Fish oil supplements may work slightly better than a popular cholesterol-reducing drug to help patients with chronic heart failure, according to new research.

Chronic heart failure is a condition that occurs when the heart becomes enlarged and cannot pump blood efficiently around the body.

With few effective options for heart failure patients, the findings could give patients a potential new treatment and could change the dietary recommendations for them, said Dr. Jose Gonzalez Juanatey, a spokesman for the European Society of Cardiology, who was not connected to the research.

“This reinforces the idea that treating patients with heart failure takes more than just drugs,” Juanatey said.

In the group of patients taking the fish oil pills, 1,981 died of heart failure or were admitted to the hospital with the problem. In the patients on placebo pills, 2,053 died or were admitted to the hospital for heart failure.

In a parallel study, the same team of Italian doctors gave 2,285 patients the drug rosuvastatin, also known as Crestor, and gave placebo pills to 2,289 people. Patients were then tracked for about four years. The doctors found little difference in heart failure rates between the two groups.

“It’s a small benefit, but we should always be emphasizing to patients what they can do in terms of diet that might help,” said Dr. Richard Bonow, chief of cardiology at Northwestern University Hospital in Chicago and past president of the American Heart Association.

Fish oils also are thought to increase the body’s good cholesterol levels, as well as possibly stabilizing the electrical system in heart cells, to prevent abnormal heart rhythms.