… to a part of the brain is interrupted or reduced, preventing brain tissue from getting enough oxygen and nutrients. There are two main types of strokes. The most … stroke, hesitations related to calling 911, and explaining the rationale for why getting help is time sensitive. We're trying to meet people where they're at and … to a part of the brain is interrupted or reduced, preventing brain tissue from getting enough oxygen and nutrients. There are two main types of strokes. The most …