The episode was caused by a genetic heart issue and Paul is expected to make a full recovery."
It is not yet entirely clear what the 'cardiac event' is.
He has not fought in an officially sanctioned match in nearly two years - although he did scrap with Randy Orton on an episode of RAW in January.
Triple H, one of WWE's greatest superstars, is married to Stephanie McMahon, the Chief Brand Officer and daughter of owner Vince McMahon.
The couple have three daughters, Vaughan, Aurora and Murphy.