Which of the following individuals would be most likely to experience global ischemia to his or her brain?

Which of the following individuals would be most likely to experience global ischemia to his or her brain? (Points : 0.4)
A male patient who has just had an ischemic stroke confirmed by CT of his head
A woman who has been admitted to the emergency department with a suspected intracranial bleed
A man who has entered cardiogenic shock following a severe myocardial infarction
A woman who is being brought to the hospital by ambulance following suspected carbon monoxide poisoning related to a faulty portable heater