SCRN Anatomy, Physiology, and Pathophysiology of Stroke

Question 1

What is a stroke?

Accepted Answer

A disruption of blood supply to the brain

Answer

A stroke, also known as a cerebrovascular accident (CVA), occurs when the blood flow to a part of the brain is interrupted or severely reduced. This deprives brain tissue of oxygen and nutrients, causing brain cells to die within minutes. This disruption can be due to a blocked artery (ischemic stroke) or a ruptured blood vessel (hemorrhagic stroke).

Question 2

What is ischemic stroke?

Accepted Answer

A stroke due to reduced blood flow caused by a clot

Answer

Ischemic stroke is the most common type of stroke, occurring when a blood clot blocks or narrows an artery that supplies blood to the brain. This blockage prevents oxygen and nutrients from reaching brain cells, leading to their damage or death. The clot can form in the brain's arteries (thrombotic) or travel from elsewhere in the body (embolic).

Question 3

What is hemorrhagic stroke?

Accepted Answer

A stroke caused by bleeding in the brain

Answer

A hemorrhagic stroke occurs when a blood vessel in the brain ruptures and bleeds into the surrounding brain tissue. This bleeding directly damages brain cells and increases pressure on the brain, further impairing function. It is often associated with high blood pressure, aneurysms, or arteriovenous malformations (AVMs).

Question 4

Which part of the brain is most commonly affected by a stroke?

Accepted Answer

The brainstem

Answer

The brainstem is a crucial part of the brain that connects the cerebrum with the spinal cord and controls many vital functions, including breathing, heart rate, and consciousness. A stroke affecting the brainstem can have severe and life-threatening consequences due to its role in these essential bodily processes. While other areas are also affected, the brainstem's role is critical.

Question 5

What are the main causes of ischemic stroke?

Accepted Answer

Fatty deposits and blood clots

Answer

The primary causes of ischemic stroke are atherosclerosis, which involves the buildup of fatty deposits (plaque) in the arteries, and the formation of blood clots. These plaques can narrow arteries, reducing blood flow, or rupture, leading to clot formation that blocks the vessel. Clots can also travel from other parts of the body, such as the heart, to the brain.

(SCRN) Stroke Certified Registered Nurse Practice Test

(SCRN) Stroke Certified Registered Nurse Practice Test

SCRN Anatomy, Physiology, and Pathophysiology of Stroke