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.
transitive verb. 1a :  to fish for by trollingb : to fish by trolling in troll lakesc : to pull through the water in trolling troll a lured : to search in or at trolls flea markets for bargains; also : prowl troll nightclubs.