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 A
Explanation
A. Palpating McBurney's point for rebound tenderness helps evaluate for appendicitis, which is relevant given the client’s localized tenderness in the right lower quadrant.
B. Murphy's sign is used to assess for gallbladder inflammation, which is not indicated by right lower quadrant pain.
C. The Tinel sign is used to assess for nerve irritation, not abdominal pain or appendicitis.
D. Testing for a fluid wave is used to assess for ascites, which does not fit the presentation of localized right lower quadrant pain.
Correct Answer is B
Explanation
A. Venous insufficiency ulcers: Typically present with dark discoloration and edema, but not specifically with changes in color with elevation and dependency.
B. Arterial insufficiency ulcers: Pale feet when elevated and dark red when dependent are classic signs of arterial insufficiency. These changes in color are due to poor blood flow.
C. Neuropathic ulcers: Usually associated with diabetes and often occur on pressure points, not typically related to color changes with elevation.
D. Deep vein thrombosis: While DVT can cause swelling and pain, it does not usually present with color changes that are dependent on the position of the foot.
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