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.
5 tests to better predict heart disease risk: A 12-lead EKG provides information about hypertrophy, or thickening of the heart muscle. A coronary calcium scan, a low-radiation imaging test, identifies calcified plaque buildup in the arteries of the heart. A blood test for C-reactive protein indicates inflammation.