|
|
| (One intermediate revision by the same user not shown) |
| Line 1: |
Line 1: |
| {{Infobox_Disease |
| | #Redirect[[Right-to-left shunt]] |
| Name = {{PAGENAME}} |
| |
| Image = MRI Fallot.jpg|
| |
| Caption = MRI: Tetralogy of Fallot; Left anterior oblique view. with VSD and overriding aorta. <br> <small> [http://www.peir.net Image courtesy of Professor Peter Anderson DVM PhD and published with permission © PEIR, University of Alabama at Birmingham, Department of Pathology] </small>|
| |
| DiseasesDB = |
| |
| ICD10 = |
| |
| ICD9 = |
| |
| ICDO = |
| |
| OMIM = |
| |
| MedlinePlus = |
| |
| eMedicineSubj = |
| |
| eMedicineTopic = |
| |
| MeshID = |
| |
| }}
| |
| {{SI}}
| |
| {{WikiDoc Cardiology Network Infobox}}
| |
| {{CMG}}
| |
| | |
| {{Editor Help}}
| |
| | |
| == Overview ==
| |
| A '''right-to-left shunt''' is a [[heart|cardiac]] [[cardiac shunt|shunt]] which allows, or is designed to cause, [[blood]] to [[circulatory system|flow]] from the [[right heart]] to the [[left heart]].
| |
| | |
| A right-to-left shunt occurs when:
| |
| #there is an opening or passage between the [[atria]], [[Ventricle (heart)|ventricle]]s, and/or [[great vessels]]; ''and'', | |
| #right heart [[blood pressure|pressure]] is higher than left heart pressure and/or the shunt has a one-way [[heart valve|valvular]] opening.
| |
| | |
| The most common cause of right-to-left shunt is the [[Tetralogy of Fallot]], a congenital cardiac anomaly characterized by four co-existing heart defects. The four defects include:
| |
| | |
| #[[Pulmonary stenosis]] (narrowing of the [[pulmonary valve]] and outflow tract, obstructing blood flow from the right ventricle to the pulmonary artery)
| |
| #[[Ventricular septal defect]] (defect in the ventricular septum, which divides the left and right ventricles of the heart)
| |
| #[[Overriding aorta]] (aortic valve is enlarged and appears to arise from both the left and right ventricles instead of the left ventricle, as occurs in normal hearts)
| |
| #Right [[ventricular hypertrophy]] (thickening of the muscular walls of the right ventricle)
| |
| | |
| A right to left shunt frequently causes [[hypoxemia]].
| |
| | |
| == Acknowledgements ==
| |
| | |
| The content on this page was first contributed by: [[C. Michael Gibson]], M.S., M.D.
| |
| | |
| {{Congenital malformations and deformations of circulatory system}}
| |
| {{SIB}}
| |
| {{WikiDoc Help Menu}}
| |
| {{WikiDoc Sources}}
| |
| | |
| [[Category:Disease]]
| |
| [[Category:Cardiology]]
| |
| [[Category:Pulmonology]]
| |