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.
You had an EKG (electrocardiogram), stress test, or other test with results that suggested heart disease; Cardiac catheterization also might be used if your doctor thinks you have a heart defect or if you're about to have heart surgery. The procedure shows the overall shape of your heart and the four large spaces (heart chambers) inside it.