Some postings have claimed that neurons magically disintegrate shortly after the onset of ischemia.
Significant delays can occur.
Today, the delays involved in cryonic suspensions are largely caused by social and legal factors. Delays following cessation of heart beat of a few minutes will occur even under the most favorable of present conditions. This would obviously eliminate certain classes of damage. Even if the social and legal factors that create delay could be controlled or eliminated, unexpected accidents would still pose a serious risk of significant delay. Thus, it is reasonable to consider the kind of damage caused by such delays.