Michael P. D'Alessandro, M.D.
Peer Review Status: Internally Peer Reviewed
Ductus ateriosus extends from the main pulmonary artery to the descending aorta, in fetal life it shunts blood from the pulmonary venous circulation to the systemic circulation. At birth increased systemic arterial oxygen concentration leads to closure by 1 week of age. A PDA can be life sustaining in cases with obstructed left venticle outflow or decreased pulmonary blood flow. It causes a left to right shunt due to the systemic arterial pressure being greater than the pulmonary arterial pressure.
Larger PDAs cause shunt vascularity and dilation of left atrium, left ventricle, and aorta. The prominent aortic arch in PDA helps to distinguish it from ASD and VSD which have less prominent or normal aortic arches.
See References Chapter.
Section Top | Title Page
Please send us comments by filling out our Comment Form.
All contents copyright © 1992-2014 Donna M. D'Alessandro, M.D. and Michael P. D'Alessandro, M.D. and the authors. All rights reserved.
"Virtual Pediatric Hospital", the Virtual Pediatric Hospital logo, and "A digital library of pediatric information" are all Trademarks of Donna M. D'Alessandro, M.D. and Michael P. D'Alessandro, M.D.
Virtual Pediatric Hospital is funded in whole by Donna M. D'Alessandro, M.D. and Michael P. D'Alessandro, M.D. Advertising is not accepted.
Your personal information remains confidential and is not sold, leased, or given to any third party be they reliable or not.
The information contained in Virtual Pediatric Hospital is not a substitute for the medical care and advice of your physician. There may be variations in treatment that your physician may recommend based on individual facts and circumstances.
This site complies with the HONcode standard for trustworthy health information: