According to Cedars-Sinai Medical Center, people who don't receive proper medical treatment after suffering a subarachnoid hemorrhage have a 20% to 30% chance of experiencing a second bleed within the first month -- and the odds of surviving a second bleed are extremely slim.
Cedars states, "Recurrent bleeding has a 70% mortality rate."
Fortunately, Michaels is reportedly being treated in a capable medical center.
However, it appears as though Michaels is already beating the odds -- Cedars reports that roughly 1/3 of people who have a subarachnoid hemorrhage die during the hemorrhage because of extensive brain damage. Obviously, Michaels has already cleared that hurdle.
As for Michaels' treatment, Cedars warns, "Because of the ominous prognosis with delayed definitive therapy, referral to a center of excellence with experience in treating subarachnoid hemorrhage is imperative."