Over the long run, however, the policies of the one-drop rule and segregation, in conjunction with other factors such as a long tradition of racial nationalism and white liberal support, generated a counter-reaction that led to a very different form of racial politics.
Learn about these ultrasound-like tests of the heart -- and find out what to expect -- here. Cardiac Catheterization. Cardiac catheterization -- also called a coronary angiogram -- means running a catheter into your heart. It's done to help doctors see what's going on in there, and whether they need to operate. Here's where to learn about it.
A new assay searches the bloodstream for cells that come from damaged arteries plagued by plaque. A simple blood test developed by scientists at the Scripps Research Institute in California could prove effective in predicting a heart attack. The test, reported on today in the journal Physical Biology, identifies endothelial cells in the bloodstream.