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

Answer and Explanation

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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Correct Answer is ["A","B","D","E"]

Explanation

A. Elevated erythrocyte sedimentation rate (ESR): Elevated ESR is commonly seen in inflammatory conditions such as pericarditis. ESR measures the rate at which red blood cells settle in a tube of blood over a certain period, and elevated levels indicate inflammation or tissue damage.

B. Increased C-reactive protein (CRP): CRP is an acute-phase reactant produced by the liver in response to inflammation. Elevated CRP levels are indicative of inflammation, making it a useful marker in pericarditis.

C. Elevated thyroid-stimulating hormone (TSH): Elevated TSH levels are not typically associated with pericarditis. TSH is a hormone produced by the pituitary gland that stimulates the thyroid gland to produce thyroid hormones. Elevated TSH levels are seen in conditions such as hypothyroidism.

D. Increased brain natriuretic peptide (BNP): BNP is a hormone produced by the heart in response to increased pressure and volume overload. Pericarditis can lead to increased pressure within the heart, resulting in elevated BNP levels. Therefore, increased BNP levels are anticipated in pericarditis.

E. Increased troponin I: Troponin I is a cardiac biomarker released into the bloodstream when there is damage to cardiac muscle cells. While pericarditis primarily involves inflammation of the pericardium (the sac surrounding the heart), severe cases can lead to myocardial involvement and subsequent release of troponin I. Therefore, increased troponin I levels may be observed in pericarditis, especially if there is myocardial involvement.

A. "l stopped taking aspirin last week." B. "l did not put my contact lenses in this morning." C. "l took my blood pressure meds with a sip of water." D. "l had a cough and runny nose a couple days ago."

Correct Answer is D

Explanation

A. "I stopped taking aspirin last week.": Stopping aspirin medication prior to surgery is often advised to reduce the risk of bleeding during and after the procedure. The nurse may confirm the timing of discontinuation with the client and verify if any other anticoagulant medications are being taken.

B. "I did not put my contact lenses in this morning.": Removing contact lenses before surgery is a routine precaution to prevent potential corneal abrasions or complications during the procedure. This statement indicates the client is following preoperative instructions.

C. "I took my blood pressure meds with a sip of water.": Taking blood pressure medications with a small amount of water is generally acceptable before surgery. However, the nurse may verify the specific medications the client is taking and their dosing schedule to ensure compliance.

D. "I had a cough and runny nose a couple days ago.": This statement requires further investigation as respiratory symptoms, such as cough and runny nose, may indicate an underlying respiratory infection. Infections can increase the risk of complications during surgery, such as anesthesia-related respiratory issues or postoperative infections. The nurse should assess the severity and duration of the symptoms, inquire about any fever or recent exposure to illnesses, and consider notifying the surgical team for further evaluation and decision-making regarding the client's surgical readiness.

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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.)

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