GA on Aaatrox didnt work (which is especially ironic on a champion like aatrox). I think kennen killed me with his ult. Kennen had morello. according to wiki, morello applies grievious wounds, and grievious wounds prevent healing, which i first thought was the reason i died, but then i read the description of GA too, and it specifically says that GA clears grievious wounds, so that cannot be it.
theres also a brand with rapid fire cannon who attacked me in that exact moment... but i dont think RFC should be able to kill someone who is in GA revive mode