A nurse is caring for a client who is has developed anaphylactic shock in response to the ingestion of strawberries. Which of the following medications should the nurse administer first?

Epinephrine

Dobutamine

Methylprednisolone

Furosemide

Answer and Explanation

The Correct Answer is A

A. Epinephrine – Epinephrine is the first-line treatment for anaphylactic shock. It rapidly reverses airway constriction, hypotension, and swelling by stimulating alpha and beta-adrenergic receptors, leading to bronchodilation, vasoconstriction, and increased cardiac output.
B. Dobutamine – Dobutamine is a positive inotrope used to treat cardiogenic shock and may support cardiac output, but it does not address the airway or allergic component of anaphylaxis.
C. Methylprednisolone – This corticosteroid may be given to reduce inflammation and prevent delayed reactions, but it has a slower onset of action and is not the priority in emergency management.
D. Furosemide – This diuretic is used in fluid overload or pulmonary edema, not in the management of anaphylaxis.

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Correct Answer is A

Explanation

A. This is the correct sequence of normal electrical conduction through the heart: the impulse originates in the sinoatrial (SA) node, travels to the atrioventricular (AV) node, then to the bundle of His, down the right and left bundle branches, and finally through the Purkinje fibers.
B. This choice places the Purkinje fibers before the bundle branches, which is incorrect.
C. The AV node does not initiate conduction; the SA node is the natural pacemaker of the heart.
D. This sequence incorrectly places the bundle branches before the bundle of His.

A. Atrial rhythm regular, ventricular rhythm irregular B. P:QRS ratio of 1:1 C. P:QRS ratio of 2:1 D. Ventricular and atrial rhythm are irregular

Correct Answer is B

Explanation

A. An atrial rhythm regular and ventricular rhythm irregular would suggest an arrhythmia such as atrial fibrillation or flutter with variable conduction—not sinus tachycardia.
B. In sinus tachycardia, the rhythm is regular, the P:QRS ratio is 1:1, meaning each P wave is followed by a QRS complex, and the origin is from the sinus node.
C. A 2:1 P:QRS ratio is characteristic of certain types of heart block or atrial flutter—not sinus tachycardia.
D. Irregular ventricular and atrial rhythms are seen in atrial fibrillation or other irregular arrhythmias, not sinus tachycardia.

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A nurse is caring for a client who is has developed anaphylactic shock in response to the ingestion of strawberries. Which of the following medications should the nurse administer first?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

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Correct Answer is A

Explanation

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Correct Answer is B

Explanation

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