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This is the VOA Special English Health Report, from http://voaspecialenglish.com | http://facebook.com/voalearningenglish

A study has raised questions about a widely held belief involving cholesterol. The belief is that high levels of so-called good cholesterol in the blood can reduce the risk of a heart attack. The medical name for "good" cholesterol is high-density lipoprotein, or HDL. Doctors commonly believe it reduces the risk of heart attack by removing fatty deposits that can block the flow of blood in the arteries of the heart. But Dr. Sekar Kathiresan at Massachusetts General Hospital in Boston says the effects of high HDL have never been proven. He says the new study that he and other researchers did suggests that HDL cholesterol does not affect the risk of heart attack. He thinks the study has now broken "the major assumption over the last thirty years, that if you raise HDL cholesterol, the risk for heart disease will be lowered."The researchers say about four percent of people have a genetic variant, a change, that gives them a naturally high level of HDL. The study found that those who were genetically "programmed" to have higher HDL levels were just as likely to suffer heart attacks as those who were not. A second analysis looked at fourteen gene variants that increase good cholesterol. Dr. Kathiresan says people with the most variants had no more protection against heart attacks than anyone else. But he says there is no dispute about low-density lipoprotein, or LDL. LDL, the so-called bad cholesterol, causes a buildup of fatty substances inside arteries and increases the risk of heart attack. The findings appear in the Lancet medical journal. Another widely held medical belief has also come into question recently. For years, men over the age of forty have been told to get a simple blood test to see if they have prostate cancer. Now, experts on a government committee are advising them not to. Dr. Virginia Moyer heads the United States Preventive Services Task Force. She says, "Close to two-thirds of older men have prostate cancer and yet the huge majority of them never have a problem from it in their lifetime." The task force examined two large studies before deciding that treating the cancer found by the PSA test can do more harm than good. Effects of the treatment can include a loss of sexual ability and bladder control, as well as other problems including heart attacks. Some doctors support the findings of the task force, but others disagree. Urologist Deepak Kapoor says in about twenty years of PSA testing, death rates for prostate cancer have dropped by thirty-eight percent. For VOA Special English, I'm Carolyn Presutti. (Adapted from a radio program broadcast 06Jun2012)

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  • 2012-07-11
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  • 2012-07-11
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From http://voaspecialenglish.com | http://facebook.com/voalearningenglish Cheetahs are beautiful and speedy. They can run as fast as 110 kilometers an hour. There once were more than 100,000 cheetahs living in Africa and Asia. Today only about 10,000 of the animals remain. Most are in 24 African countries. Laurie Marker is working to keep cheetahs from disappearing. LAURIE MARKER: "I started working with cheetahs when I lived in Oregon -- and I ran a wildlife park there; this was back in the ea...

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  • chanyi
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Captioned version: http://youtu.be/LNZr7pbZDYE From http://voaspecialenglish.com | http://facebook.com/voalearningenglish Premature birth is the second-greatest killer of babies worldwide, after pneumonia. A report called "Born Too Soon" says one in ten babies throughout the world is born before the 37th week of pregnancy. As a midwife, Carole Presern assists women who are giving birth. She also has seen newborns die. CAROLE PRESERN, PARTNERSHIP FOR MATERNAL, NEWBORN AND CHILD HEALTH: "It's a de...

VOA News Helping Premature Babies Survive file

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From http://voaspecialenglish.com | http://facebook.com/voalearningenglish Premature birth is the second-greatest killer of babies worldwide, after pneumonia. A report called "Born Too Soon" says one in ten babies throughout the world is born before the 37th week of pregnancy. As a midwife, Carole Presern assists women who are giving birth. She also has seen newborns die. CAROLE PRESERN, PARTNERSHIP FOR MATERNAL, NEWBORN AND CHILD HEALTH: "It's a devastating experience. And it touches you. You r...

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This is the VOA Special English Health Report, from http://voaspecialenglish.com | http://facebook.com/voalearningenglish A study has raised questions about a widely held belief involving cholesterol. The belief is that high levels of so-called good cholesterol in the blood can reduce the risk of a heart attack. The medical name for "good" cholesterol is high-density lipoprotein, or HDL. Doctors commonly believe it reduces the risk of heart attack by removing fatty deposits that can block the fl...

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This is the VOA Special English Education Report, from http://voaspecialenglish.com | http://facebook.com/voalearningenglish South Korea's education system is highly respected. But there are concerns that academic dishonesty could harm its image in the world. That dishonesty includes cases of falsified research. And in recent months, two South Korean lawmakers have faced accusations that they copied work for their doctoral dissertations.Of course, problems like these are not limited to South Kor...

VOA News A Comic Book About Business Finance

  • chanyi
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This is the VOA Special English Economics Report, from http://voaspecialenglish.com | http://facebook.com/voalearningenglish You probably have heard of comic book heroes like Superman, Batman and Spiderman. But what about Tom the motorcycle shop owner, Joe Knight and Karen Berman? Tom, Joe and Karen all appear in a comic book called "Financial Intelligence." But Mr. Knight and Ms. Berman are real people. In two thousand six, they wrote a book called "Financial Intelligence: A Manager's Guide to ...

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