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 metal pin for passing through holes in two or more plates or pieces to hold them together, usually made with a head at one end, the other end being hammered into a head after insertion. verb (used with object), riveted, riveting or (especially British) rivetted, rivetting. 2. to fasten with a rivet or rivets.