It is almost always going to be 45 degrees, but there are other criteria that could be met. Keep in mind, the "45 degrees' rule only comes into play when one shoulder or scapula is on the mat.
I can't find my NCAA rulebook PDF, this is from an NCAA publication though:
A near fall is when an offensive wrestler turns his opponent past 45 degrees for a period of time. This can occur in a bridged position as well, on both elbows or when a wrestler has his back within four inches of the mat.
So, "both elbows" can come into play off of a double, a suckback, or a headlock, etc.
I usually see "four inches off of a suckback, but I suppose it could be a tilt. (Yianni was careful not to bridge when Murin was tilting)