It's performed to correct single ventricle birth defect. The normal heart has fours chamber - two upper atria and two lower ventricles. With single ventricle there is either a comlpete absence of a second ventricle or it is underdeveloped. Cauterization creates a second ventricle or enlarges a poorly developed one. Source(s): I'm a nurse.
Trivet definition, a small metal plate with short legs, especially one put under a hot platter or dish to protect a table. See more.
: a special kind of metal bolt or pin that is used to hold pieces of metal together. : a headed pin or bolt of metal used for uniting two or more pieces by passing the shank through a hole in each piece and then beating or pressing down the plain end so as to make a second head.ull Definition of RIVET. transitive verb. 1. : to fasten with or as if with rivets. 2. : to upset the end or point of (as a metallic pin, rod, or bolt) by beating or pressing so as to form a head. 3. 4.