Pre-natal dextro-transposition of the great arteries
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Dextro-transposition of the great arteries Microchapters |
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Differentiating dextro-transposition of the great arteries from other Diseases |
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Diagnosis |
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Treatment |
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Case Studies |
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Pre-natal dextro-transposition of the great arteries On the Web |
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Transposition of the great vessels Microchapters |
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Classification |
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Differentiating Transposition of the great vessels from other Diseases |
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Diagnosis |
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Treatment |
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Surgery |
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Case Studies |
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Pre-natal dextro-transposition of the great arteries On the Web |
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American Roentgen Ray Society Images of Pre-natal dextro-transposition of the great arteries |
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Pre-natal dextro-transposition of the great arteries in the news |
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Blogs on Pre-natal dextro-transposition of the great arteries |
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Risk calculators and risk factors for Pre-natal dextro-transposition of the great arteries |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-In-Chief: Priyamvada Singh, M.B.B.S. [2]; Cafer Zorkun, M.D., Ph.D. [3]; Keri Shafer, M.D. [4]; Assistant Editor(s)-In-Chief: Kristin Feeney, B.S. [5]
Overview
Diagnosis can be done after 18 weeks gestation using an ultrasound. However, if it is not diagnosed in utero, cyanosis of the newborn (blue baby) should immediately indicate that there is a problem with the cardiovascular system.
Pre-natal d-TGA
- Most of the time, diagnosis can be done after 18 weeks gestation using an ultrasound. However, if it is not diagnosed in utero, cyanosis of the newborn (blue baby) should immediately indicate that there is a problem with the cardiovascular system.
Prenatally, a baby with d-TGA experiences no symptoms as the lungs will not be used until after birth, and oxygen is provided by the mother via the placenta and umbilical cord; in order for the red blood to bypass the lungs in utero, the fetal heart has two shunts that begin to close when the newborn starts breathing; these are the foramen ovale and the ductus arteriosus. The foramen ovale is a hole in the atrial septum which allows blood from the right atrium to flow into the left atrium; after birth, the left atrium will be filled with blood returning from the lungs and the foramen ovale will close. The ductus arteriosus is a small, artery-like structure which allows blood to flow from the trunk of the pulmonary artery into the aorta; after birth, the blood in the pulmonary artery will flow into the lungs and the ductus arteriosus will close. Sometimes these shunts will fail to close after birth; these defects are called patent foramen ovale and patent ductus arteriosus, and either may occur independently, or in combination with one another, or with d-TGA or other heart and/or general defects.
In the presence of a d-TGA, the fetus will be asymptomatic due to the presence of shunts during the intrauterine period until after birth when several changes are produced in the circulation:
The following Fetal structures become the following Infant and adult structures :
- The foramen ovale becomes the fossa ovalis
- The ductus arteriosus becomes the ligamentum arteriousus
- The ductus venosus becomes the ligamentum venosus
- The umbilical vein becomes the ligamentum teres
- The umbilical arteries becomes the medial umbilical ligaments
References
Acknowledgements and Initial Contributors to Page
Leida Perez, M.D.
External links
- Diagram at kumc.edu
- Diagram and description at umich.edu
- Royal Children's Hospital, Melbourne
- Mayo Clinic, Arizona - Florida - Minnesota, USA
