ECG Workout
Exercises in Arrhythmia Interpretation
8th Edition
Author(s)Jane Huff
,TEST BANK
Table of Contents — ECG Workout: Exercises in Arrhythmia Interpretation, 8th Edition
1. Anatomy and Physiology of the Heart
2. Electrophysiology
3. Waveforms, Complexes, Intervals, and Segments
4. Cardiac Monitors
5. Analyzing a Rhythm Strip
6. Sinus Rhythms
7. Atrial Rhythms
8. Junctional Rhythms and AV Blocks
9. Ventricular Rhythms and Bundle-Branch Block
10. Pacemakers
11. Posttes
Question 1
A patient’s ECG shows a regular rhythm at 72 bpm with upright
P waves preceding each QRS complex. The nurse understands
that the P wave represents which mechanical event related to
cardiac anatomy?
A. Ventricular contraction through the semilunar valves
B. Atrial depolarization causing atrial contraction
C. Closure of the mitral and tricuspid valves
D. Ventricular repolarization
Correct Answer: B
,Rationale:
The P wave represents atrial depolarization, which leads to
atrial contraction and movement of blood from the atria into
the ventricles. This corresponds with normal conduction
through the atria.
• A is incorrect: ventricular contraction is associated with
the QRS complex.
• C is incorrect: valve closure is mechanical, not directly
shown as a waveform.
• D is incorrect: ventricular repolarization is the T wave.
Source: ECG Workout: Exercises in Arrhythmia Interpretation,
8th Edition – Chapter 1
Question 2
An ECG rhythm shows a normal PR interval and narrow QRS
complexes. The nurse correlates this with normal conduction
through which structure responsible for delaying impulses?
A. Bundle of His
B. Atrioventricular (AV) node
C. Purkinje fibers
D. Sinoatrial (SA) node
Correct Answer: B
Rationale:
The AV node delays the electrical impulse, allowing time for
, ventricular filling before ventricular contraction. This delay is
reflected in the PR interval.
• A and C conduct impulses rapidly, not delay them.
• D initiates the impulse but does not delay it.
Source: ECG Workout: Exercises in Arrhythmia Interpretation,
8th Edition – Chapter 1
Question 3
A patient’s ECG shows a regular rhythm with normal P waves
and QRS complexes. The nurse understands that effective
cardiac output depends on proper blood flow through which
sequence?
A. Ventricles → atria → lungs → body
B. Atria → ventricles → lungs/body
C. Lungs → ventricles → atria
D. Ventricles → lungs → atria
Correct Answer: B
Rationale:
Blood flows from atria to ventricles, then to lungs (right side) or
body (left side). This coordinated sequence is reflected in
normal ECG conduction.
• Other options incorrectly sequence cardiac flow.
Source: ECG Workout: Exercises in Arrhythmia Interpretation,
8th Edition – Chapter 1
Exercises in Arrhythmia Interpretation
8th Edition
Author(s)Jane Huff
,TEST BANK
Table of Contents — ECG Workout: Exercises in Arrhythmia Interpretation, 8th Edition
1. Anatomy and Physiology of the Heart
2. Electrophysiology
3. Waveforms, Complexes, Intervals, and Segments
4. Cardiac Monitors
5. Analyzing a Rhythm Strip
6. Sinus Rhythms
7. Atrial Rhythms
8. Junctional Rhythms and AV Blocks
9. Ventricular Rhythms and Bundle-Branch Block
10. Pacemakers
11. Posttes
Question 1
A patient’s ECG shows a regular rhythm at 72 bpm with upright
P waves preceding each QRS complex. The nurse understands
that the P wave represents which mechanical event related to
cardiac anatomy?
A. Ventricular contraction through the semilunar valves
B. Atrial depolarization causing atrial contraction
C. Closure of the mitral and tricuspid valves
D. Ventricular repolarization
Correct Answer: B
,Rationale:
The P wave represents atrial depolarization, which leads to
atrial contraction and movement of blood from the atria into
the ventricles. This corresponds with normal conduction
through the atria.
• A is incorrect: ventricular contraction is associated with
the QRS complex.
• C is incorrect: valve closure is mechanical, not directly
shown as a waveform.
• D is incorrect: ventricular repolarization is the T wave.
Source: ECG Workout: Exercises in Arrhythmia Interpretation,
8th Edition – Chapter 1
Question 2
An ECG rhythm shows a normal PR interval and narrow QRS
complexes. The nurse correlates this with normal conduction
through which structure responsible for delaying impulses?
A. Bundle of His
B. Atrioventricular (AV) node
C. Purkinje fibers
D. Sinoatrial (SA) node
Correct Answer: B
Rationale:
The AV node delays the electrical impulse, allowing time for
, ventricular filling before ventricular contraction. This delay is
reflected in the PR interval.
• A and C conduct impulses rapidly, not delay them.
• D initiates the impulse but does not delay it.
Source: ECG Workout: Exercises in Arrhythmia Interpretation,
8th Edition – Chapter 1
Question 3
A patient’s ECG shows a regular rhythm with normal P waves
and QRS complexes. The nurse understands that effective
cardiac output depends on proper blood flow through which
sequence?
A. Ventricles → atria → lungs → body
B. Atria → ventricles → lungs/body
C. Lungs → ventricles → atria
D. Ventricles → lungs → atria
Correct Answer: B
Rationale:
Blood flows from atria to ventricles, then to lungs (right side) or
body (left side). This coordinated sequence is reflected in
normal ECG conduction.
• Other options incorrectly sequence cardiac flow.
Source: ECG Workout: Exercises in Arrhythmia Interpretation,
8th Edition – Chapter 1
