Which clinical manifestations would the nurse expect to find during their assessment of a patient with right heart failure (RHF)?
Enlarged liver and peripheral edema.
Crackles in the lungs.
Dry hacking cough.
Altered mentation with pinpoint pupils.
The Correct Answer is A
Choice A rationale
Enlarged liver (hepatomegaly) and peripheral edema are common clinical manifestations of right heart failure (RHF). RHF leads to congestion of systemic circulation, causing fluid accumulation in the liver and peripheral tissues.
Choice B rationale
Crackles in the lungs are more commonly associated with left-sided heart failure, where fluid backs up into the pulmonary circulation, leading to pulmonary edema.
Choice C rationale
A dry hacking cough is not a typical symptom of right heart failure. It is more commonly associated with respiratory conditions such as asthma or bronchitis.
Choice D rationale
Altered mentation with pinpoint pupils is not a characteristic of right heart failure. These symptoms are more indicative of neurological conditions or opioid overdose.
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Correct Answer is A
Explanation
Choice A rationale
Elevated blood ammonia levels are a common consequence of liver dysfunction, particularly in conditions like cirrhosis and alcoholic liver disease. The liver is responsible for converting ammonia, a byproduct of protein metabolism, into urea, which is then excreted by the kidneys. When the liver is damaged, it cannot effectively perform this function, leading to elevated blood ammonia levels. High ammonia levels can cross the blood-brain barrier and cause hepatic encephalopathy, which manifests as confusion, memory loss, and asterixis (a flapping tremor of the hands). These neurological symptoms are consistent with the patient’s presentation.
Choice B rationale
An increased white blood cell count typically indicates an infection or inflammation. While infections can occur in patients with liver disease due to a compromised immune system, the symptoms described (increased blood glucose, blurred vision, memory loss, and asterixis) are more indicative of hepatic encephalopathy rather than an infection.
Choice C rationale
Elevated blood urea nitrogen (BUN) levels can occur in liver disease, but they are more commonly associated with kidney dysfunction. BUN is a measure of the amount of nitrogen in the blood that comes from the waste product urea. While liver dysfunction can affect BUN levels, the symptoms described are more specifically related to elevated ammonia levels and hepatic encephalopathy.
Choice D rationale
A decreased platelet count, or thrombocytopenia, is a common finding in liver disease due to splenic sequestration and decreased production of thrombopoietin. However, thrombocytopenia does not directly cause the neurological symptoms described in the patient. The symptoms of increased blood glucose, blurred vision, memory loss, and asterixis are more specifically related to elevated ammonia levels and hepatic encephalopathy.
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.