The nurse is teaching a beginning ECG class to staff nurses. As the nurse begins to discuss the parts of the ECG complex, one of the students asks what the normal order of conduction through the heart is. The correct response would be which of the following?
SA node, AV node, bundle of His, right and left bundle branches, and the Purkinje fibers
SA node, AV node, bundle of His, the Purkinje fibers, and the right and left bundle branches
AV node, SA node, bundle of His, right and left bundle branches, and the Purkinje fibers
SA node, AV node, right and left bundle branches, bundle of His, and the Purkinje fibers
The Correct Answer is A
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Hemoglobin is important for evaluating oxygen-carrying capacity but is not directly related to digoxin safety.
B. Blood urea nitrogen (BUN) is useful in assessing renal function but is not the priority for digoxin administration.
C. Creatinine is also important for renal function assessment, especially since digoxin is renally excreted, but it is still secondary to potassium.
D. Potassium is the priority lab value to review before giving digoxin, because hypokalemia increases the risk of digoxin toxicity, which can lead to serious arrhythmias. Monitoring and correcting potassium levels is essential for client safety.
Correct Answer is C
Explanation
A. A client showing signs of shock (e.g., cold, clammy skin, decreased bowel sounds, tachycardia) is not likely to stabilize and be released by the next day without intensive treatment.
B. The irreversible stage of shock is marked by profound hypotension, multi-organ failure, and unresponsiveness—more severe than this client’s current status.
C. The progressive stage of shock is characterized by impaired tissue perfusion, cold and clammy skin, tachycardia, hypoactive bowel sounds, and early signs of organ dysfunction. Even though the blood pressure is currently normal, perfusion is inadequate.
D. The compensatory stage is earlier and includes signs like tachycardia and restlessness, but perfusion to vital organs is still maintained, and skin may remain warm. This client’s cold skin and decreased bowel sounds suggest progression beyond this stage.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.