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.
Stone-trolls were trolls who turned into stone during daylight, like the trolls in The Hobbit. They could speak, and used a debased form of Westron (presumably rendered into Cockney English in Tolkien's translation of Bilbo's diary).