David Wilber of Loyola University Medical Center in Illinois was the lead writer of a report about the study. He says catheter ablation worked in sixty to seventy percent of the patients. By comparison, abnormal heartbeats returned in eighty to ninety percent of those treated with drugs.
Doctor Wilber says catheter ablation is not meant to be the first treatment choice for atrial fibrillation. He suggests it only when drug therapy fails to work. The report appeared in the Journal of the American Medical Association.
(MUSIC)
BOB DOUGHTY: A report in the journal Current Biology says fish and other food thrown from boats can influence the movement of birds. A team of scientists used satellite information about a fishing area near the Mediterranean coast of Spain. Satellite images followed the travels of two kinds of seabirds: the Cory’s shearwaters and the Balearic shearwaters. The team learned that the birds traveled one way on days when fishing was permitted, and another way when it was not.
The scientists kept detailed records of the birds’ travel over a number of flights. The trips lasted an average of about two days. Some birds flew ten kilometers during that time. But others traveled up to one thousand kilometers. The birds traveled longer distances when they did not see fishing boats. The birds spread out from one another to do this, and they spread with increasing speed.
FAITH LAPIDUS: The lead scientist was Frederic Bartumeus of the Center for Advanced Studies of Blanes in Spain. He calls the actions of the seabirds, a superdiffusive process. The process let them look effectively for small hake and other fish that move often and unpredictably. But when the birds saw fishing boats, they looked for food near the boats. That reduced their spreading action and slowed their speed.
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2013-11-25
2013-11-25
2013-11-25
2013-11-25
2013-11-25
2013-11-25