I read that with fast medical attention they can keep you alive until the venom is worked out or something i can't remember.
I have read on a number of sites that if medical attention is significant and immediate, you could make it.
Basically, you'd have to be given immediate and constant CPR and then placed on life support while the venom (similar to venon in a blowfish) dissipated. It takes somewhere around 24 to 48 hours for that to happen. If I remember correctly, I think there are a couple of cases where this happened, and the victims survived.
There are also a number of articles on their popularity as pets in Asia, and the increasing number of deaths of the owners who don't know how deadly they are, then get bitten.
I think all of them should come with the warning : "World's Deadliest Creature, Careful WHEN YOU CLEAN THE TANK!"