Cardiac catheterization (angiography): This test, which requires minor sedation, is a method of viewing and assessing
the health of your heart. Through a small incision in your leg or arm,
your doctor inserts a catheter (a long, thin, flexible tube) into the
blood vessel and passes the tube into your heart and surrounding blood
vessels. A dye is injected into the tube to allow your doctor to see your
heart's pumping action and any valve leaks, blockages, or narrowing
of your coronary arteries.