Adding another twist to the ongoing debate over the value of an herbal treatment for patients with heart failure, a new review of existing research suggests that hawthorn extract "significantly" improves symptoms.
"If I had chronic heart failure, I certainly would consider (using) it," said review co-author Dr. Max Pittler, deputy director of complementary medicine at Peninsula Medical School in Exeter, England.
The review does not include results of a large new study-unpublished to date-that suggested hawthorn has only a limited affect on lifespan.
At issue is heart failure, a common condition that is both debilitating and deadly. An estimated five million Americans suffer from heart failure, which is often the result of clogged arteries that put stress on the heart by forcing it to work harder.
As a result, the heart becomes larger while failing to effectively move blood around the body. This causes fluids to build up in the legs and lungs, often causing shortness of breath and other symptoms.
Perhaps the most famous heart failure patient is Vice President Dick Cheney, who has suffered from a long history of cardiac problems and has a defibrillator implanted in his chest.
According to the new review, the hawthorn bush produces one of the most commonly used herbal medicines in the United States. Many believe that hawthorn extract improves heart health, lowers cholesterol and boosts antioxidant levels.
To determine whether hawthorn is actually an effective treatment, Pittler and colleagues searched the medical literature for high-quality studies into the use of the herb in chronic heart failure patients.
The review of the studies appears in the latest issue of The Cochrane Library, a publication of The Cochrane Collaboration, an international organization that evaluates medical research. Systematic reviews like this one draw evidence-based conclusions about medical practice after considering both the content and quality of existing medical trials on a topic.
The researchers found 14 studies that met their criteria, several of which looked at the use of hawthorn as an addition to conventional medications.
The review authors combined the results of 10 studies of 855 patients into a meta-analysis. Compared to placebo, hawthorn extract boosted the maximum level of physiological workload-a fact that the review authors described as significant, although they acknowledged they based the finding on small numbers of studies and patients.
