A group of nurses is reviewing several electrocardiograms (ECGs). The students demonstrate an understanding of the waveforms when they identify which component as indicating ventricular repolarization (relaxation).
ST segment
QRS complex
T wave
P wave
The Correct Answer is C
A. ST segment: Represents the period between ventricular depolarization and repolarization.
B. QRS complex: Represents ventricular depolarization.
C. T wave: Indicates ventricular repolarization, or relaxation, after the QRS complex.
D. P wave: Represents atrial depolarization.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. A flat murmur does not accurately describe the type of murmur associated with mitral insufficiency.
B. Mitral insufficiency is typically classified as a systolic murmur, not diastolic.
C. An absent murmur would indicate no audible sound, which is not applicable here.
D. Mitral insufficiency or regurgitation is characterized by a systolic murmur due to the backflow of blood from the left ventricle into the left atrium during systole.
Correct Answer is B
Explanation
A. Diverticulosis: Murphy's sign is not used to diagnose diverticulosis.
B. Acute Cholecystitis: Murphy's sign is a clinical test used to identify acute cholecystitis. It is positive when the patient experiences pain upon palpation of the gallbladder area during inhalation.
C. Appendicitis: Murphy's sign is not associated with appendicitis; instead, other signs such as McBurney’s point tenderness are used.
D. Nephrolithiasis: Murphy's sign is not indicative of nephrolithiasis; kidney stones are assessed through other signs and symptoms.
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