What causes lack of oxygen to the brain (cerebral hypoxia)?

What causes lack of oxygen to the brain (cerebral hypoxia)?

Many things can affect oxygen flow to the brain, including:

• Choking, strangulation or suffocation.
• Drowning.
• Electrocution.
• Head injury, including traumatic brain injuries (TBI).
• Heart attack, arrhythmia and stroke.
• Substance use disorder, including drug overdose and inhalant misuse.
• Carbon monoxide poisoning or smoke inhalation.
• Seizure.
• Severe blood loss or hemorrhage.
• Surgical complications or anesthesia problems.