderator band/septomarginal trabecula 152: 31: 1198: 1196: 452:structure. LAA anatomy as seen in a 46:Front view of heart showing the atria 7: 1658:See "Chapter 1: Normal Physiology." 1573:See "Chapter 1: Normal Physiology." 687:, and in severe or untreated cases 185: 1630:The Determinants of Cardiac Output 907:from the original on 20 June 2010. 300:. Internally, there are the rough 25: 1728:10.1161/CIRCULATIONAHA.106.617886 1492:10.1161/CIRCULATIONAHA.104.524371 1475:"Patent Foramen Ovale and Stroke" 1151:Al-Saady NM; et al. (1999). 1115:Cardiac Electrophysiology Clinics 998:Translational Research in Anatomy 901:"Roles of Your Four Heart Valves" 639:right through the atria into the 537:(AV node) is another node in the 1842: 1345:JACC: Clinical Electrophysiology 918:Tidy, Colin (20 December 2021). 872:10.1152/ajplegacy.1947.150.2.267 699:Left atrial appendage thrombosis 478:transesophageal echocardiography 463:atrial natriuretic peptide (ANP) 356:, which in turn sends it to the 1756:New England Journal of Medicine 1392:New England Journal of Medicine 732:left atrial appendage occlusion 558:oblique vein of the left atrium 551:left circumflex coronary artery 502:left atrial appendage occlusion 467:brain natriuretic peptide (BNP) 744:Wolff-Parkinson-White syndrome 1: 1818:. W. H. Freeman. p. 36. 1308:Texas Heart Institute Journal 764:Multifocal atrial tachycardia 316:, which are derived from the 200:that receives blood from the 1609:10.1016/0002-8703(67)90313-4 1257:BMC Cardiovascular Disorders 1047:Human heart anatomy diagram. 786:Amphibian Β§ Circulation 770:Premature atrial contraction 2340:sternopericardial ligaments 2117:valve of inferior vena cava 1682:Sherwood, Lauralee (2008). 1447:Clinically oriented anatomy 1357:10.1016/j.jacep.2016.06.006 1236:Corne; et al. (2002). 937:Applefeld, Mark M. (1990). 2426: 1938:posterior interventricular 1270:10.1186/s12872-023-03330-8 1127:10.1016/j.ccep.2019.10.001 1011:10.1016/j.tria.2019.100046 820: 779: 553:, and its small branches. 511: 253:have at least one atrium. 2352:epicardium/visceral layer 2141:crista supraventricularis 2042: 1970: 1933:anterior interventricular 1081:10.1186/s40064-015-1289-8 654:. These are low-pressure 539:cardiac conduction system 514:Cardiac conduction system 496:. Because of consequent 251:closed circulatory system 147: 39: 1240:. Churchill Livingstone. 1049:Retrieved on 2010-07-02. 1034:"Structure of the Heart" 738:Functional abnormalities 528:cardiac action potential 2121:valve of coronary sinus 2034:atrioventricular septum 2002:interventricular septum 1546:10.1378/chest.130.1.300 782:Fish Β§ Circulation 652:atrial volume receptors 298:jugular venous pressure 27:Part of the human heart 2359:fold of left vena cava 2109:limbus of fossa ovalis 1597:American Heart Journal 975:"Embryo Images Online" 823:anatomical terminology 708: 592:) in the atrial wall. 572:at about two weeks, a 437: 374:right atrial appendage 368:Right atrial appendage 346:smallest cardiac veins 342:anterior cardiac veins 278: 184:'entry hall'; 174: 149:Anatomical terminology 2155:pulmonary circulation 1769:10.1056/NEJMoa2101897 1405:10.1056/NEJMoa2101897 1238:Chest X-Ray Made Easy 723:), which may lead to 706: 535:atrioventricular node 442:left atrial appendage 435: 428:Left atrial appendage 362:pulmonary circulation 273: 227:pulmonary circulation 2384:Coronary circulation 2213:systemic circulation 2052:intervenous tubercle 1851:at Wikimedia Commons 1169:10.1136/hrt.82.5.547 854:Cournand, A (1947). 681:atrial septal defect 675:Atrial septal defect 601:atrial septal defect 597:patent foramen ovale 459:natriuretic peptides 422:systemic circulation 235:systemic circulation 192:) is one of the two 2335:fibrous pericardium 713:atrial fibrillation 624:ventricular systole 490:atrial fibrillation 245:, then contract in 2379:Circulatory system 2347:serous pericardium 2309:Pericardial cavity 2007:trabeculae carneae 1980:interatrial septum 1473:Homma, S. (2005). 835:Left atrial volume 821:This article uses 754:Atrial tachycardia 709: 582:interatrial septum 438: 386:interatrial septum 378:superior vena cava 338:inferior vena cava 334:superior vena cava 279: 202:circulatory system 73:Circulatory system 2397: 2396: 2389:Coronary arteries 2367: 2366: 2317:pericardial sinus 2277:Bachmann's bundle 2267:cardiac pacemaker 2262:Conduction system 2223: 2222: 2113:crista terminalis 2064: 2063: 2060: 2059: 2012:chordae tendineae 1985:pectinate muscles 1847:Media related to 1762:(22): 2081–2091. 1398:(22): 2081–2091. 759:Sinus tachycardia 711:In patients with 508:Conduction system 382:pectinate muscles 306:crista terminalis 302:pectinate muscles 183: 163: 162: 158: 16:(Redirected from 2417: 2232: 2187:atrial appendage 2151:pulmonary artery 2101:atrial appendage 2073: 2047:cardiac skeleton 2017:papillary muscle 1968: 1898: 1879: 1872: 1865: 1856: 1846: 1830: 1829: 1809: 1800: 1799: 1781: 1771: 1747: 1741: 1740: 1730: 1721:(13): e513–514. 1706: 1700: 1699: 1679: 1673: 1672: 1665: 1659: 1650: 1644: 1639: 1633: 1627: 1621: 1620: 1594: 1585: 1574: 1571:(2nd ed., 2012). 1564: 1558: 1557: 1529: 1523: 1522: 1512: 1494: 1485:(7): 1063–1072. 1470: 1461: 1460: 1442: 1436: 1435: 1417: 1407: 1383: 1377: 1376: 1340: 1334: 1333: 1323: 1299: 1293: 1292: 1282: 1272: 1248: 1242: 1241: 1233: 1227: 1226: 1225: 1223: 1200: 1191: 1190: 1180: 1148: 1139: 1138: 1110: 1104: 1103: 1093: 1083: 1059: 1050: 1044: 1038: 1037: 1030: 1024: 1023: 1013: 988: 979: 978: 971: 965: 964: 945:. Butterworths. 934: 928: 927: 915: 909: 908: 897: 891: 890: 888: 886: 851: 830:Atrial syncytium 679:In an adult, an 574:primitive atrium 486:transverse sinus 392:. The atria are 358:pulmonary artery 210:atrioventricular 206:heart ventricles 187: 178: 155:edit on Wikidata 142:7099 85574, 7099 44: 32: 21: 18:Atrium (anatomy) 2425: 2424: 2420: 2419: 2418: 2416: 2415: 2414: 2410:Cardiac anatomy 2400: 2399: 2398: 2393: 2363: 2321: 2303: 2297:Purkinje fibers 2292:bundle branches 2248: 2219: 2177:pulmonary veins 2161: 2145:pulmonary valve 2129:right ventricle 2125:tricuspid valve 2056: 2038: 1990:terminal sulcus 1959: 1889: 1885:Anatomy of the 1883: 1839: 1834: 1833: 1826: 1811: 1810: 1803: 1749: 1748: 1744: 1708: 1707: 1703: 1696: 1681: 1680: 1676: 1667: 1666: 1662: 1651: 1647: 1640: 1636: 1628: 1624: 1592: 1587: 1586: 1577: 1565: 1561: 1531: 1530: 1526: 1472: 1471: 1464: 1457: 1444: 1443: 1439: 1385: 1384: 1380: 1342: 1341: 1337: 1301: 1300: 1296: 1250: 1249: 1245: 1235: 1234: 1230: 1221: 1219: 1202: 1201: 1194: 1150: 1149: 1142: 1112: 1111: 1107: 1061: 1060: 1053: 1045: 1041: 1032: 1031: 1027: 991: 989: 982: 973: 972: 968: 953: 936: 935: 931: 917: 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1919: 1916: 1914: 1911: 1909: 1906: 1905: 1903: 1899: 1896: 1892: 1888: 1880: 1875: 1873: 1868: 1866: 1861: 1860: 1857: 1850: 1845: 1841: 1840: 1836: 1827: 1821: 1817: 1816: 1808: 1806: 1802: 1797: 1793: 1789: 1785: 1780: 1779:10044/1/89235 1775: 1770: 1765: 1761: 1757: 1753: 1746: 1743: 1738: 1734: 1729: 1724: 1720: 1716: 1712: 1705: 1702: 1697: 1691: 1687: 1686: 1678: 1675: 1670: 1664: 1661: 1657: 1656: 1649: 1646: 1643: 1638: 1635: 1631: 1626: 1623: 1618: 1614: 1610: 1606: 1603:(1): 92–105. 1602: 1598: 1591: 1584: 1582: 1580: 1576: 1572: 1570: 1563: 1560: 1555: 1551: 1547: 1543: 1539: 1535: 1528: 1525: 1520: 1516: 1511: 1506: 1502: 1498: 1493: 1488: 1484: 1480: 1476: 1469: 1467: 1463: 1458: 1456:9780781775250 1452: 1448: 1441: 1438: 1433: 1429: 1425: 1421: 1416: 1415:10044/1/89235 1411: 1406: 1401: 1397: 1393: 1389: 1382: 1379: 1374: 1370: 1366: 1362: 1358: 1354: 1350: 1346: 1339: 1336: 1331: 1327: 1322: 1317: 1313: 1309: 1305: 1298: 1295: 1290: 1286: 1281: 1276: 1271: 1266: 1262: 1258: 1254: 1247: 1244: 1239: 1232: 1229: 1218: 1214: 1210: 1206: 1199: 1197: 1193: 1188: 1184: 1179: 1174: 1170: 1166: 1162: 1158: 1154: 1147: 1145: 1141: 1136: 1132: 1128: 1124: 1120: 1116: 1109: 1106: 1101: 1097: 1092: 1087: 1082: 1077: 1073: 1069: 1065: 1058: 1056: 1052: 1048: 1043: 1040: 1035: 1029: 1026: 1021: 1017: 1012: 1007: 1003: 999: 995: 987: 985: 981: 976: 970: 967: 962: 958: 954: 952:9780409900774 948: 944: 940: 933: 930: 925: 921: 914: 911: 906: 902: 896: 893: 881: 877: 873: 869: 865: 861: 857: 850: 847: 840: 836: 833: 831: 828: 827: 824: 816: 814: 812: 808: 803: 801: 797: 792: 787: 783: 776:Other animals 775: 771: 768: 765: 762: 760: 757: 755: 752: 750: 747: 745: 742: 741: 737: 735: 733: 728: 726: 722: 718: 714: 705: 698: 696: 694: 690: 686: 682: 674: 669: 667: 665: 661: 657: 656:baroreceptors 653: 648: 644: 642: 638: 632: 629: 625: 617: 615: 613: 612:CoandΔƒ effect 608: 606: 602: 598: 593: 591: 587: 586:foramen ovale 583: 579: 578:septum primum 575: 571: 570:embryogenesis 563: 561: 559: 554: 552: 544: 542: 540: 536: 531: 529: 525: 521: 515: 507: 505: 503: 499: 495: 491: 487: 483: 479: 474: 472: 468: 464: 460: 455: 451: 447: 443: 434: 427: 425: 423: 419: 415: 411: 403: 401: 399: 395: 391: 387: 383: 379: 375: 367: 365: 363: 359: 355: 351: 347: 343: 339: 335: 327: 325: 323: 319: 318:sinus venosus 315: 314:sinus venarum 311: 307: 303: 299: 295: 291: 287: 282: 276: 272: 265: 263: 261: 260: 254: 252: 248: 244: 240: 239:cardiac cycle 237:. During the 236: 232: 228: 223: 221: 218: 214: 211: 207: 203: 199: 195: 191: 181: 176: 172: 168: 156: 150: 146: 143: 140: 138: 134: 131: 127: 124: 122: 118: 115: 112: 110: 106: 103: 100: 98: 94: 91: 88: 86: 82: 77: 74: 71: 69: 65: 62: 59: 55: 50: 43: 38: 33: 30: 19: 2372:Blood supply 2244:heart valves 2206: 2203:aortic sinus 2199:aortic valve 2191:mitral valve 2174: 2148: 2133:infundibulum 2105:fossa ovalis 2097:right atrium 2084: 1974: 1814: 1759: 1755: 1745: 1718: 1714: 1704: 1684: 1677: 1663: 1654: 1648: 1637: 1625: 1600: 1596: 1568: 1562: 1537: 1533: 1527: 1482: 1478: 1446: 1440: 1395: 1391: 1381: 1348: 1344: 1338: 1311: 1307: 1297: 1260: 1256: 1246: 1237: 1231: 1220:, retrieved 1208: 1160: 1156: 1118: 1114: 1108: 1071: 1068:SpringerPlus 1067: 1042: 1028: 1001: 997: 969: 942: 932: 923: 913: 895: 883:. Retrieved 863: 859: 849: 804: 793: 789: 729: 710: 693:sudden death 678: 660:hypothalamus 649: 645: 633: 621: 609: 607:and stroke. 605:embolization 596: 594: 590:fossa ovalis 567: 555: 548: 545:Blood supply 532: 517: 475: 450:trabeculated 445: 441: 439: 414:mitral valve 407: 390:fossa ovalis 373: 371: 331: 328:Right atrium 313: 294:jugular vein 283: 280: 257: 255: 224: 220:heart valves 208:through the 189: 166: 164: 114:A12.1.00.017 89: 29: 2327:Pericardium 2236:Endocardium 2183:left atrium 2087:venae cavae 2077:Right heart 1928:interatrial 1849:Heart atria 1715:Circulation 1479:Circulation 717:blood clots 664:vasopressin 628:venous flow 564:Development 504:procedure. 494:blood clots 404:Left atrium 394:depolarised 322:venae cavae 286:right heart 275:Right heart 231:venae cavae 79:Identifiers 2254:Myocardium 2167:Left heart 1997:ventricles 1540:(1): 300. 1263:(1): 308. 1222:24 October 1209:StatPearls 1004:: 100046. 841:References 780:See also: 641:ventricles 304:, and the 290:left heart 1796:234747730 1501:0009-7322 1432:234747730 1020:202002161 800:ventricle 670:Disorders 469:into the 461:, namely 266:Structure 217:tricuspid 2404:Category 2069:Chambers 1964:Internal 1944:borders 1923:coronary 1788:33999547 1737:17000914 1554:16840419 1519:16103257 1424:33999547 1373:46891270 1365:29759858 1330:15562857 1289:37340354 1280:10283164 1217:31985999 1187:10525506 1135:32067640 1100:26405642 961:21250143 905:Archived 885:20 March 880:20258383 817:See also 794:In most 725:ischemic 618:Function 348:and the 259:Mollusca 243:diastole 2282:AV node 2272:SA node 1901:Surface 1894:General 1617:6016029 1510:3723385 1178:1760793 1091:4574041 1074:: 522. 924:Patient 811:turtles 568:During 454:CT scan 398:calcium 296:as the 247:systole 233:of the 196:in the 182:  102:D006325 57:Part of 52:Details 2228:Layers 2143:), β†’ 2024:valves 1822:  1794:  1786:  1735:  1692:  1615:  1552:  1517:  1507:  1499:  1453:  1430:  1422:  1371:  1363:  1328:  1321:521780 1318:  1287:  1277:  1215:  1185:  1175:  1133:  1098:  1088:  1018:  959:  949:  878:  784:, and 721:emboli 498:stroke 465:, and 384:. The 213:mitral 175:ātrium 167:atrium 90:atrium 68:System 35:Atrium 2209:aorta 2189:) β†’ 2029:cusps 1975:atria 1948:right 1918:sulci 1887:heart 1792:S2CID 1593:(PDF) 1534:Chest 1428:S2CID 1369:S2CID 1157:Heart 1016:S2CID 807:frogs 637:veins 599:, an 488:. In 418:aorta 198:heart 190:atria 171:Latin 153:[ 85:Latin 61:Heart 2211:and 2205:) β†’ 2153:and 2123:) β†’ 1953:left 1913:apex 1908:base 1820:ISBN 1784:PMID 1733:PMID 1690:ISBN 1613:PMID 1550:PMID 1515:PMID 1497:ISSN 1451:ISBN 1420:PMID 1361:PMID 1326:PMID 1285:PMID 1224:2023 1213:PMID 1183:PMID 1131:PMID 1096:PMID 990:> 957:PMID 947:ISBN 887:2022 876:PMID 796:fish 691:and 556:The 533:The 518:The 420:for 372:The 360:for 215:and 180:lit. 165:The 130:4054 126:4022 109:TA98 97:MeSH 1774:hdl 1764:doi 1760:384 1723:doi 1719:114 1605:doi 1542:doi 1538:130 1505:PMC 1487:doi 1483:112 1410:hdl 1400:doi 1396:384 1353:doi 1316:PMC 1275:PMC 1265:doi 1173:PMC 1165:doi 1123:doi 1086:PMC 1076:doi 1006:doi 868:doi 864:150 446:LAA 396:by 310:His 308:of 186:pl. 137:FMA 121:TA2 2406:: 2197:β†’ 2193:β†’ 2181:β†’ 2147:β†’ 2139:, 2135:, 2127:β†’ 2119:, 2115:, 2111:, 2107:, 2103:, 2095:β†’ 2089:, 1804:^ 1790:. 1782:. 1772:. 1758:. 1754:. 1731:. 1717:. 1713:. 1611:. 1601:73 1599:. 1595:. 1578:^ 1548:. 1536:. 1513:. 1503:. 1495:. 1481:. 1477:. 1465:^ 1426:. 1418:. 1408:. 1394:. 1390:. 1367:. 1359:. 1347:. 1324:. 1312:31 1310:. 1306:. 1283:. 1273:. 1261:23 1259:. 1255:. 1207:, 1195:^ 1181:. 1171:. 1161:82 1159:. 1155:. 1143:^ 1129:. 1119:12 1117:. 1094:. 1084:. 1070:. 1066:. 1054:^ 1014:. 1002:17 1000:. 996:. 983:^ 955:. 922:. 874:. 862:. 858:. 695:. 666:. 614:. 424:. 400:. 364:. 344:, 340:, 336:, 222:. 188:: 177:, 173:: 128:, 2215:) 2207:( 2201:( 2185:( 2179:) 2175:( 2157:) 2149:( 2131:( 2099:( 2093:) 2085:( 1878:e 1871:t 1864:v 1828:. 1798:. 1776:: 1766:: 1739:. 1725:: 1698:. 1619:. 1607:: 1556:. 1544:: 1521:. 1489:: 1459:. 1434:. 1412:: 1402:: 1375:. 1355:: 1349:2 1332:. 1291:. 1267:: 1189:. 1167:: 1137:. 1125:: 1102:. 1078:: 1072:4 1036:. 1022:. 1008:: 977:. 963:. 926:. 889:. 870:: 825:. 444:( 169:( 157:] 20:)

Index

Atrium (anatomy)

Heart
System
Circulatory system
Latin
MeSH
D006325
TA98
A12.1.00.017
TA2
4022
4054
FMA
7099 85574, 7099
Anatomical terminology
edit on Wikidata
Latin
lit.
upper chambers
heart
circulatory system
heart ventricles
atrioventricular
mitral
tricuspid
heart valves
pulmonary circulation
venae cavae
systemic circulation

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