Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Eating fatty fish once a week reduces men's risk of heart failure

24.04.2009
Omega-3 fatty acids in fish oils are also beneficial

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.

"Previous research has demonstrated that fatty fish and omega-3 fatty acids help to combat risk factors for a range of heart-related conditions, such as lowering triglycerides [fats in the blood] reducing blood pressure, heart rate and heart rate variability," explains first author Emily Levitan, PhD, a research fellow in the Cardiovascular Epidemiology Research Center at BIDMC. "Collectively, this may explain the association with the reduced risk of heart failure found in our study."

A life-threatening condition that develops when the heart can no longer pump enough blood to meet the body's needs, heart failure (also known as congestive heart failure) is usually caused by existing cardiac conditions, including high blood pressure and coronary artery disease. Heart failure is the leading cause of hospitalization among patients 65 and older, and is characterized by such symptoms as fatigue and weakness, difficulty walking, rapid or irregular heartbeat, and persistent cough or wheezing.

The researchers followed 39,367 Swedish men between the ages of 45 and 79 from 1998 to 2004. The researchers recorded details of the men's diet and tracked the men's outcome through Swedish inpatient hospital registers and cause-of-death registers. During this period, 597 men in the study (with no previous history of heart disease or diabetes) developed heart failure. Thirty-four men died.

Analysis of their numbers showed that the men who ate fatty fish (herring, mackerel, salmon, whitefish and char) once a week were 12 percent less likely to develop heart failure, compared with men who ate no fatty fish. Although this association did not reach statistical significance, notes Levitan, the researchers also found a statistically significant association with the intake of marine omega-3 fatty acids, which are found in cod liver and other fish oils: The men who consumed approximately 0.36 grams a day were 33 percent less likely to develop heart failure than the men who consumed little or no marine omega-3 fatty acids.

"We divided the men into five groups based on their intake of fatty fish," explains Levitan. "The first group consumed little or no fatty fish; at the other end of the spectrum, the fifth group consumed significant quantitities, three or more servings per week. We found that while the 'middle group' – who ate one serving per week – had a 12 percent reduced risk of heart failure, the next two groups, who ate either two servings a week or three or more servings a week, had nearly the same heart failure risk as the men who ate no fish at all."

The findings were similar when the researchers looked at fish oil consumption: Among five groups based on fish oil consumption, the middle group, who consumed 0.36 grams per day of omega-3 fatty acids showed a 33 percent reduced risk of heart failure, while the men who consumer greater quantities (approximately 0.46 grams per day or 0.71 grams per day) had a risk of heart failure similar to the men who consumed little or no fish oils.

"The higher rates of heart failure in men who consumed the most fatty fish or marine omega-3 fatty acids compared with the men who had moderate consumption may be due to chance," explains Levitan. Alternatively, she explains, the men who ate more fish may already be in poor health, and may be trying to improve their health through fish consumption.

"Our study reinforces the current recommendations for moderate consumption of fatty fish," notes Levitan. "Current guidelines from the American Heart Association recommend eating fatty fish twice a week. It will be important, going forward, to replicate these findings in other populations, particularly those including women, as our study looked at men only."

Study coauthors include senior author Murray Mittleman of BIDMC's Cardiovascular Epidemiology Research Unit and Alicja Wolk of the Karolinska Institute, Sweden.

This study was supported, in part, by grants from the Swedish Foundation for International Cooperation in Research and Higher Education; and the National Heart, Lung and Blood Institute, National Institutes of Health.

Beth Israel Deaconess Medical Center is a patient care, teaching and research affiliate of Harvard Medical School and consistently ranks in the top four in National Institutes of Health funding among independent hospitals nationwide. BIDMC is a clinical partner of the Joslin Diabetes Center and is a research partner of the Dana-Farber/Harvard Cancer Center. BIDMC is the official hospital of the Boston Red Sox.

Bonnie Prescott | EurekAlert!
Further information:
http://www.bidmc.harvard.edu

More articles from Health and Medicine:

nachricht Organ-on-a-chip mimics heart's biomechanical properties
23.02.2017 | Vanderbilt University

nachricht Researchers identify cause of hereditary skeletal muscle disorder
22.02.2017 | Klinikum der Universität München

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: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

From rocks in Colorado, evidence of a 'chaotic solar system'

23.02.2017 | Physics and Astronomy

'Quartz' crystals at the Earth's core power its magnetic field

23.02.2017 | Earth Sciences

Antimicrobial substances identified in Komodo dragon blood

23.02.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>