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Home NEWS Science News Health

Some heart attack patients may not benefit from beta blockers

Bioengineer by Bioengineer
May 29, 2017
in Health
Reading Time: 4 mins read
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New research challenges established medical practice that all heart attack patients should be on beta blockers.

The study — by a research team at the University of Leeds – looked at patients who had a heart attack but did not suffer heart failure — a complication of a heart attack where the heart muscle is damaged and ceases to function properly.

It found that heart attack patients who did not have heart failure did not live any longer after being given beta blockers — yet around 95% of patients who fall into this category end up on the medication.

Beta blockers are a powerful group of medicines which decrease the activity of the heart and lower blood pressure. They are commonly prescribed after a heart attack, but they can have unwanted side-effects for some patients such as dizziness and tiredness.

Not all people who have their first heart attack have heart failure. Patients with a heart attack and heart failure need to be on beta blockers because the drugs help the damaged heart to work more effectively.

The University of Leeds investigation, though, focused on those patients with heart attack who did not have heart failure but were still prescribed beta blockers.

The study wanted to see if being on beta blockers made any difference to the chances of these patients being alive one year after their heart attack.

The research — published in the Journal of the American College of Cardiology — raises the possibility that the drugs are being over prescribed, and may burden patients and the NHS with unnecessary medicine costs.

UK medical guidelines recommend that beta blockers should be prescribed to all patients who have had a heart attack — irrespective of whether they have heart failure.

The University of Leeds research team analysed data from the UK's national heart attack register which collects information on people hospitalised following a heart attack. They looked at anonymised data from more than 179,000 patients who had a heart attack without heart failure. When investigators compared death rates within a year of the patients suffering a heart attack, they found no statistical difference between those who'd been prescribed the drugs and those who had not.

Dr Marlous Hall, lead investigator and senior epidemiologist at the Leeds Institute of Cardiovascular and Metabolic Medicine, said: "If you look at the patients who had a heart attack but not heart failure — there was no difference in survival rates between those who had been prescribed beta blockers and those that had not."

"This was an observational study based on robust statistical analysis of large scale patient data. What we need now is a randomised patient trial. We were investigating one outcome – did beta blockers increase a patient's chances of survival? A trial would allow researchers to substantiate these findings and also look at other outcomes, such as whether beta blockers prevent future heart attacks. This work would have implications for personalising medications after a heart attack."

Chris Gale, Professor of Cardiovascular Medicine at the University of Leeds and Consultant Cardiologist at York Teaching Hospital Trust, said: "There is uncertainty in the evidence as to the benefit of beta-blockers for patients with heart attack and who do not have heart failure. This study suggests that there may be no mortality advantage associated with the prescription of beta-blockers for patients with heart attack and no heart failure. A necessary next step is the investigation of beta-blockers in this population in a randomised controlled trial".

The British Heart Foundation says there are around 950,000 people in the UK who have survived a heart attack.

###

The study was funded by the British Heart Foundation.

Notes to Editors

For further details, please contact the press office at the University of Leeds at [email protected] or contact the duty press officer on +(44) 07712389448

About University of Leeds

The University of Leeds is one of the largest higher education institutions in the UK, with more than 33,000 students from 147 different countries, and a member of the Russell Group research-intensive universities. We are a top 10 university for research and impact power in the UK, according to the 2014 Research Excellence Framework, and positioned as one of the top 100 best universities in the world in the 2015 QS World University Rankings. We are The Times and The Sunday Times University of the Year 2017 http://www.leeds.ac.uk

British Heart Foundation

For over 50 years we've pioneered research that's transformed the lives of people living with heart and circulatory conditions. Our work has been central to the discoveries of vital treatments that are changing the fight against heart disease. But so many people still need our help. From babies born with life-threatening heart problems to the many Mums, Dads and Grandparents who survive a stroke or heart attack. Every pound raised, minute of your time and donation to our shops will help make a difference to people's lives.

Media Contact

University of Leeds Press Office
[email protected]
07-712-389-448
@universityleeds

http://www.leeds.ac.uk

############

Story Source: Materials provided by Scienmag

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