Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Newborns with heart defect have low blood flow in brain before surgery

08.12.2004


As survival rates have steadily improved for children with heart defects, physicians have focused more attention on improving quality-of-life factors such as neurological and cognitive abilities. A new study shows that newborns with congenital heart disease often have abnormally low blood flow in their brains before they undergo surgery.



Researchers from The Children’s Hospital of Philadelphia led the study, published in the December issue of The Journal of Thoracic and Cardiovascular Surgery.

One of every 100 children is born with a heart defect--one-third of which are severe enough to require surgery during the newborn period. Many of those high-risk children are identified as having neurological and cognitive problems during the months and years that follow. While some of these problems may be related to the complexity of the surgery, evidence is mounting that abnormal neurological conditions play a role even before surgery.


The current study, which used a novel magnetic resonance imaging (MRI) technique developed by members of the investigative team, was the first to measure the infants’ cerebral blood flow before surgery. The reduced blood flow was associated with abnormal features in the newborn brain, according to pediatric neurologist Daniel J. Licht, M.D., who led the multidisciplinary research team at Children’s Hospital. "Some of the neurodevelopmental problems that these children experience may be attributable to necessary surgical practices such as heart-lung bypass," said Dr. Licht. "However, many infants with heart defects have neurological abnormalities before surgery."

The research team at The Children’s Hospital of Philadelphia studied 25 newborns born at term with congenital heart defects. They found cerebral blood flow to be significantly lower than in healthy newborns, sometimes drastically reduced. The low blood flow was also associated with a condition called periventricular leukomalacia (PVL), a scarring of white matter in the brain. PVL has often been linked to neurological problems such as attention deficit-hyperactivity disorder in infants without heart disease. More severe forms of PVL have been associated with cerebral palsy in infants who are born prematurely.

A previous study by the same multidisciplinary team at Children’s Hospital found PVL to be common before surgery in newborns with congenital heart disease. The current study could not determine whether the low blood flow levels caused the PVL, but those levels may be useful in guiding future treatments. "If we can define early markers for injury severity or injury risk, we may be able to better identify newborn babies who could benefit from protective therapies, thereby improving their quality of life," said Dr. Licht.

Dr. Licht is a Pfizer Scholar and is also supported by the W.W. Smith Charitable Trust. Dr. Licht’s co-authors were Jiongjiong Wang, Ph.D., David W. Silverstre, B.S., Susan C. Nicolson, M.D., Lisa M. Montenegro, M.D., Gil Wernovsky, M.D., Sarah Tabbutt, M.D., Ph.D., Suzanne M. Durning, R.R.T., David M. Shera, Ph.D., J. William Gaynor, M.D., Thomas L. Spray, M.D., Robert R. Clancy, M.D., and Robert A. Zimmerman, M.D., all from the Neuro-Cardiac Research Program of The Children’s Hospital of Philadelphia, and John A. Detre, M.D., of the Hospital of the University of Pennsylvania.

John Ascenzi | EurekAlert!
Further information:
http://www.chop.edu

More articles from Health and Medicine:

nachricht How prenatal maternal infections may affect genetic factors in Autism spectrum disorder
22.03.2017 | University of California - San Diego

nachricht Camouflage apples
22.03.2017 | Empa - Eidgenössische Materialprüfungs- und Forschungsanstalt

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Giant Magnetic Fields in the Universe

Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.

The results will be published on March 22 in the journal „Astronomy & Astrophysics“.

Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...

Im Focus: Tracing down linear ubiquitination

Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.

Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...

Im Focus: Perovskite edges can be tuned for optoelectronic performance

Layered 2D material improves efficiency for solar cells and LEDs

In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...

Im Focus: Polymer-coated silicon nanosheets as alternative to graphene: A perfect team for nanoelectronics

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...

Im Focus: Researchers Imitate Molecular Crowding in Cells

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International Land Use Symposium ILUS 2017: Call for Abstracts and Registration open

20.03.2017 | Event News

CONNECT 2017: International congress on connective tissue

14.03.2017 | Event News

ICTM Conference: Turbine Construction between Big Data and Additive Manufacturing

07.03.2017 | Event News

 
Latest News

Pulverizing electronic waste is green, clean -- and cold

22.03.2017 | Materials Sciences

Astronomers hazard a ride in a 'drifting carousel' to understand pulsating stars

22.03.2017 | Physics and Astronomy

New gel-like coating beefs up the performance of lithium-sulfur batteries

22.03.2017 | Materials Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>