Featured Research

from universities, journals, and other organizations

Common erectile dysfunction drug not helpful for heart failure patients, study finds

Date:
March 11, 2013
Source:
Mayo Clinic
Summary:
A commonly used erectile dysfunction drug, sildenafil, doesn't help patients who have heart failure with preserved ejection fraction, a condition in which the heart's lower chambers are stiff and cannot relax and fill fully between beats, according to results of a new study.

A commonly used erectile dysfunction drug, sildenafil, doesn't help patients who have heart failure with preserved ejection fraction, a condition in which the heart's lower chambers are stiff and cannot relax and fill fully between beats. That is the finding of the RELAX study, presented today at the American College of Cardiology's 62nd Annual Scientific Session and simultaneously published in The Journal of the American Medical Association. The study's lead author called the results disappointing.

Sildenafil, a phosphodiesterase-5 inhibitor, had shown encouraging results in smaller studies and in animal models.

In this study, researchers looked at the drug's effect on maximum exercise ability as assessed by peak oxygen consumption and on how far people could walk in six minutes, their clinical status and their heart structure and function. They found no benefit, says lead author Margaret Redfield, M.D., heart failure specialist and researcher at Mayo Clinic in Rochester, Minn.

"It was surprising and a disappointment, and it was contradictory to our hypothesis," says Dr. Redfield. "There are few options for help for these patients, and we hoped we would find something."

When the heart does not pump blood well, heart failure symptoms such as shortness of breath, fatigue and weakness can result.

The RELAX study is the first multicenter trial to look at the effect of therapy with sildenafil on this condition, also known as diastolic heart failure. The study was a double-blinded, placebo-controlled, randomized trial of 216 stable outpatients with heart failure (with an ejection fraction of greater than 50 percent) with reduced exercise capacity; the median age was 69. Participants were enrolled during a 3.5-year period from the nine U.S. centers including Mayo Clinic that make up the Heart Failure Clinical Research Network and 17 other centers in the United States and Canada.

"This was a very complex study and criteria for study participants were very strict," Dr. Redfield says. "But it's most likely that we didn't see the results we hoped for because this type of heart failure just does not respond to this drug."

The RELAX study was funded by National Heart, Lung, and Blood Institute grant HL84907 (original) and grant HL110262 (this grant cycle). The institute also funds the Heart Failure Clinical Research Network.


Story Source:

The above story is based on materials provided by Mayo Clinic. Note: Materials may be edited for content and length.


Journal Reference:

  1. Redfield MM, Chen HH, Borlaug BA, et al. Effect of Phosphodiesterase-5 Inhibition on Exercise Capacity and Clinical Status in Heart Failure With Preserved Ejection Fraction: A Randomized Clinical Trial. JAMA, 2013; DOI: 10.1001/jama.2013.2024

Cite This Page:

Mayo Clinic. "Common erectile dysfunction drug not helpful for heart failure patients, study finds." ScienceDaily. ScienceDaily, 11 March 2013. <www.sciencedaily.com/releases/2013/03/130311150819.htm>.
Mayo Clinic. (2013, March 11). Common erectile dysfunction drug not helpful for heart failure patients, study finds. ScienceDaily. Retrieved April 23, 2014 from www.sciencedaily.com/releases/2013/03/130311150819.htm
Mayo Clinic. "Common erectile dysfunction drug not helpful for heart failure patients, study finds." ScienceDaily. www.sciencedaily.com/releases/2013/03/130311150819.htm (accessed April 23, 2014).

Share This



More Health & Medicine News

Wednesday, April 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Big Pharma Braces for M&A Wave

Big Pharma Braces for M&A Wave

Reuters - Business Video Online (Apr. 22, 2014) Big pharma on the move as Novartis boss, Joe Jimenez, tells Reuters about plans to transform his company via an asset exchange with GSK, and Astra Zeneca shares surge on speculation that Pfizer is looking for a takeover. Joanna Partridge reports. Video provided by Reuters
Powered by NewsLook.com
Study Says Most Crime Not Linked To Mental Illness

Study Says Most Crime Not Linked To Mental Illness

Newsy (Apr. 22, 2014) A new study finds most crimes committed by people with mental illness are not caused by symptoms of their illness or disorder. Video provided by Newsy
Powered by NewsLook.com
Hagel Gets Preview of New High-Tech Projects

Hagel Gets Preview of New High-Tech Projects

AP (Apr. 22, 2014) Defense Secretary Chuck Hagel is given hands-on demonstrations Tuesday of some of the newest research from DARPA _ the military's Defense Advanced Research Projects Agency program. (April 22) Video provided by AP
Powered by NewsLook.com
How Smaller Plates And Cutlery Could Make You Feel Fuller

How Smaller Plates And Cutlery Could Make You Feel Fuller

Newsy (Apr. 22, 2014) NBC's "Today" conducted an experiment to see if changing the size of plates and utensils affects the amount individuals eat. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins