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 rhythm strip shows a regular rhythm at 72 bpm with
upright P waves preceding each QRS complex and a normal PR
interval. Which cardiac structure is responsible for initiating this
impulse?
A. Atrioventricular (AV) node
B. Sinoatrial (SA) node
C. Bundle of His
D. Purkinje fibers
Correct Answer: B
,Rationale:
The presence of upright P waves before each QRS indicates
normal sinus rhythm. The SA node is the primary pacemaker
responsible for initiating impulses. The AV node delays
conduction, while the Bundle of His and Purkinje fibers conduct
impulses through the ventricles.
Source: ECG Workout: Exercises in Arrhythmia Interpretation,
8th Edition – Chapter 1
Question 2
An ECG shows a regular rhythm at 80 bpm with consistent PR
intervals. Proper conduction through which structure ensures
the delay between atrial and ventricular depolarization?
A. SA node
B. AV node
C. Bundle branches
D. Purkinje fibers
Correct Answer: B
Rationale:
The PR interval represents conduction from atria to ventricles.
The AV node provides a delay allowing ventricular filling. The SA
node initiates the impulse, while bundle branches and Purkinje
fibers conduct impulses rapidly through the ventricles.
Source: ECG Workout: Exercises in Arrhythmia Interpretation,
8th Edition – Chapter 1
, Question 3
An ECG demonstrates normal sinus rhythm. Efficient ventricular
filling prior to each QRS complex depends on proper function of
which heart valves?
A. Aortic and pulmonic valves
B. Mitral and tricuspid valves
C. Pulmonic and tricuspid valves
D. Aortic and mitral valves
Correct Answer: B
Rationale:
Atrial contraction (P wave) pushes blood through the mitral and
tricuspid valves into the ventricles. Semilunar valves (aortic and
pulmonic) open during ventricular contraction, not filling.
Source: ECG Workout: Exercises in Arrhythmia Interpretation,
8th Edition – Chapter 1
Question 4
A patient’s ECG shows normal sinus rhythm. After ventricular
depolarization (QRS complex), blood is ejected into which
vessels?
A. Pulmonary veins and aorta
B. Pulmonary artery and aorta
C. Vena cava and pulmonary veins
D. Coronary arteries and vena cava
Correct Answer: B
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 rhythm strip shows a regular rhythm at 72 bpm with
upright P waves preceding each QRS complex and a normal PR
interval. Which cardiac structure is responsible for initiating this
impulse?
A. Atrioventricular (AV) node
B. Sinoatrial (SA) node
C. Bundle of His
D. Purkinje fibers
Correct Answer: B
,Rationale:
The presence of upright P waves before each QRS indicates
normal sinus rhythm. The SA node is the primary pacemaker
responsible for initiating impulses. The AV node delays
conduction, while the Bundle of His and Purkinje fibers conduct
impulses through the ventricles.
Source: ECG Workout: Exercises in Arrhythmia Interpretation,
8th Edition – Chapter 1
Question 2
An ECG shows a regular rhythm at 80 bpm with consistent PR
intervals. Proper conduction through which structure ensures
the delay between atrial and ventricular depolarization?
A. SA node
B. AV node
C. Bundle branches
D. Purkinje fibers
Correct Answer: B
Rationale:
The PR interval represents conduction from atria to ventricles.
The AV node provides a delay allowing ventricular filling. The SA
node initiates the impulse, while bundle branches and Purkinje
fibers conduct impulses rapidly through the ventricles.
Source: ECG Workout: Exercises in Arrhythmia Interpretation,
8th Edition – Chapter 1
, Question 3
An ECG demonstrates normal sinus rhythm. Efficient ventricular
filling prior to each QRS complex depends on proper function of
which heart valves?
A. Aortic and pulmonic valves
B. Mitral and tricuspid valves
C. Pulmonic and tricuspid valves
D. Aortic and mitral valves
Correct Answer: B
Rationale:
Atrial contraction (P wave) pushes blood through the mitral and
tricuspid valves into the ventricles. Semilunar valves (aortic and
pulmonic) open during ventricular contraction, not filling.
Source: ECG Workout: Exercises in Arrhythmia Interpretation,
8th Edition – Chapter 1
Question 4
A patient’s ECG shows normal sinus rhythm. After ventricular
depolarization (QRS complex), blood is ejected into which
vessels?
A. Pulmonary veins and aorta
B. Pulmonary artery and aorta
C. Vena cava and pulmonary veins
D. Coronary arteries and vena cava
Correct Answer: B
