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Fish oil prevents potentially deadly decline in heart rate variability
December 16, 2005A two-gram fish oil supplement given daily to elderly persons prevented a decline in heart rate variability caused by tiny, dangerous airborne pollutant particles. Heart rate variability, a measure of the autonomic nervous system's regulation of the heart, is an independent risk factor for cardiac arrhythmias, heart attack or sudden death.
These findings appeared in the second issue of the December 2005 American Journal of Respiratory and Critical Care Medicine, published by the American Thoracic Society.
Fernando Holguin, M.D., of the Centers for Disease Control and Prevention in Atlanta, Georgia, and eight associates provided fish oil supplements to 26 residents of a nursing home in Mexico City. A control group of 24 residents was given soy oil supplements. The participants' average age ranged from 81 to 83 years old.
"In this randomized controlled trial, fish oil supplementation prevented the reduction in heart rate variability associated with the same-day exposure to indoor particulate matter," said Dr. Holguin. "In contrast, soy oil, our comparison supplementation of plant-derived polyunsaturated fatty acids, was associated with a marginal, nonsignificant protection from the effects of particulate matter on heart rate variability."
"Fish oil as a source of omega-3 polyunsaturated fatty acids could be considered as a potential form of preventive measure to reduce the risk of arrhythmia and sudden death in elderly subjects exposed to ambient air pollution," said Dr. Holguin.
In the study, the residents were exposed to tiny indoor air pollutant particles that had a dimension of 2.5 microns or less. All participants spent 92 percent of their time indoors.
The supplement study was conducted over six months. None of the patients suffered from cardiac arrhythmias, had a pacemaker or were being treated with oral anticoagulants.
Participants had their heart rate variability checked between 8 a.m. and 1 p.m. on alternate weekdays. To ensure accurate measurement, the subjects lay flat on their back five minutes before starting the test. Each electronic analysis lasted 6 minutes as each participant rested.
Prior to the beginning of the study, all participants had a low intake of omega-3 polyunsaturated fatty acids.
The authors called for larger studies to confirm their results.
American Thoracic Society
"In this randomized controlled trial, fish oil supplementation prevented the reduction in heart rate variability associated with the same-day exposure to indoor particulate matter," said Dr. Holguin. "In contrast, soy oil, our comparison supplementation of plant-derived polyunsaturated fatty acids, was associated with a marginal, nonsignificant protection from the effects of particulate matter on heart rate variability."
"Fish oil as a source of omega-3 polyunsaturated fatty acids could be considered as a potential form of preventive measure to reduce the risk of arrhythmia and sudden death in elderly subjects exposed to ambient air pollution," said Dr. Holguin.
In the study, the residents were exposed to tiny indoor air pollutant particles that had a dimension of 2.5 microns or less. All participants spent 92 percent of their time indoors.
The supplement study was conducted over six months. None of the patients suffered from cardiac arrhythmias, had a pacemaker or were being treated with oral anticoagulants.
Participants had their heart rate variability checked between 8 a.m. and 1 p.m. on alternate weekdays. To ensure accurate measurement, the subjects lay flat on their back five minutes before starting the test. Each electronic analysis lasted 6 minutes as each participant rested.
Prior to the beginning of the study, all participants had a low intake of omega-3 polyunsaturated fatty acids.
The authors called for larger studies to confirm their results.
American Thoracic Society
Fish Oil Current Events and Fish Oil News RSSGrains and lamb offer new sources of omega-3
CSIRO research on grains and lamb aimed at developing new dietary sources of long-chain omega-3 oils will be presented at the World Congress on Oils and Fats in Sydney this week.
Half of the fish consumed globally is now raised on farms, study finds
Aquaculture, once a fledgling industry, now accounts for 50 percent of the fish consumed globally, according to a new report by an international team of researchers. And while the industry is more efficient than ever, it is also putting a significant strain on marine resources by consuming large amounts of feed made from wild fish harvested from the sea, the authors conclude.
Study reveals mounting evidence of fish oil's heart health benefits
There is mounting evidence that omega-3 fatty acids from fish or fish oil supplements not only help prevent cardiovascular diseases in healthy individuals, but also reduce the incidence of cardiac events and mortality in patients with existing heart disease.
The 'see food' diet
Current research suggests that a diet high in omega-3 fatty acids may help prevent one of the leading causes of legal blindness among the elderly.
Researchers find that eating high levels of fructose impairs memory in rats
Researchers at Georgia State University have found that diets high in fructose - a type of sugar found in most processed foods and beverages - impaired the spatial memory of adult rats.
Edible coating makes fish filets longer-lasting, healthier
Consumers may be able to eat longer-lasting, potentially healthier fish fillets if research at Oregon State University makes its way to the supermarket.
Children's Hospital Oakland scientist characterizes new syndrome of allergy, apraxia, malabsorption
A landmark study conducted by Children's Hospital & Research Center Oakland is the first to reveal a new syndrome in children that presents with a combination of allergy, apraxia and malabsorption. Autism spectrum disorders were variably present.
Omega fatty acid balance can alter immunity and gene expression
For the past century, changes in the Western diet have altered the consumption of omega-6 fatty acids (w6, found in meat and vegetable oils) compared with omega-3 fatty acids (w3, found in flax and fish oil).
Eating fatty fish and marine omega-3 fatty acids may reduce risk of heart failure
Eating fatty fish and marine omega-3 fatty acids, which are found in fish oil, seems to protect men from heart failure according to one of the largest studies to investigate the association.
Eating fatty fish once a week reduces men's risk of heart failure
Eating salmon or other fatty fish just once a week helped reduce men's risk of heart failure, adding to growing evidence that omega-3 fatty acids are of benefit to cardiac health. Led by researchers at Beth Israel Deaconess Medical Center (BIDMC) and reported in today's on-line issue of the European Heart Journal, the findings represent one of the largest studies to investigate the association.
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