The nurse asks a client who is about to have a cardiac catheterization about any allergies. The client states, "I always get a rash when I eat shellfish." Which of the following is the priority nursing action?

Ask the client if any other foods cause such a reaction.

Notify the provider of the client's allergy.

Notify the dietary department of the client's allergy.

Atach a wrist band indicating the client's allergy.

Answer and Explanation

The Correct Answer is B

The priority nursing action is to notify the provider of the client's allergy because shellfish allergy may indicate an allergy to iodine, which is commonly used as a contrast dye in cardiac catheterization. This could cause a severe allergic reaction or anaphylaxis during the procedure, which could be life-threatening. The provider may need to order a diﬀerent type of contrast dye or premedicate the client with antihistamines or steroids to prevent an allergic reaction.

a. Ask the client if any other foods cause such a reaction is wrong because it is not the priority action and it does not address the potential risk of iodine allergy.

c. Notify the dietary department of the client's allergy is wrong because it is not relevant to the cardiac catheterization and it does not prevent an allergic reaction during the procedure.

d. Atach a wrist band indicating the client's allergy is wrong because it is not sufficient to alert the provider or the catheterization team of the client's allergy and it does not prevent an allergic reaction during the procedure.

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Correct Answer is A

Explanation

The nurse should explain that cardiac enzyme studies measure the levels of certain enzymes, such as troponin, creatine kinase, and lactate dehydrogenase, that are released into the bloodstream when the heart muscle is damaged by an MI. These tests help determine the degree of damage to the heart tissues, as well as the timing and severity of the MI.

"These tests will enable the provider to determine the heart structure and mobility of the heart valves." is wrong because cardiac enzyme studies do not provide information about the heart structure and mobility of the heart valves. Other tests, such as echocardiography or cardiac catheterization, may be used for this purpose.

"Cardiac enzymes will identify the location of the MI." is wrong because cardiac enzyme studies do not indicate the specific location of the MI within the heart. Other tests, such as electrocardiography or coronary angiography, may be used for this purpose.

"Cardiac enzymes assist in diagnosing the presence of pulmonary congestion." is wrong because cardiac enzyme studies do not directly assess the presence of pulmonary congestion, which is a complication of heart failure. Other signs and symptoms, such as dyspnea, crackles, and chest x-ray findings, may be used for this purpose.

A. Slow repolarization of ventricular Purkinje fibers B. Atrial depolarization C. Early ventricular repolarization D. Ventricular depolarization

Correct Answer is B

Explanation

The P wave is the first wave on the ECG strip and represents the electrical activity of the atria. It reﬂects the depolarization of the atrial myocardium, which is the process of changing the electrical charge of the cardiac cells from negative to positive, triggering a contraction. The P wave precedes the QRS complex, which represents ventricular depolarization, and the T wave, which represents ventricular repolarization.

The other options are not correct because:

a. Slow repolarization of ventricular Purkinje fibers. This statement is incorrect because it describes the U wave, which is a small and sometimes invisible wave that follows the T wave on the ECG strip. It reﬂects the repolarization of the ventricular Purkinje fibers, which are specialized cardiac cells that conduct electrical impulses to the ventricles. The U wave is more prominent in conditions that cause hypokalemia, such as diuretic use or vomiting.

c. Early ventricular repolarization. This statement is incorrect because it describes the ST segment, which is the ﬂat line between the QRS complex and the T wave on the ECG strip. It reﬂects the early phase of ventricular repolarization, which is the process of restoring the electrical charge of the cardiac cells to negative after a contraction. The ST segment can be elevated or depressed in conditions that cause myocardial ischemia or injury, such as angina or myocardial infarction.

d. Ventricular depolarization. This statement is incorrect because it describes the QRS complex, which is the largest and most visible wave on the ECG strip. It reﬂects the depolarization of the ventricular myocardium, which triggers a ventricular contraction. The QRS complex follows the P wave and precedes the T wave on the ECG strip.

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The nurse asks a client who is about to have a cardiac catheterization about any allergies. The client states, "I always get a rash when I eat shellfish." Which of the following is the priority nursing action?

Nursing Test Bank

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Explanation

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