A patient with cerebral ischemia has signs and symptoms of right homonymous hemianopia and inability to move the right arm.
This is indicative of increased intracranial pressure that is most probably due to a lesion in the:
Left extrapyramidal tract.
Right cerebral hemisphere.
Cerebellum.
Left cerebral hemisphere.
The Correct Answer is D
Choice A rationale
The left extrapyramidal tract is involved in motor control, but lesions here would not cause right homonymous hemianopia or inability to move the right arm. These symptoms are more indicative of a lesion in the cerebral hemisphere.
Choice B rationale
A lesion in the right cerebral hemisphere would cause left-sided symptoms, not right-sided. The patient’s symptoms are indicative of a lesion in the left cerebral hemisphere.
Choice C rationale
The cerebellum is involved in coordination and balance, not in causing right homonymous hemianopia or inability to move the right arm. These symptoms are more indicative of a lesion in the cerebral hemisphere.
Choice D rationale
A lesion in the left cerebral hemisphere can cause right homonymous hemianopia and inability to move the right arm. This is because the left hemisphere controls the right side of the body and processes visual information from the right visual field.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale
Autonomic neuropathy is a common complication of diabetes and can affect various autonomic functions, including heart rate, blood pressure, and digestion. It is caused by damage to the autonomic nerves due to prolonged high blood sugar levels.
Choice B rationale
Diabetic-induced leukocyte depletion is not a recognized complication of diabetes. Diabetes primarily affects blood vessels and nerves rather than causing leukocyte depletion.
Choice C rationale
Diabetic-induced angiopathy refers to damage to blood vessels caused by diabetes. While it is a recognized complication, autonomic neuropathy is more directly related to diabetic-induced complications.
Choice D rationale
Overdrive of the RAAS (renin-angiotensin-aldosterone system) is not a specific complication of diabetes. While diabetes can affect the RAAS, it is not the most likely condition related to diabetic-induced complications.
Correct Answer is A
Explanation
Choice A rationale
Cerebral ischemia due to an embolus that originates in the left atrium is a common complication of chronic atrial fibrillation (AFib). AFib causes irregular and chaotic electrical signals in the atria, leading to poor blood flow and the formation of blood clots. These clots can travel to the brain, causing a stroke. This is the most acute and severe event associated with chronic AFib.
Choice B rationale
Development of ventricular fibrillation is a life-threatening arrhythmia that can occur in patients with severe heart disease, but it is not a common acute event in chronic AFib.
Ventricular fibrillation involves the ventricles and is characterized by rapid, erratic electrical impulses, leading to ineffective heart contractions and sudden cardiac arrest.
Choice C rationale
Ischemia of the cerebellum due to a ruptured intracranial aneurysm is not directly related to chronic AFib. While AFib increases the risk of stroke, it does not specifically cause aneurysms or cerebellar ischemia. Aneurysms are typically related to other risk factors such as hypertension and vascular abnormalities.
Choice D rationale
Prolonged capillary refill secondary to a complete lack of cardiac output is a sign of severe cardiac dysfunction or shock. While AFib can lead to heart failure and reduced cardiac output, it does not typically cause a complete lack of cardiac output. The most acute event related to AFib is the formation of emboli and subsequent stroke.
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