Final answer:
Cardiac arrest, hypertension, and stroke can all be causes of global cerebral ischemia. The correct option is C) Cardiac Arrest.
Step-by-step explanation:
Global cerebral ischemia can be caused by several conditions, but one of the main causes is cardiac arrest. During cardiac arrest, the heart stops pumping blood to the brain, resulting in a lack of oxygen and nutrients reaching the brain cells. This can lead to widespread brain damage and global cerebral ischemia.
Other conditions that can cause global cerebral ischemia include hypertension (high blood pressure) and stroke. In a stroke, there is a disruption of blood flow to the brain, which can occur due to a blood clot blocking an artery supplying the brain.
Global cerebral ischemia refers to a widespread reduction in blood flow to the entire brain. Cardiac arrest, the sudden cessation of the heart's pumping action, can lead to a sudden and severe reduction or interruption of blood flow to the brain. This lack of blood flow deprives the brain of oxygen and nutrients, resulting in potential damage to brain tissues.
While other conditions listed (stroke, hypertension, migraine) can impact cerebral blood flow, cardiac arrest is a more direct and immediate cause of global cerebral ischemia due to the complete stoppage of blood circulation.
The correct option is C) Cardiac Arrest.