What is cardiac catheterization? Cardiac catheterization (cardiac cath or heart cath) is a procedure to examine how well your heart is working. A thin, hollow tube called a catheter is inserted into a large blood vessel that leads to your heart. View an illustration of cardiac catheterization.
A Troll is a magical creature of prodigious strength and immense stupidity.
patent troll. A company or person that acquires a lot of patents without the desire to actually develop the products. Instead of making money from the product, the company or individual launches a large amount of patent infringement lawsuits. The sole purpose of a patent troll is to identify infringers and sue them.