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a. Sinus Rhythm with Premature Ventricular Contractions (PVCs)
• Description: The baseline rhythm appears relatively regular, but it's interrupted by
wide, bizarre QRS complexes that occur earlier than expected (the PVCs). In this
example, they appear as isolated beats.

b. Atrial Fibrillation (AFib) or A-Fib
• Description: This rhythm is characterized by a completely irregularly irregular
ventricular rhythm (R-R intervals) and the absence of distinct P waves. Instead, the
baseline shows chaotic, fine, undulating activity (fibrillatory waves).

c. Ventricular Tachycardia (VT) or V-Tach
• Description: This is a fast, regular rhythm originating from the ventricles. It's defined
by a sequence of three or more consecutive wide QRS complexes (usually \ge 0.12
seconds) at a rate typically exceeding 100 beats per minute. The QRS complexes are
often uniform in appearance (monomorphic VT).

d. Sinus Rhythm with First-Degree Atrioventricular (AV) Block
• Description: The rhythm is regular with a normal heart rate, and every P wave is
followed by a QRS complex. However, the PR interval (the time from the start of the P
wave to the start of the QRS complex) is prolonged (longer than 0.20 seconds or one
large box), indicating a delay in conduction through the AV node.

e. Asystole
• Description: This is often called "flatline." The tracing shows a nearly straight line,
indicating the absence of electrical activity in the heart.

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Question 54
A patient is admitted with liver and gallbladder disease. On assessment, where should the nurse focus palpation for tenderness?
A. Left upper quadrant
B. Right upper quadrant
C. Left lower quadrant
D. Right lower quadrant
Correct Answer: B. Right upper quadrant

Question 55
A nurse is assisting a patient who is unsteady while walking. Which of the following devices is most appropriate to ensure safety?
A. Gait belt
B. Cane
C. Walker without supervision
D. Wheelchair only
Correct Answer: A. Gait belt

Question 56
A child has undergone surgery for hypospadias. Which of the following instructions should the nurse teach the mother regarding postoperative care?
A. Allow the child to swim immediately
B. Let the child play with certain toys that require straddling
C. Change the child’s diaper frequently with standard diapers
D. Use a double diaper to protect the surgical site
Correct Answer: D. Use a double diaper to protect the surgical site