As a medical professional, I can tell you that the
brain is extremely sensitive to oxygen deprivation. It can typically survive for
about six minutes without blood flow. This is the critical time frame within which
cardiopulmonary resuscitation (CPR) should be initiated if cardiac arrest occurs. Starting CPR within
six minutes can help preserve
brain function by maintaining some oxygen supply. However, after
about six minutes without proper oxygenation, irreversible
brain damage can occur.
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