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.
See also. 1  Astroturfing. 2  Catfishing. 3  On the Internet, nobody knows you're a dog. 4  Online reputation. 5  Passing (sociology) 6  Shill. 7  Conflict-of-interest editing on Wikipedia. 8  Troll.