Tricuspid atresia pathophysiology: Difference between revisions
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==Overview== | ==Overview== | ||
In tricuspid atresia, there is no continuity between the right atrium and right ventricle. Blood from superior vena cava and inferior vena cava is forced across intra atrial connection into the left heart. As a consequence, oxygen saturation in the left atrial blood is diminished. | In tricuspid atresia, there is no continuity between the [[right atrium]] and [[right ventricle]]. Blood from [[superior vena cava]] and [[inferior vena cava]] is forced across intra atrial connection into the [[left heart]]. As a consequence, [[oxygen saturation]] in the left atrial blood is diminished. | ||
==Pathophysiology== | ==Pathophysiology== | ||
===Normal Human Heart=== | ===Normal Human Heart=== | ||
Revision as of 17:22, 25 January 2013
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Tricuspid atresia Microchapters |
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Tricuspid atresia pathophysiology On the Web |
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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
In tricuspid atresia, there is no continuity between the right atrium and right ventricle. Blood from superior vena cava and inferior vena cava is forced across intra atrial connection into the left heart. As a consequence, oxygen saturation in the left atrial blood is diminished.
Pathophysiology
Normal Human Heart
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Tricuspid Atresia
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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.
Associated Conditions
Gross Pathology
Shown below is an example of Tricuspid atresia characterized by a dimple in the floor of the right atrium.
