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Study Examines Ethnic Differences in Sleep Quality and Blood Pressure
October 30, 2007In the United States, African Americans have higher blood pressure and are at greater risk of hypertension than whites. In addition, African Americans report poorer sleep quality and exhibit a smaller nighttime decrease in blood pressure than whites, a phenomenon called blood pressure "dipping."
"This ethnic difference in blood pressure dipping may help explain why African Americans are at greater risk of hypertension," says Dr. Joel Hughes, Kent State assistant professor of psychology, "as a smaller dip in nighttime blood pressure has been associated with increased left ventricular mass and wall thickness in the heart."
In this month's issue of the American Journal of Hypertension, Hughes and his colleagues examine the possibility that sleep quality may help account for ethnic differences in blood pressure dipping. They found that African-American college students, compared to whites, spent less time in bed, slept for a shorter period of time and took longer to fall asleep. Thus, ethnic differences in sleep quality seemed to accompany ethnic differences in blood pressure dipping; however, it was not shown that these differences in sleep quality caused ethnic differences in nighttime blood pressure.
"Obviously, more research is needed," says Hughes. "There are too few studies of ethnic differences in sleep, and the importance of sleep for health is becoming increasingly recognized."
Kent State University
"Obviously, more research is needed," says Hughes. "There are too few studies of ethnic differences in sleep, and the importance of sleep for health is becoming increasingly recognized."
Kent State University
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High Blood Pressure Easy to Miss in Children with Kidney Disease
Spot blood pressure readings in children with chronic kidney disease often fail to detect hypertension - even during doctor's office visits - increasing a child's risk for serious heart problems, according to research from Johns Hopkins Children's Center and other institutions. A report of the findings appears online in the Journal of American Society of Nephrology.
Canadians finding it tough to shake the salt habit
Canadians know that too much salt isn't good for their diets, but half still continue to shake it on, according to a new study by University of Alberta researchers.
Night Beat, Overtime and a Disrupted Sleep Pattern Can Harm Officers' Health
A police officer who works the night shift, typically from 8 p.m. to 4 a.m., already is at a disadvantage when it comes to getting a good "night's" sleep.
At-risk college students reduce HBP, anxiety, depression through Transcendental Meditation
The Transcendental Meditation technique may be an effective method to reduce blood pressure, anxiety, depression, and anger among at-risk college students, according to a new study to be published in the American Journal of Hypertension, December 2009.
Fat collections linked to decreased heart function
Researchers from Boston University School of Medicine (BUSM) have shown that fat collection in different body locations, such as around the heart and the aorta and within the liver, are associated with certain decreased heart functions.
Young athletes need dual screening tests for heart defects, study suggests
To best detect early signs of life-threatening heart defects in young athletes, screening programs should include both popular diagnostic tests, not just one of them, according to new research from heart experts at Johns Hopkins.
Heart and bone damage from low vitamin D tied to declines in sex hormones
Researchers at Johns Hopkins are reporting what is believed to be the first conclusive evidence in men that the long-term ill effects of vitamin D deficiency are amplified by lower levels of the key sex hormone estrogen, but not testosterone.
New study links vitamin D deficiency to cardiovascular disease and death
While mothers have known that feeding their kids milk builds strong bones, a new study by researchers at the Heart Institute at Intermountain Medical Center in Salt Lake City suggests that Vitamin D contributes to a strong and healthy heart as well - and that inadequate levels of the vitamin may significantly increase a person's risk of stroke, heart disease, and death, even among people who've never had heart disease.
Early end to key study on benefits of niacin, a B vitamin, in keeping arteries open was premature
Heart experts at Johns Hopkins are calling premature the early halt of a study by researchers at Walter Reed Army Medical Center and Washington Hospital Center on the benefits of combining extended-release niacin, a B vitamin, with cholesterol-lowering statin medications to prevent blood vessel narrowing.
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