Statin drugs may help patients with heart valve disease avoid surgery

ROCHESTER, Minn. -- A study by Mayo Clinic researchers indicates that narrowing of the heart's "exit valve" is less than half as likely to worsen in patients taking statin drugs, as compared with similar patients not taking the cholesterol-lowering medications. The findings, which could lead to the first nonsurgical treatment for aortic stenosis, are reported in the Nov. 20, 2002, issue of the Journal of the American College of Cardiology.

The aortic valve is the one-way gate between the heart's main pumping chamber and the rest of the body. In aortic stenosis, this valve becomes narrowed and causes the heart to work harder. The only treatment for severe aortic stenosis is surgical replacement of the valve.

A new understanding of the aortic stenosis disease process led to the statin study. "In the past few years there has been a total change in our way of thinking, because we realized that what was happening on the aortic valve was a phenomenon similar to atherosclerosis," says Maurice Sarano, M.D., the Mayo Clinic cardiologist who led the study. "Since the disease process is similar to what happens when plaques cause blockages in arteries, reducing the risk factors that lead to heart attack may also help keep the valve from narrowing."

Dr. Sarano and his colleagues screened all adults with aortic stenosis in Olmsted County, Minn. They measured the extent of aortic stenosis using ultrasound and then followed 156 patients for an average of 3.7 years. Because of the close association between high cholesterol and atherosclerosis, the researchers first looked for a link between cholesterol levels and worsening of aortic stenosis. "We were initially somewhat disappointed, because we saw absolutely no association," says Dr. Sarano.

However, when they compared changes in aortic stenosis measurements between the 38 patients who were taking cholesterol-lowering statin drugs and the 118 patients who were not on statin therapy, the statin-th

Contact: Lee Aase
Mayo Clinic

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