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.
General Heart Tests. 1  Electrocardiogram (ECG) - helps evaluate the electrical activity of the heart. 2  Echocardiogram - helps to evaluate the anatomy and function of the heart. 3  Stress Testing - assesses cardiovascular fitness, and helps detect signs of coronary artery disease (CAD) and heart failure.