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Heart Failure Drug May Only Help Heart's Function, Not Symptoms
Date:2/27/2013

By Amy Norton
HealthDay Reporter

TUESDAY, Feb. 26 (HealthDay News) -- A drug often used to treat chronic heart failure may not ease symptoms in people with one form of the disease, a new study suggests.

The medication, called spironolactone (Aldactone), failed to improve symptoms or quality of life among 422 patients with diastolic heart failure -- a form of the disease that affects about half of all people with heart failure.

The drug did, however, benefit the structure and function of patients' hearts. And experts said it's too early to know what to make of the results, which appear in the Feb. 27 issue of the Journal of the American Medical Association.

"It would be premature to say this is not beneficial," said Dr. Sanjiv Shah, a cardiologist at Northwestern University Feinberg School of Medicine, in Chicago, who was not involved in the study.

Shah is involved in an ongoing study of spironolactone's effects in people with diastolic heart failure. And that trial is focusing on the big questions: Can the drug prevent or delay hospitalizations, or prolong people's lives?

Spironolactone is in a class of drugs called aldosterone receptor antagonists. They cause the kidneys to eliminate excess water and sodium from the body, so they can lower blood pressure and get rid of fluid build-up in some people with heart failure.

And studies have shown that spironolactone can extend the lives of some heart failure patients -- namely, those with a low "ejection fraction." That means the percentage of blood pushed out by the heart with each contraction is abnormally low.

The problem is that heart failure is "heterogeneous," according to Shah, who described it as a "syndrome" -- or a collection of signs and symptoms -- rather than a disease. So a treatment that works for some patients may not work as well for others.

In general, heart failure is a chronic condition where the heart doe
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