英语科普：现代青少年心脏健康状况令人担忧-英语网刊-在线英语听力室

A new study that takes a complete snapshot of adolescent cardiovascular（心血管的） health in the United States reveals a dismal（凄凉的） picture of teens who are likely to die of heart disease at a younger age than adults do today, reports Northwestern Medicine research. "We are all born with ideal cardiovascular health, but right now we are looking at the loss of that health in youth," said Donald Lloyd-Jones, M.D., chair and associate professor of preventive medicine at Northwestern University Feinberg School of Medicine and a physician at Northwestern Memorial Hospital. "Their future is bleak（荒凉的） ."

Lloyd-Jones is the senior investigator of the study presented Nov. 16 at the American Heart Association Scientific Sessions in Orlando.

The effect of this worsening teen health is already being seen in young adults. For the first time, there is an increase in cardiovascular mortality rates in younger adults ages 35 to 44, particularly in women, Lloyd-Jones said.

The alarming health profiles of 5,547 children and adolescents, ages 12 to 19, reveal many have high blood sugar levels, are obese or overweight, have a lousy diet, don't get enough physical activity and even smoke, the new study reports. These youth are a representative sample of 33.1 million U.S. children and adolescents from the 2003 to 2008 National Health and Nutrition Examination Surveys.

"Cardiovascular disease is a lifelong process," Lloyd-Jones said. "The plaques that kill us in our 40s and 50s start to form in adolescence and young adulthood. These risk factors really matter."

"After four decades of declining deaths from heart disease, we are starting to lose the battle again," Lloyd-Jones added.

The American Heart Association (AHA) defines ideal cardiovascular health as having optimum（最适宜的） levels of seven well-established cardiovascular risk factors, noted lead study author Christina Shay, who did the research while she was a postdoctoral fellow in preventive medicine at Northwestern's Feinberg School. Shay now is an assistant professor of epidemiology（流行病学） at the University of Oklahoma Health Sciences Center.

"What was most alarming about the findings of this study is that zero children or adolescents surveyed met the criteria for ideal cardiovascular health," Shay said. "These data indicate ideal cardiovascular health is being lost as early as, if not earlier than the teenage years."

英语科普