Which acute event is most likely to occur in a patient who has chronic atrial fibrillation?
Cerebral ischemia due to an embolus that originates in the left atrium.
Development of ventricular fibrillation.
Ischemia of the cerebellum due to a ruptured intracranial aneurysm.
Prolonged capillary refill secondary to a complete lack of cardiac output.
The Correct Answer is A
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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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale
Hypocortisolism, also known as Addison’s disease, is characterized by insufficient production of cortisol by the adrenal glands. It does not typically cause goiter, which is an enlargement of the thyroid gland due to various causes such as iodine deficiency, autoimmune diseases, or nodules.
Choice B rationale
Hyperinsulinemia refers to an excess level of insulin in the blood, often associated with insulin resistance and type 2 diabetes. It is not related to the development of goiter.
Choice C rationale
Iodide deficiency is a common cause of goiter. The thyroid gland requires iodine to produce thyroid hormones. When there is a deficiency, the gland enlarges in an attempt to capture more iodine from the bloodstream.
Choice D rationale
Azotemia is an elevation of blood urea nitrogen (BUN) and serum creatinine levels, typically due to kidney dysfunction. It is not associated with the development of goiter.
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.
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