The death of newsman Tim Russert last month from a massive heart attack raised interest in new technologies that may better identify people at risk for life-threatening cardiac events. A test that one ...

Carotid artery disease is a common cause of stroke. It occurs when plaque builds up inside the carotid arteries. These are the arteries that supply oxygen-rich blood to the brain. There are two large ...

In 1665, English scientist Robert Hooke published Micrographia, a book full of drawings depicting views through what was then a novel invention: the microscope. Peering at a slice of cork through a ...

An Australian/German team has developed the world's smallest imaging device, at the thickness of a human hair. It's capable of traveling down the blood vessels of mice, offering unprecedented ...

A retinal artery occlusion is a blockage in one of the blood vessels that supplies your retina with blood. It usually occurs suddenly and can cause vision loss without causing pain. A retinal artery ...

The right coronary artery supplies blood to a part of the heart. To do this effectively, it branches off into smaller arteries, such as the conus artery and the sinoatrial nodal branch. Each branch ...