A nurse is providing care for a client following a cardiac arrest due to pulseless electrical activity (PEA). Which of the following alterations are causes of PEA? (Select All that Apply.)
Hypertension
Hypovolemia
Hypoxia
Hyperkalemia
Hypernatremia
Hyperthermia
Correct Answer : B,C,D
Pulseless electrical activity (PEA) refers to a situation in which an electrocardiogram (ECG) shows electrical activity in the heart, but there is no effective mechanical activity and no palpable pulse. PEA can result from various underlying conditions that impair cardiac function or compromise circulation.
A. Hypertension: Hypertension, or high blood pressure, is not typically a direct cause of PEA. While uncontrolled hypertension can contribute to cardiovascular disease and increase the risk of cardiac events such as myocardial infarction, it is not a direct cause of PEA.
B. Hypovolemia: Hypovolemia, or low blood volume, is a common cause of PEA. Reduced circulating blood volume leads to decreased preload and inadequate filling of the heart chambers, impairing cardiac output. This can result in ineffective cardiac contractions and the development of PEA.
C. Hypoxia: Hypoxia, or inadequate oxygenation of tissues, is a significant cause of PEA. Insufficient oxygen delivery to the myocardium impairs cardiac function and can lead to ineffective cardiac contractions. Without adequate oxygenation, the heart is unable to generate sufficient mechanical force to maintain circulation, resulting in PEA.
D. Hyperkalemia: Hyperkalemia, or elevated levels of potassium in the blood, can cause PEA by disrupting cardiac electrical activity. Excessive potassium ions in the extracellular fluid alter the normal myocardial action potential, leading to cardiac conduction abnormalities and potential arrhythmias, including PEA.
E. Hypernatremia: Hypernatremia, or elevated levels of sodium in the blood, is not typically a direct cause of PEA. While severe hypernatremia can lead to neurological symptoms and dehydration, it does not directly impair cardiac electrical activity or mechanical function to the extent that it causes PEA.
F. Hyperthermia: Hyperthermia, or elevated body temperature, is not typically a direct cause of PEA. While extreme hyperthermia can lead to cardiovascular complications such as heat stroke, it is not a common cause of PEA unless it is associated with severe systemic metabolic derangements.
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Related Questions
Correct Answer is B
Explanation
A. Poor functional ability: While poor functional ability may impact the overall prognosis and quality of life for a client with a subarachnoid hemorrhage (SAH), it is not directly associated with a high mortality rate. Functional ability can be improved with rehabilitation and supportive care.
B. Rebleeding of the injury: Rebleeding of the SAH is a significant risk factor associated with a high mortality rate. Rebleeding can lead to increased intracranial pressure, worsening neurological deficits, and even death. Preventing rebleeding is a critical aspect of managing SAH to improve outcomes.
C. Decreased cerebrospinal fluid: Decreased cerebrospinal fluid (CSF) may indicate conditions such as hydrocephalus, which can complicate the management of SAH. However, it is not directly associated with a high mortality rate compared to rebleeding.
D. Use of nimodipine: Nimodipine is a calcium channel blocker commonly used in the management of SAH to prevent cerebral vasospasm, which can lead to ischemia and worsen outcomes. While nimodipine plays a role in improving outcomes by preventing vasospasm, its use is not directly associated with mortality rates.
Correct Answer is ["B","C","E"]
Explanation
A. Varicose veins: Varicose veins are dilated, twisted veins that commonly occur in the legs and are typically associated with venous insufficiency or venous valve dysfunction rather than valvular dysfunction of the heart.
B. Heart murmur: This is the correct answer. Valvular dysfunction can result in abnormal blood flow patterns across the heart valves, leading to turbulent blood flow and the production of audible heart murmurs upon auscultation.
C. Palpitations: Palpitations, or the sensation of rapid, pounding, or irregular heartbeats, can occur with valvular dysfunction, particularly if the dysfunction leads to alterations in heart rhythm or cardiac output.
D. Abdominal pain: Abdominal pain is not typically associated with valvular dysfunction. It may be a symptom of various gastrointestinal or abdominal conditions, but it is not a direct manifestation of valvular heart disease.
E. Chest pain: This is the correct answer. Chest pain can occur with valvular dysfunction, especially if the dysfunction leads to inadequate blood flow to the heart muscle (ischemia), which can cause angina or chest discomfort.
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