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.
Full 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. : to attract and hold (as the attention) completely. â rivÂ·etÂ·er noun.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.