And, increasingly, it will be, the MRI study predicts. A common surgery to unclog neck arteries does not help prevent stroke unless the blood vessels are severely blocked, says a new study. According to findings published in last week's New England Journal of Medicine, the operation, known as an endarterectomy, is of no benefit to patients with carotid arteries that are less than 50 percent blocked. But the study confirmed that the procedure does help patients with blockages of 70 percent or more and that the benefits last for eight years after follow-up. Henry Barnett, a researcher at the Robarts Research Institute at the University of Western Ontario and the lead author of the study, said severe clots cause narrowing and roughness of artery walls.
Clots catch more easily . . .
Later they can float to the brain. Passengers caught sneaking a smoke will be put off the vessel at the next port and left to find their own way home. But regulators say that soy helps prevent heart disease only if consumers cut down on fat. The heroine of the popular Tomb Raider video games returns to her native London for her first urban adventure in the version coming out November 21.