The middle-aged man, who has not been named but is from the London area, collapsed with 12 minutes of the game remaining and Wasps leading 24-16.
Rob Wainwright, the Hartlepool No 8 who is a doctor in the army, went into the stand to help revival attempts, along with the club's physiotherapist Nick Matthews and a paramedic. "There was no way the match could go on and I hope the man will make a full recovery," Wainwright said.
A replay is likely as both clubs are in favour. In addition, league rules allow a match abandoned for reasons other than weather to have its result decided by the organising committee, who can also request that the game be replayed.