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Topic: Right atrium

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	Atrium (anatomy) - Wikipedia, the free encyclopedia
		In anatomy, the atrium (plural: atria) is the blood collection chamber of a heart.
		The atrium's function in the circulatory system includes receiving blood as it returns to the heart to complete a circulating cycle, whereas the ventricle's function is to pump blood out of the heart to start a new cycle.
		The right atrium receives blood from the superior vena cava and inferior vena cava.
	en.wikipedia.org /wiki/Atrium_(anatomy) (216 words)

	Figures
		Left panel: The first beat (left panel) is initiated in the superior left atrium as seen in the left pulmonary artery recordings (LLPA) and emerges in the mid to lower right atrial septum into the right atrium.
		Right atrial map from the same patient as in Figure 2 shows a right atrial flutter with macroreentrant activation.
		Dual-site right atrial pacing wavefronts mapped after creation of a right atrial maze in a patient with permanent atrial fibrillation after mitral valve replacement 5 years prior to this intervention.
	www.medscape.com /content/2004/00/47/50/475085/475085_fig.html (381 words)

	Right atrium: Definition and Links by Encyclopedian.com - All about Right atrium (Site not responding. Last check: 2007-10-21)
		The right atrium is one of the four chambers of the heart in mammals and birds, along with the left ventricle, right ventricle and left atrium.
		The right atrium recieves oxygen-depleted blood from the body and passes it to the right ventricle.
		Blood enters the heart through two veins, the superior vena cava and the inferior vena cava, then goes to the right atrium, then the right ventricle and to the lungs.
	www.encyclopedian.com /ri/Right-atrium.html (196 words)

	Venous
		In patients with right atrial isomerism, the right and left hepatic veins may enter the ipsilateral sides of the common atrium, remaining separate from the inferior vena caval entrance.
		In right atrial isomerism, both lungs tend to be trilobed, whereas in left atrial isomerism both lungs tend to be bilobed.
		Other rare anomalies of the superior vena cava include a right superior vena cava connected to left atrium, and a right superior vena cava connecting with both the right and left atria through separate orifices in the presence of an intact atrial septum.
	www.pediheart.org /practitioners/defects/venous.htm (2042 words)

	Pediatric Oncall- ATRIAL SEPTAL DEFECT (ASD) (Site not responding. Last check: 2007-10-21)
		The impure blood in the right atrium is separated from pure blood in the left atrium by the atrial septum.
		This is because the pressure of blood in left atrium is higher than that of the right atrium.
		Sometimes clots may enter the right atrium and pass through the ASD into left atrium which then passes into the aorta and to the brain leading to a stroke – phenomenon known as paradoxical embolization.
	www.pediatriconcall.com /forpatients/CommonChild/atrial.asp (407 words)

	Lecture 14. The Human Heart (Site not responding. Last check: 2007-10-21)
		The tricuspid valve is on the right side, the bicuspid valve is on the left.
		The SA node is located in the right atrium at the base of the superior vena cava.
		Right and Left Bundle Branches course in the muscular portion of the interventricular septum.
	ext.sac.edu /faculty_staff/mansfield_patricia/14heart.html (730 words)

	Heart -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-21)
		The blood then passes through the (Valve with three cusps; situated between the right atrium and the right ventricle; allows blood to pass from atrium to ventricle and closes to prevent backflow when the ventricle contracts) tricuspid valve to the right ventricle.
		The right ventricle pumps the deoxygenated blood to the lungs, through the (One of two arteries (branches of the pulmonary trunk) that carry venous blood from the heart to the lungs) pulmonary artery.
		From the left atrium this newly oxygenated blood passes through the (Valve with two cusps; situated between the left atrium and the left ventricle) mitral valve to enter the left ventricle.
	www.absoluteastronomy.com /encyclopedia/h/he/heart.htm (1771 words)

	Venoatrial (Site not responding. Last check: 2007-10-21)
		In contrast, the superior vena cava is not at all a reliable diagnostic marker of the right atrium, since the superior vena cava may return to the left atrium, where it referred to as the levoatrial cardinal vein.
		In right atrial isomerism, there is often bilateral right-sidedness, hence, the associated anomalies would include the asplenia syndrome, bilateral superior vena cavae, bilateral trilobed (morphologically right) lungs, and bilateral morphologically right atrial appendages.
		Right or left isomerism are helpful mnemonics that assist one to remember the associated lesions, however, there is considerable variation within each syndrome, and features of one syndrome can be found in the other.
	www.pediheart.org /practitioners/anatomy/venoatrial.htm (483 words)

	Atrial Septal Defect, What Is, NHLBI DCI (Site not responding. Last check: 2007-10-21)
		From the right atrium, the blue blood flows to the right ventricle—one of the two lower chambers of the heart—and is pumped to the lungs to pick up oxygen.
		The red blood returns from the lungs to the left atrium and goes to the left ventricle, where it is pumped to the body.
		This defect is in the upper part of the septum near where a large vein (the superior vena cava) brings blue blood from the upper body to the right atrium.
	www.nhlbi.nih.gov /health/dci/Diseases/asd/asd_what.html (767 words)

	Guiding introducer system for use in the right atrium - Patent 5840027
		The right atrium is in fluid communication with the superior vena cava and the inferior vena cava.
		On the inner wall of the right atrium where it is connected with the left atrium is a recessed portion, the fossa ovalis.
		The AV node lies near the ostium of the coronary sinus in the interatrial septum in the right atrium.
	www.freepatentsonline.com /5840027.html (4926 words)

	[No title]
		Blood is shunted from the right atrium to the left atrium through both the foramen ovale (near the floor of the right atrium) and through the foramen secundum (near the roof of the left atrium).
		The right horn becomes larger because of the two left-to-right shunts of venous blood: * the degeneration of proximal umbilical and vitelline veins * the formation of an oblique anastomosis between anterior cardinal veins draining the head The coronary sinus It moves to the right and enters the right atrium.
		The trabeculated portions of the right atrium: the right auricle and the remainder of the interior wall.
	www.ecu.edu /medicalstudents/classof2006/m1fallexam3/cardioembryoanswers.doc (1515 words)

	Assignment 2 (Site not responding. Last check: 2007-10-21)
		The right side of the heart receives de-oxygenated blood from the body, then pumps it out to the lungs to be "refueled" with oxygen.
		Atriums are receiving chambers, and they serve to receive blood and then pass it down to the ventricles, which in turn pump the blood out of the heart.
		The Right Atrium, therefore, is a chamber of the heart that receives blood from the body, and then passes it down to the right ventricle so it can be pumped out to the lungs.
	www3.telus.net /onlineportfolio/3205folder/assign2/pages/ratrium.html (105 words)

	► Tricuspid atresia
		Tricuspid atresia is a type of congenital heart disease in which blood is unable to flow from the right atrium to the right ventricle because the tricuspid valve is missing or abnormally developed.
		For unoxygenated blood to reach the lungs, it must flow from the right atrium into the left atrium through a hole called the foramen ovale, which is a passageway in the fetal heart that normally closes shortly after birth.
		From the left atrium, blood then flows to the left ventricle and then either to the right ventricle, through a hole called a ventricular septal defect (VSD), or to the aorta.
	www.umm.edu /ency/article/001110.htm (375 words)

	About the Heart (Site not responding. Last check: 2007-10-21)
		The right atrium and the right ventricle are connected by an orifice which is about an inch and a half in diameter.
		From the right ventricle, the pulmonary artery is the pathway for deoxygenated blood to pass into the lungs.
		There is an opening between the pulmonary artery and the right ventricle which is protected by the pulmonary semilunar valve (three-fold valve).
	www.bethisraelny.org /services/cardiology/right_ventricle.html (128 words)

	Abnormalities Related to Ebstein's Anomaly, Mayo Clinic
		The right atrium, therefore, is larger than usual and the functional right ventricle is smaller than normal.
		The right ventricle is the pumping chamber of the side of the heart which propels blood to the lungs.
		With greater malformation and leakage of the tricuspid valve, the right atrium enlarges as it receives a greater blood volume; and the right ventricle will also dilate as it tries to cope with the leaky valve and still push blood forward to the lungs.
	www.mayoclinic.org /ebsteins-anomaly/abnormalities.html (551 words)

	Glossary (Site not responding. Last check: 2007-10-21)
		A T-shaped vessel separated into a right branch connected to the right lung and a left branch connected to the left lung that brings blood to the lungs.
		The cardiac valve that separates the right atrium from the right ventricle.
		When the right ventricle contracts, it closes and prevents blood from going back to the right atrium.
	alcor.concordia.ca /~dc_stron/h2h/gloss.htm (439 words)

	BioInteractive's Animation Console
		In this model, the right atrium (on your left) is shown in blue, the left atrium (on your right) in yellow, the right ventricle in purple, and the left ventricle in red.
		Deoxygenated blood from the body enters the right atrium through two large veins: the superior vena cava (top) and the inferior vena cava (bottom).
		Blood enters the left atrium from right and left pulmonary veins and then passes through the mitral valve into the left ventricle.
	www.hhmi.org /biointeractive/animations/heart/heart_print.htm (1060 words)

	Tropical Medicine Central Resource (Site not responding. Last check: 2007-10-21)
		Biventricular disease is dominated clinically and radiologically by the right side, because the low cardiac output tends to protect and mask the left-sided changes.
		The enlarged right atrium displaces the root of the aorta to the left, and the right coronary artery is displaced anteriorly in a wide arc as it lies in the atrioventricular (AV) groove and courses to the crux.
		The elevation and curvature of the right coronary artery is consequent on displacement of the atrioventricular groove from the giant right atrium.
	tmcr.usuhs.mil /tmcr/chapter25/clinical3.htm (429 words)

	2D Echo
		This right parasternal long-axis view of the heart shows that the left atrium (LA) is larger than the left ventricle (LV).
		The left atrium is markedly enlarged in this right parasternal cross-sectional view of the base of the heart.
		The enlarged left auricle projects cranially (to the right of the body of the left atrium [LA] in the picture).
	www.vmth.ucdavis.edu /Cardio/cases/case9/2decho.htm (270 words)

	Congenital Malformations of the Right Atrium and the Coronary Sinus : An Analysis Based on 103 Cases Reported in the ...
		Congenital Malformations of the Right Atrium and the Coronary Sinus
		Petit, A, Eicher, JC, Louis, P (1988) Congenital diverticulum of the right atrium situated on the floor of the coronary sinus.
		Marin-Garcia, J, Allen, RG (1983) Idiopathic dilatation of the right atrium: postoperative follow-up in a child.
	www.chestjournal.org /cgi/content/full/117/6/1740 (3792 words)

	MedlinePlus Medical Encyclopedia: Atrial myxoma - right (Site not responding. Last check: 2007-10-21)
		Right atrial myxomas are sometimes associated with tricuspid stenosis and atrial fibrillation.
		Right atrial myxomas rarely produce symptoms until they have grown to be at least 13 cm (about 5 inches) in diameter.
		Some of the symptoms and signs in right atrial myxoma may be caused by tricuspid stenosis (an obstruction of the valve that separates the right atrium and the right ventricle).
	www.nlm.nih.gov /medlineplus/ency/article/000197.htm (530 words)

	Tricuspid valve insufficiency (Site not responding. Last check: 2007-10-21)
		The tricuspid valve is located between the right atrium and the right ventricle of the heart.
		When the right ventricle contracts, it is supposed to pump blood forward into the lungs.
		When the atrium receives its usual quantity of blood from veins leading to the heart, plus the leaking blood, the pressure inside the atrium increases.
	www.rwjhamilton.org /Atoz/ency/tricuspid_valve_insufficiency.asp (609 words)

	Valvular Heart Disease (Site not responding. Last check: 2007-10-21)
		The upper chamber on the right side (right atrium) receives blood returned from various parts of the body and then empties to the right lower chamber (right ventricle).
		There is a valve between the right atrium and the ventricle, called tricuspid valve.
		This valve allows emptying of blood from the right atrium into the right ventricle and then closes to prevent the return of blood back into the right atrium.
	www.kfshrc.edu.sa /cardiovascular/html/valvular_heart_disease.html (1074 words)

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