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.
Your doctor may use an echo test to look at your heartâs. structure and check how well your heart is working. This test may be needed ifâ¦. â¢ You have a heart murmur. â¢ Youâve had a heart attack. â¢ You have unexplained chest pains. â¢ Youâve had rheumatic fever. â¢ You have a congenital heart defect.