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.
The procedures performed in a cardiac cath lab almost always involve tiny, flexible tubes, called catheters, which can be use instead of surgery, to access the heart and blood vessels. A cath lab has special imaging equipment used to see the arteries and check how well blood is flowing to and from the heart. This information helps the care team to diagnose and treat blockages and other problems in the arteries.