A nurse is reviewing the medical history of a client who has ischemic stroke. Which of the following conditions is the most common cause of ischemic stroke?

Choice A reason:

This is a correct answer, as the medication increases dopamine levels in the brain, which helps to improve the symptoms of Parkinson's disease, such as tremors, rigidity, and bradykinesia.

Choice B reason:

This is an incorrect answer, as the medication does not decrease acetylcholine levels in the brain, but rather increases dopamine levels. Acetylcholine is another neurotransmitter that controls muscle contraction, learning, and memory.

Choice C reason:

This is an incorrect answer, as the medication does not increase serotonin levels in the brain, but rather increases dopamine levels. Serotonin is another neurotransmitter that controls mood, sleep, and appetite.

Choice D reason:

This is an incorrect answer, as the medication does not decrease glutamate levels in the brain, but rather increases dopamine levels. Glutamate is another neurotransmitter that controls excitatory signals in the brain.

Choice A reason:

This is the correct answer because atherosclerosis is the main cause of ischemic stroke, as it leads to the formation of plaques that narrow the cerebral arteries and reduce blood flow to the brain.

Choice B reason:

This is incorrect because atrial fibrillation is a risk factor for ischemic stroke, but not the most common cause. Atrial fibrillation can cause embolic stroke, which occurs when a blood clot from the heart travels to the brain and blocks a cerebral artery.

Choice C reason:

This is incorrect because cerebral aneurysm is a cause of hemorrhagic stroke, not ischemic stroke. Cerebral aneurysm is a weak spot in a cerebral artery that can rupture and bleed into the brain.

Choice D reason:

This is incorrect because arteriovenous malformation is also a cause of hemorrhagic stroke, not ischemic stroke. Arteriovenous malformation is a congenital abnormality of the blood vessels in the brain that can leak or burst and cause bleeding.