Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

High blood pressure in kids linked with sleep breathing problems

10.10.2006
This abstract is also the subject of a video news release

Children with high blood pressure may be at risk for sleep breathing disorders, according to a small study reported at the American Heart Association's 60th Annual Fall Conference of the Council for High Blood Pressure Research.

In the study, 60 percent of hypertensive children had a condition called sleep disordered breathing (SDB). SDB is characterized by short periods of upper airway obstructions that are complete (apnea) or partial (hypopnea), or a longer period of insufficient air movement (obstructive hypoventilation).

"SDB is important because it can result in daytime sleepiness, limited attention span, poor school performance, hyperactivity, poor growth and increased blood pressure in the lungs," said Alisa A. Acosta, M.D., lead author of the study and a Fellow in pediatric kidney disease and hypertension at the University of Texas Medical School at Houston.

"We know there's a link in adults between obstructive sleep apnea -- the most common of the SDBs -- and high blood pressure, so we were curious to see if the same link exists in our pediatric population," she said.

In obstructive sleep apnea (OSA), a person's airway repeatedly collapses or partially collapses during sleep. This results in brief periods of not breathing (apnea) followed by sudden attempts to breathe. The sleep disruptions lead to daytime fatigue and reduced cognitive performance. Another SDB, obstructive hypoventilation, is inadequate breathing to meet the body's needs.

Risk factors for SDB in children include obesity and enlarged tonsils. Some signs of SDB in a child include snoring, restless sleep, morning headaches and excessive daytime sleepiness.

Researchers evaluated 15 boys and five girls (ages 4 to 18) with primary hypertension who snored or had enlarged tonsils or night-time high blood pressure. Each participated in a one-night sleep study.

High blood pressure in children is defined by a measurement greater than the 95th percentile based on age, gender and height. Primary hypertension is high blood pressure that's not linked to other causes or conditions. About 1 percent to 3 percent of kids in the United States have hypertension. In a previous study, the group found 3 percent to 4 percent of children and adolescents in Houston have primary hypertension.

Of the 20 children, 11 had nighttime high blood pressure; 17 had enlarged tonsils and adenoids; 18 were overweight (body mass index greater than 85th percentile), and all had a history of snoring.

In the sleep study, researchers measured blood oxygen levels, airflow rates, and brain activity to look for levels that would indicate sleep disordered breathing.

Researchers found that 12 of the 20 children tested (60 percent) had SDB: seven (35 percent) had obstructive sleep apnea (more than one apnea episode per hour); four (20 percent) had obstructive hypoventilation; and one (5 percent) had mild SDB. Of the remaining eight children, six (30 percent) had a primary snoring disorder without SDB, and two had a normal sleep pattern without snoring.

The prevalence of SDB in all children is 2 percent. In addition, 40 percent of children with enlarged tonsils and 46 percent of obese children have SDB. In comparison, the current study of hypertensive children shows 59 percent (10 patients) with enlarged tonsils and 65 percent (11 patients) with obesity had SDB.

"Hypertension appears to be an additional risk factor for SDB, and further studies are needed to explore the relationship between the two," Acosta said.

Therapies for children with hypertension and SDB start with lifestyle changes, Acosta said. "We stress therapeutic lifestyle changes such as weight loss in all overweight kids and a low-salt diet." The children also need further evaluation by an ear, nose and throat (ENT) specialist.

Wynette Randolph | EurekAlert!
Further information:
http://www.americanheart.org

More articles from Health and Medicine:

nachricht How cancer metastasis happens: Researchers reveal a key mechanism
19.01.2018 | Weill Cornell Medicine

nachricht Researchers identify new way to unmask melanoma cells to the immune system
17.01.2018 | Duke University Medical Center

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: Optical Nanoscope Allows Imaging of Quantum Dots

Physicists have developed a technique based on optical microscopy that can be used to create images of atoms on the nanoscale. In particular, the new method allows the imaging of quantum dots in a semiconductor chip. Together with colleagues from the University of Bochum, scientists from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute reported the findings in the journal Nature Photonics.

Microscopes allow us to see structures that are otherwise invisible to the human eye. However, conventional optical microscopes cannot be used to image...

Im Focus: Artificial agent designs quantum experiments

On the way to an intelligent laboratory, physicists from Innsbruck and Vienna present an artificial agent that autonomously designs quantum experiments. In initial experiments, the system has independently (re)discovered experimental techniques that are nowadays standard in modern quantum optical laboratories. This shows how machines could play a more creative role in research in the future.

We carry smartphones in our pockets, the streets are dotted with semi-autonomous cars, but in the research laboratory experiments are still being designed by...

Im Focus: Scientists decipher key principle behind reaction of metalloenzymes

So-called pre-distorted states accelerate photochemical reactions too

What enables electrons to be transferred swiftly, for example during photosynthesis? An interdisciplinary team of researchers has worked out the details of how...

Im Focus: The first precise measurement of a single molecule's effective charge

For the first time, scientists have precisely measured the effective electrical charge of a single molecule in solution. This fundamental insight of an SNSF Professor could also pave the way for future medical diagnostics.

Electrical charge is one of the key properties that allows molecules to interact. Life itself depends on this phenomenon: many biological processes involve...

Im Focus: Paradigm shift in Paris: Encouraging an holistic view of laser machining

At the JEC World Composite Show in Paris in March 2018, the Fraunhofer Institute for Laser Technology ILT will be focusing on the latest trends and innovations in laser machining of composites. Among other things, researchers at the booth shared with the Aachen Center for Integrative Lightweight Production (AZL) will demonstrate how lasers can be used for joining, structuring, cutting and drilling composite materials.

No other industry has attracted as much public attention to composite materials as the automotive industry, which along with the aerospace industry is a driver...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

10th International Symposium: “Advanced Battery Power – Kraftwerk Batterie” Münster, 10-11 April 2018

08.01.2018 | Event News

See, understand and experience the work of the future

11.12.2017 | Event News

Innovative strategies to tackle parasitic worms

08.12.2017 | Event News

 
Latest News

Rutgers scientists discover 'Legos of life'

23.01.2018 | Life Sciences

Seabed mining could destroy ecosystems

23.01.2018 | Earth Sciences

Transportable laser

23.01.2018 | Physics and Astronomy

VideoLinks Science & Research
Overview of more VideoLinks >>>