VOA慢速英语 生物标志物对预测心脏病帮助甚微

　　Biomarkers Show Little Help in Predicting Heart Disease

　　生物标志物对预测心脏病帮助甚微

　　This is the VOA Special English Health Report.

　　Cardiovascular disease is the world's leading cause of death. It includes heart attack, stroke and high blood pressure. Over the years, researchers have identified several substances in the blood that can serve as what they call cardiac biomarkers. These are used to measure the presence and development of cardiovascular disease. Researchers have increasingly tried to use these biomarkers to identify people who are at high risk of developing heart disease. But a new study has found that they offer little help in this way.

　　A team from Massachusetts General Hospital and Sweden's Lund University studied how effective the biomarkers are as predictors. Thomas Wang at the Mass General Heart Center was the senior author of the study. THOMAS WANG: "What we found is that, in fact, even after measuring those additional biomarkers that there wasn't a great deal of benefit in terms of understanding who was more likely to develop heart disease" Doctor Wang says they did identify some combinations of biomarkers that improved predictions of heart attacks and strokes. But, he says, there is not enough evidence to justify measuring these in everybody. THOMAS WANG: "It's still possible that in certain patients, measuring these biomarkers would be helpful. There are some patients for whom physicians are really on the fence about whether to give one therapy or another. And in those cases having the biomarker which adds a little bit of information may be helpful in terms of decision making. But for the majority of patients, having the information of the biomarker probably wouldn't make a difference." Doctor Wang hopes future research will discover biomarkers that are better able to predict the risk of cardiovascular disease. But for now, he says, doctors should depend on traditional risk factors. These include a history of high blood pressure, high cholesterol, tobacco use, diabetes, obesity, physical inactivity or poor nutrition.

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