"On my travels, I've seen the Quarter Turn to Left (called a Heel Pivot) danced preceded by a Quick Open Reverse Turn."
The heel pivot is a usefull figure, but it has been relegated to the appendix by some revisionist at the ISTD. An option more in their current favor would be the QOR followed by the reverse (ball) pivot. At any rate, it's usefull to understand the difference between the two actions.