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 regular rhythm at 72 bpm, each QRS complex is
preceded by a uniform upright P wave, and the PR interval is
consistent at 0.16 seconds. Which structure is responsible for
initiating this normal impulse?
A. Atrioventricular (AV) node
B. Sinoatrial (SA) node
C. Bundle of His
D. Purkinje fibers
Correct Answer: B
,Rationale:
The presence of upright, consistent P waves preceding each
QRS with a normal PR interval indicates sinus rhythm. The SA
node, located in the right atrium, is the primary pacemaker and
initiates the impulse. The AV node delays conduction, while the
Bundle of His and Purkinje fibers conduct impulses further
down the conduction system.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 2
An ECG demonstrates a regular rhythm with a rate of 60 bpm.
The P wave is present before each QRS. Which phase of cardiac
physiology does the P wave represent?
A. Ventricular depolarization
B. Atrial repolarization
C. Atrial depolarization
D. Ventricular repolarization
Correct Answer: C
Rationale:
The P wave represents atrial depolarization, which corresponds
to atrial contraction and movement of blood through the atria.
Ventricular depolarization is represented by the QRS complex,
and ventricular repolarization by the T wave. Atrial
repolarization is not typically visible on ECG.
, Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 3
An ECG strip shows normal sinus rhythm. Blood flow following
atrial contraction moves through which heart valves
immediately after the P wave?
A. Aortic and pulmonic valves
B. Mitral and tricuspid valves
C. Pulmonic and tricuspid valves
D. Aortic and mitral valves
Correct Answer: B
Rationale:
After atrial depolarization (P wave), the atria contract, pushing
blood through the atrioventricular valves—the mitral (left side)
and tricuspid (right side)—into the ventricles. Semilunar valves
(aortic and pulmonic) open later during ventricular contraction.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 4
An ECG shows a regular rhythm at 80 bpm with normal P waves
and QRS complexes. During ventricular depolarization (QRS
complex), which valves are expected to open?
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 regular rhythm at 72 bpm, each QRS complex is
preceded by a uniform upright P wave, and the PR interval is
consistent at 0.16 seconds. Which structure is responsible for
initiating this normal impulse?
A. Atrioventricular (AV) node
B. Sinoatrial (SA) node
C. Bundle of His
D. Purkinje fibers
Correct Answer: B
,Rationale:
The presence of upright, consistent P waves preceding each
QRS with a normal PR interval indicates sinus rhythm. The SA
node, located in the right atrium, is the primary pacemaker and
initiates the impulse. The AV node delays conduction, while the
Bundle of His and Purkinje fibers conduct impulses further
down the conduction system.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 2
An ECG demonstrates a regular rhythm with a rate of 60 bpm.
The P wave is present before each QRS. Which phase of cardiac
physiology does the P wave represent?
A. Ventricular depolarization
B. Atrial repolarization
C. Atrial depolarization
D. Ventricular repolarization
Correct Answer: C
Rationale:
The P wave represents atrial depolarization, which corresponds
to atrial contraction and movement of blood through the atria.
Ventricular depolarization is represented by the QRS complex,
and ventricular repolarization by the T wave. Atrial
repolarization is not typically visible on ECG.
, Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 3
An ECG strip shows normal sinus rhythm. Blood flow following
atrial contraction moves through which heart valves
immediately after the P wave?
A. Aortic and pulmonic valves
B. Mitral and tricuspid valves
C. Pulmonic and tricuspid valves
D. Aortic and mitral valves
Correct Answer: B
Rationale:
After atrial depolarization (P wave), the atria contract, pushing
blood through the atrioventricular valves—the mitral (left side)
and tricuspid (right side)—into the ventricles. Semilunar valves
(aortic and pulmonic) open later during ventricular contraction.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 4
An ECG shows a regular rhythm at 80 bpm with normal P waves
and QRS complexes. During ventricular depolarization (QRS
complex), which valves are expected to open?
