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
An ECG shows a normal sinus rhythm at 72 bpm with a
consistent P wave before each QRS. Which cardiac structure is
responsible for initiating the electrical impulse seen as the P
wave?
A. Atrioventricular (AV) node
B. Sinoatrial (SA) node
C. Bundle of His
D. Purkinje fibers
Correct Answer: B
,Rationale:
The P wave represents atrial depolarization initiated by the SA
node, the heart’s natural pacemaker. The AV node delays
conduction, while the Bundle of His and Purkinje fibers conduct
impulses to the ventricles.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 2
A patient’s ECG shows a regular rhythm at 68 bpm with normal
P waves and QRS complexes. Which valve must be open during
ventricular systole for blood to be ejected into systemic
circulation?
A. Mitral valve
B. Tricuspid valve
C. Aortic valve
D. Pulmonic valve
Correct Answer: C
Rationale:
During ventricular systole, the aortic valve opens to allow blood
flow from the left ventricle into systemic circulation. The mitral
and tricuspid valves close, and the pulmonic valve directs blood
to the lungs.
, Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 3
An ECG demonstrates a regular rhythm with normal intervals.
Which sequence correctly represents the normal pathway of
electrical conduction that corresponds with coordinated blood
flow?
A. AV node → SA node → ventricles → atria
B. SA node → AV node → Bundle of His → Purkinje fibers
C. Purkinje fibers → Bundle of His → SA node → AV node
D. AV node → Purkinje fibers → SA node → Bundle of His
Correct Answer: B
Rationale:
Normal conduction begins at the SA node, travels to the AV
node, then through the Bundle of His and Purkinje fibers,
ensuring coordinated contraction and blood flow.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 4
A patient’s ECG shows normal sinus rhythm. Which structure
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
An ECG shows a normal sinus rhythm at 72 bpm with a
consistent P wave before each QRS. Which cardiac structure is
responsible for initiating the electrical impulse seen as the P
wave?
A. Atrioventricular (AV) node
B. Sinoatrial (SA) node
C. Bundle of His
D. Purkinje fibers
Correct Answer: B
,Rationale:
The P wave represents atrial depolarization initiated by the SA
node, the heart’s natural pacemaker. The AV node delays
conduction, while the Bundle of His and Purkinje fibers conduct
impulses to the ventricles.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 2
A patient’s ECG shows a regular rhythm at 68 bpm with normal
P waves and QRS complexes. Which valve must be open during
ventricular systole for blood to be ejected into systemic
circulation?
A. Mitral valve
B. Tricuspid valve
C. Aortic valve
D. Pulmonic valve
Correct Answer: C
Rationale:
During ventricular systole, the aortic valve opens to allow blood
flow from the left ventricle into systemic circulation. The mitral
and tricuspid valves close, and the pulmonic valve directs blood
to the lungs.
, Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 3
An ECG demonstrates a regular rhythm with normal intervals.
Which sequence correctly represents the normal pathway of
electrical conduction that corresponds with coordinated blood
flow?
A. AV node → SA node → ventricles → atria
B. SA node → AV node → Bundle of His → Purkinje fibers
C. Purkinje fibers → Bundle of His → SA node → AV node
D. AV node → Purkinje fibers → SA node → Bundle of His
Correct Answer: B
Rationale:
Normal conduction begins at the SA node, travels to the AV
node, then through the Bundle of His and Purkinje fibers,
ensuring coordinated contraction and blood flow.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 4
A patient’s ECG shows normal sinus rhythm. Which structure
