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.
Also known as heart catheterization, cardiac catheterization is a test that allows your doctor to examine the chambers, valves and arteries of your heart. This test is conducted in a special room called the catheterization laboratory (cath lab). Using dye to highlight your veins and arteries, your doctor can view your heart in action with a type of X-ray machine called a fluoroscope.