Nav: Home

High-dose iron pills do not improve exercise capacity for heart failure

May 16, 2017

Among patients with a certain type of heart failure and iron deficiency, high-dose iron pills did not improve exercise capacity over 16 weeks, according to a study published by JAMA.

Iron deficiency is present in approximately 50 percent of patients with heart failure with reduced left ventricular ejection fraction (HFrEF; ejection fraction: a measure of how well the left ventricle of the heart pumps with each contraction) and is associated with reduced functional capacity, poorer quality of life, and increased mortality.

Although results of intravenous iron repletion trials in iron-deficient heart failure patients have been favorable, regularly treating patients intravenously is expensive and poses logistical challenges. The effectiveness of inexpensive, readily available oral iron supplementation in heart failure is unknown. Gregory D. Lewis, M.D., of Massachusetts General Hospital, Boston, and colleagues randomly assigned 225 patients with HFrEF and iron deficiency to receive oral iron polysaccharide (n = 111) or placebo (n = 114), 150 mg twice daily for 16 weeks.

The researchers found that the primary measured outcome, change in peak oxygen uptake (reflects mechanisms by which iron repletion is expected to improve systemic oxygen delivery and use) from study entry to 16 weeks did not significantly differ between the two groups. There were also no significant differences between treatment groups in changes in 6-minute walk distance.

Several limitations of the study are noted in the article, including that it was not powered to detect differences in clinical events or safety end points.

"These results do not support use of oral iron supplementation in patients with HFrEF," the authors write.
-end-
For more details and to read the full study, please visit the For The Media website.

(doi:10.1001/jama.2017.5427)

Editor's Note: Please see the article for additional information, including other authors, author contributions and affiliations, financial disclosures, funding and support, etc.

To place an electronic embedded link to this study in your story This link will be live at the embargo time: http://jamanetwork.com/journals/jama/fullarticle/10.1001/jama.2017.5427

The JAMA Network Journals

Related Heart Failure Articles:

Type 2 diabetes may affect heart structure and increase complications and death among heart failure patients of Asian ethnicity
The combination of heart failure and Type 2 diabetes can lead to structural changes in the heart, poorer quality of life and increased risk of death, according to a multi-country study in Asia.
Preventive drug therapy may increase right-sided heart failure risk in patients who receive heart devices
Patients treated preemptively with drugs to reduce the risk of right-sided heart failure after heart device implantation may experience the opposite effect and develop heart failure and post-operative bleeding more often than patients not receiving the drugs.
How the enzyme lipoxygenase drives heart failure after heart attacks
Heart failure after a heart attack is a global epidemic leading to heart failure pathology.
Novel heart pump shows superior outcomes in advanced heart failure
Severely ill patients with advanced heart failure who received a novel heart pump -- the HeartMate 3 left ventricular assist device (LVAD) -- suffered significantly fewer strokes, pump-related blood clots and bleeding episodes after two years, compared with similar patients who received an older, more established pump, according to research presented at the American College of Cardiology's 68th Annual Scientific Session.
NSAID impairs immune response in heart failure, worsens heart and kidney damage
Non-steroidal anti-inflammatory drugs, or NSAIDs, are widely known as pain-killers and can relieve pain and inflammation.
More Heart Failure News and Heart Failure Current Events

Best Science Podcasts 2019

We have hand picked the best science podcasts for 2019. Sit back and enjoy new science podcasts updated daily from your favorite science news services and scientists.
Now Playing: TED Radio Hour

Erasing The Stigma
Many of us either cope with mental illness or know someone who does. But we still have a hard time talking about it. This hour, TED speakers explore ways to push past — and even erase — the stigma. Guests include musician and comedian Jordan Raskopoulos, neuroscientist and psychiatrist Thomas Insel, psychiatrist Dixon Chibanda, anxiety and depression researcher Olivia Remes, and entrepreneur Sangu Delle.
Now Playing: Science for the People

#537 Science Journalism, Hold the Hype
Everyone's seen a piece of science getting over-exaggerated in the media. Most people would be quick to blame journalists and big media for getting in wrong. In many cases, you'd be right. But there's other sources of hype in science journalism. and one of them can be found in the humble, and little-known press release. We're talking with Chris Chambers about doing science about science journalism, and where the hype creeps in. Related links: The association between exaggeration in health related science news and academic press releases: retrospective observational study Claims of causality in health news: a randomised trial This...