Avalanche Victims: When can rewarming lead to survival?

It is difficult for doctors to accurately assess avalanche victims who arrive at hospital suffering cardiac arrest: has the patient effectively suffocated, or is there a realistic prospect of survival if the patient is properly rewarmed? The correct initial assessment is crucial: it ensures that patients with a viable chance of survival are properly rewarmed, while also preventing unnecessary medical intervention in cases where survival is not possible.
Source: EurekaAlert, https://www.eurekalert.org