Cardiac Arrest and Strangling

[Fox McCloud]

I really don't understand why choking someone out doesn't follow the same losebreath rules as being in an airless environment.

You're out in space, and it takes about a full minute for your to finally lose consciousness, but if you quick-choke someone, they black out instantaneously. Now, I know some people can get a pretty damn tight grip, but it's never going to compare to a zero oxygen environment.

Why not just make it so an aggressive grip accumulates losebreath?