Tricuspid atresia pathophysiology: Difference between revisions
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==Pathophysiology== | ==Pathophysiology== | ||
===Normal Human Heart=== | ===Normal Human Heart=== | ||
[[Image:Diagram of the human heart (cropped).svg| | [[Image:Diagram of the human heart (cropped).svg|left|400px|Caption:Anterior (frontal) view of the opened heart. White arrows indicate normal blood flow. (Tricuspid valve labeled at bottom left.)]] | ||
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===Tricuspid Atresia=== | ===Tricuspid Atresia=== | ||
[[Image:Tricuspid_atreisa.png| | [[Image:Tricuspid_atreisa.png|left|500px]] | ||
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{{#ev:youtube|BsvdUEbHyDE}} | |||
This defect occurs during prenatal development. Because of the lack of an A-V connection, an [[atrial septal defect]] (ASD) ''must'' be present to maintain blood flow. Also, since there is a lack of a right ventricle there ''must'' be a way to pump blood into the [[pulmonary arteries]], and this is accomplished by a [[ventricular septal defect]] (VSD). | This defect occurs during prenatal development. Because of the lack of an A-V connection, an [[atrial septal defect]] (ASD) ''must'' be present to maintain blood flow. Also, since there is a lack of a right ventricle there ''must'' be a way to pump blood into the [[pulmonary arteries]], and this is accomplished by a [[ventricular septal defect]] (VSD). | ||
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Shown below is an example of Tricuspid atresia characterized by a dimple in the floor of the right atrium. | Shown below is an example of Tricuspid atresia characterized by a dimple in the floor of the right atrium. | ||
[[Image:TA 1.jpg| | [[Image:TA 1.jpg|left|250px]] | ||
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==References== | ==References== | ||
Revision as of 22:05, 2 October 2012
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor-In-Chief: Keri Shafer, M.D. [2] Priyamvada Singh, MBBS [[3]]; Assistant Editor-In-Chief: Kristin Feeney, B.S. [[4]]
Overview
Pathophysiology
Normal Human Heart
.svg)
Tricuspid Atresia
{{#ev:youtube|BsvdUEbHyDE}}
This defect occurs during prenatal development. Because of the lack of an A-V connection, an atrial septal defect (ASD) must be present to maintain blood flow. Also, since there is a lack of a right ventricle there must be a way to pump blood into the pulmonary arteries, and this is accomplished by a ventricular septal defect (VSD).
Blood is mixed in the left atrium. Because the only way the pulmonary circulation receives blood is through the VSD, a patent ductus arteriosus is usually also formed to increase pulmonary flow.
Gross Pathology
Shown below is an example of Tricuspid atresia characterized by a dimple in the floor of the right atrium.
