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Topic: Right ventricle


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In the News (Mon 30 Nov 09)

  
  Right ventricle definition - Medical Dictionary definitions of popular medical terms easily defined on MedTerms
Right ventricle: The lower right chamber of the heart that receives deoxygenated blood from the right atrium and pumps it under low pressure into the lungs via the pulmonary artery.
The tricuspid valve is located between the right atrium and right ventricle and ensures the flow of blood from the right atrium into the right ventricle and prevents the reverse.
The pulmonary valve is situated between the right ventricle and the pulmonary artery and performs similarly as a one-way valve.
www.medterms.com /script/main/art.asp?articlekey=9124   (202 words)

  
  Ventricles
The junction between the infundibulum and the right ventricle is composed of the parietal band, the septal band and the moderator band.
The three components of the definitive right ventricle are therefore the inlet (the tricuspid valve and atrioventricular septum), the apical trabecular portion, and the outlet portion (infundibulum).
The infundibulum, is incorporated mainly into the right ventricle, where it forms a conal ring consisting of three components: (1) the distal conal septum, which extends on to the parietal or free wall, forming the parietal band; (2) the septal band, or proximal conal septum; and (3) the moderator band.
www.pediheart.org /practitioners/anatomy/ventricles.htm   (1225 words)

  
 Lifespan's A - Z Health Information Library - Right-sided heart failure
Heart failure may affect the right side of the heart (right ventricle), the left side (left ventricle), or both sides.
In addition, the right ventricle may be unable to pump blood efficiently to the lungs and to the left ventricle.
In right heart catheterization, a catheter is inserted through a vein into the right side of the heart to measures the pressures.
www.lifespan.org /adam/healthillustratedencyclopedia/1/000154.html   (853 words)

  
 Heart...MedicalGeo.com
Valves between the atria and ventricles (atrioventricular valves) maintain coordinated unidirectional flow of blood from the upper atria to the lower ventricles.
The ventricles are the parts of the heart that pump blood around the body or to the lungs.
The atrial systole consists of the contraction of the atria and the corresponding influx of blood in to the ventricles.
www.medicalgeo.com /heart.html   (0 words)

  
 VII. The Blood Passes Through the Substance of the Lungs from the Right Ventricle of the Heart into the Pulmonary Veins ...
In the liver there is no forcing, no impelling power; in the lungs the blood is forced on by the pulse of the right ventricle, the necessary effect of whose impulse is the distension of the vessels and the pores of the lungs.
And then the lungs, in respiration, are perpetually rising and falling: motions, the effect of which must needs be to open and shut the pores and vessels, precisely as in the case of a sponge, and of parts having a spongy structure, when they are alternately compressed and again are suffered to expand.
Galen adduces this argument for the transit of the blood by the right ventricle from the vena cava into the lungs; but we can use it with still greater propriety, merely changing the terms, for the passage of the blood from the veins through the heart into the arteries.
www.bartleby.com /38/3/7.html   (586 words)

  
 The thorax   (Site not responding. Last check: )
The right is the venous side of the heart, receiving into its auricle the dark venous blood from the entire body, by the superior and inferior cavse, and coronary sinus.
It is situated at the base of the right ventricle, near the right border of the heart, and corresponds to the sternum between the third costal cartilages.
The auriculo-ventricular rings serve for the attachment of the muscular fibres of the auricles and ventricles, and also for the mitral and tricuspid valves; the left one is closely connected, by its right margin, with the aortic arterial ring.
thethorax.com /heart.html   (4167 words)

  
 Right Ventricular Infarction
The main blood vessel is the right coronary artery (serves the lateral wall, the posterior wall and posterior interventricular septum by the post descending a).
The lower afterload and myocardial oxygen demand of the right ventricle [as compared with the left] explain its lower oxygen extraction at rest and its relative resistance to irreversible ischemic damage during right coronary occlusion.
Right ventricular infarction occurs when there is an occlusion of the right coronary artery proximal to the acute marginal branches.
www.4um.com /tutorial/icm/rvi.htm   (1623 words)

  
 HeartScape: The Chambers of the Heart
The right atrium's wall is approximately only 2mm in thickness due to the combined influence of the low pressure of this chamber and the ease of pumping to low pressure areas (right ventricle).
The right ventricle is separated from the left ventricle by the septum.
The left ventricle is the largest chamber of the heart, accounting for the majority of the anterior and left lateral surfaces of the heart.
www.skillstat.com /heartscape/chambers.htm   (1254 words)

  
 Double Outlet Right Ventricle
This is in contrast to the normal heart, where the Aorta attaches to the left ventricle and the Pulmonary Artery attaches to the right ventricle.
Blood from the left ventricle, which would normally leave the heart through the attached aorta, now must cross an abnormal hole in the wall dividing the right and left ventricles, called a Ventricular Septal Defect (VSD), in order to leave the heart and supply the head and body with blood.
In this condition, the normally separated oxygen-rich arterial blood and oxygen-poor venous blood is mixed in the right ventricle prior to leaving the heart.
www.childrenscolumbus.org /GD/gd.aspx?page=1782   (371 words)

  
 DORV
Continuity between the right ventricle and the pulmonary arteries is generally established by the placement of a conduit - preferably an aortic allograft, as a pulmonary allograft is unlikely to be sufficiently long.
The right pulmonary artery is mobilized on the right side of the superior vena cava, and the left pulmonary artery is mobilized well past the left atrial appendage and fold of Marshall.
The pulmonary valve is excised from the right ventricular outflow tract in a manner analogous to that of the pulmonary autograft operation.
www.pediheart.org /practitioners/operations/DORV.html   (2592 words)

  
 Heart Conditions in Adults - Congenital Heart Defects
In this condition, the aortic valve between the left ventricle and the aorta did not form properly and is narrowed, making it difficult for the heart to pump blood to the body.
Some congenital heart defects allow blood to flow between the right and left chambers of the heart because an infant is born with an opening in the septum wall that separates the right and left sides of the heart.
In this defect, there is a downward displacement of the tricuspid valve (located between the upper and lower chambers on the right side of the heart) into the right bottom chamber of the heart (or right ventricle).
www.stjosephsatlanta.org /greystone/centers/heart/congent.html   (1214 words)

  
 Cavalier King Charles Spaniel Club - USA - Heart Information
On the right side of the heart, the right atrium receives deoxygenated blood from the body and transmits it to the right ventricle.
The tricupsid valve separates the right atrium from the right ventricle and the pulmonary valve separates the right ventricle from the pulmonary artery.
The intensity of the murmur is proportional to the severity of the narrowing of the valve and enlargement of the right ventricle.
www.ckcsc.org /ckcsc/ckcsc_inc.nsf/founded-1954/heart.html   (1333 words)

  
 Ventricle
The right ventricle receives blood from the right atrium during ventricular diastole and propels blood into the pulmonary circulation during ventricular systole (figures 104a, 105a, 105b).
The right ventricle is normally the most anterior cardiac chamber, lying directly beneath the sternum.
The right ventricle is partially below, in front of, and medial to the right atrium but anterior and to the right of the left ventricle.
www.rjmatthewsmd.com /Definitions/ventricle.htm   (324 words)

  
 Modern History Sourcebook: William Harvey (1578-1657): On The Motion Of The Heart And Blood In Animals
When the left ventricle ceases to act, to contract, to pulsate, the pulse in the arteries also ceases; further, when this ventricle contracts languidly, the pulse in the arteries is scarcely perceptible.
It is in virtue of one and the same cause, therefore, that all the arteries of the body pulsate, viz., the contraction of the left ventricle; in the same way as the pulmonary artery pulsates by the contraction of the right ventricle.
The right ventricle sends its charge into the lungs by the vessel which is called vena arteriosa, but which in structure and function, and all other respects, is an artery.
www.fordham.edu /halsall/mod/1628harvey-blood.html   (9738 words)

  
 FDA Heart Health Online - The Healthy Heart
The ventricular septum divides the right and left ventricles.
Blood from the body is carried into the heart’s right atrium by blood vessels called the vena cava.
When the right ventricle fills with blood, it contracts, sending blood to the lungs through blood vessels called the pulmonary arteries.
www.fda.gov /hearthealth/healthyheart/healthyheart.html   (0 words)

  
 right sided heart failure
Right heart failure (RHF) is a clinical diagnosis that doesn't necessarily involve the right ventricle.
As the pulmonary artery pressures increase, the right ventricular pressure increases and the right ventricle dilates because it is a thin-walled structure that is used to very low pressures in a normal functioning heart.
As the right ventricle dilates, it contractility is reduced and therefore, fluid returning from the venous system is not "pushed" through the right side of the heart well and backs up.
www.medhelp.org /forums/cardio/archive/3080.html   (640 words)

  
 ISACCD - Glossary A-A
A rare abnormality associated with right aortic arch wherein the sequence of arteries arising from the aortic arch is: right carotid artery, right subclavian artery, then (left) innominate artery.
Note that left or right aortic arch is defined by the mainstem bronchus that is crossed by the descending thoracic aorta and does not refer to the side of the midline on which the aorta descends.
In right aortic arch the descending thoracic aorta crosses the right mainstem bronchus.
www.isaccd.org /profres/a.php   (1731 words)

  
 How the Heart Works - All Sections (printer-friendly)
The ventricle on the right side of your heart pumps blood from the heart to your lungs.
From the right ventricle, the used blood is pumped through the pulmonary (PULL-mun-ary) arteries (in blue in the center of picture) to your lungs.
From the His bundle, the signal fibers divide into left and right bundle branches through the Purkinje fibers that connect directly to the cells in the walls of your heart’s left and right ventricles (see yellow on the picture).
www.nhlbi.nih.gov /health/dci/Diseases/hhw/hhw_all.html   (2913 words)

  
 Reference.com/Encyclopedia/Right ventricle
The right ventricle is one of four chambers (two atria and two ventricles) in the human heart.
It receives de-oxygenated blood from the right atrium via the tricuspid valve, and pumps it into the pulmonary artery via the pulmonary valve.
It is triangular in form, and extends from the right atrium to near the apex of the heart.
www.reference.com /browse/wiki/Right_ventricle   (292 words)

  
 Heart Pumping Actions   (Site not responding. Last check: )
When the right ventricle relaxes, the valves are forced close to prevent back-flow of blood.
You may have noticed that the heart muscle of the left ventricle is thicker than muscle of the right ventricle.
This is because, the right ventricle only needs to pump blood to the lungs, which are not far away from the heart.
library.thinkquest.org /25896/sub_heart/action.htm   (465 words)

  
 BHF Any Questions? - Double outlet right ventricle   (Site not responding. Last check: )
The right side of the heart receives blood from the body that has used up its oxygen, so the blood is pumped to the lungs through the pulmonary artery to replenish its supply.
In double outlet right ventricle, the body's two biggest arteries (the aorta and the pulmonary artery) originate in the right ventricle.
Blood from the left ventricle, passes through a small opening in the wall between the left and right sides of the heart into the right ventricle to reach the two arteries.
www.bhf.org.uk /questions/index.asp?secondlevel=1160&thirdlevel=1278   (580 words)

  
 Sheep Heart 6
The pulmonary trunk, carrying blood low in oxygen and high in carbon dioxide to the lungs, exits the right ventricle and curves toward the left side of the heart.
When the ventricles contract during systole, the increasing blood pressure within the ventricles forces the cusps of the semilunar valves outward against the arterial walls so that the blood can pass into the aorta and pulmonary trunk.
When the ventricles relax (diastole), the pressures within the ventricular chambers fall, and the back flow of arterial blood attempting to reenter the ventricles fills the pockets of the valves and snaps them shut.
bioweb.uwlax.edu /aplab/Table_of_Contents/Lab_19/Sheep_Heart_6/sheep_heart_6.html   (261 words)

  
 Heart: Biology of the Heart and Blood Vessels: Merck Manual Home Edition
In the left ventricle, the inlet valve is the mitral valve, and the outlet valve is the aortic valve.
In the right ventricle, the inlet valve is the tricuspid valve, and the outlet valve is the pulmonary (pulmonic) valve.
The right side of the heart pumps blood to the lungs, where oxygen is added to the blood and carbon dioxide is removed from it.
www.merck.com /mmhe/print/sec03/ch020/ch020b.html   (1118 words)

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