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 with upright P waves
preceding each QRS complex and a normal PR interval. This
pattern reflects proper conduction through which cardiac
structure first?
A. Atrioventricular (AV) node
B. Sinoatrial (SA) node
C. Bundle branches
D. Purkinje fibers
Correct Answer: B
,Rationale:
The upright P wave before each QRS indicates that
depolarization begins in the SA node, the heart’s primary
pacemaker.
• A is incorrect: AV node delays conduction but does not
initiate it.
• C and D are part of ventricular conduction, reflected in
QRS, not P wave.
Source: ECG Workout, 8th Edition – Chapter 1
Question 2
An ECG rhythm shows normal sinus complexes. Which
mechanical event corresponds with the P wave seen on the
ECG?
A. Ventricular contraction
B. Atrial depolarization
C. Ventricular repolarization
D. Closure of semilunar valves
Correct Answer: B
Rationale:
The P wave represents atrial depolarization, which precedes
atrial contraction.
• A corresponds to QRS.
• C corresponds to T wave.
, • D is mechanical and not directly visualized on ECG.
Source: ECG Workout, 8th Edition – Chapter 1
Question 3
An ECG demonstrates normal conduction. Blood flow following
the P wave most directly moves from which structure to the
ventricles?
A. Pulmonary artery
B. Left atrium
C. Atria through AV valves
D. Aorta
Correct Answer: C
Rationale:
Atrial depolarization (P wave) causes atrial contraction, pushing
blood through AV valves into ventricles.
• A and D are outflow vessels after ventricular contraction.
• B is incomplete without valve passage.
Source: ECG Workout, 8th Edition – Chapter 1
Question 4
An ECG shows a normal QRS complex following atrial activity.
Which structure is primarily responsible for the delay between
P wave and QRS?
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 with upright P waves
preceding each QRS complex and a normal PR interval. This
pattern reflects proper conduction through which cardiac
structure first?
A. Atrioventricular (AV) node
B. Sinoatrial (SA) node
C. Bundle branches
D. Purkinje fibers
Correct Answer: B
,Rationale:
The upright P wave before each QRS indicates that
depolarization begins in the SA node, the heart’s primary
pacemaker.
• A is incorrect: AV node delays conduction but does not
initiate it.
• C and D are part of ventricular conduction, reflected in
QRS, not P wave.
Source: ECG Workout, 8th Edition – Chapter 1
Question 2
An ECG rhythm shows normal sinus complexes. Which
mechanical event corresponds with the P wave seen on the
ECG?
A. Ventricular contraction
B. Atrial depolarization
C. Ventricular repolarization
D. Closure of semilunar valves
Correct Answer: B
Rationale:
The P wave represents atrial depolarization, which precedes
atrial contraction.
• A corresponds to QRS.
• C corresponds to T wave.
, • D is mechanical and not directly visualized on ECG.
Source: ECG Workout, 8th Edition – Chapter 1
Question 3
An ECG demonstrates normal conduction. Blood flow following
the P wave most directly moves from which structure to the
ventricles?
A. Pulmonary artery
B. Left atrium
C. Atria through AV valves
D. Aorta
Correct Answer: C
Rationale:
Atrial depolarization (P wave) causes atrial contraction, pushing
blood through AV valves into ventricles.
• A and D are outflow vessels after ventricular contraction.
• B is incomplete without valve passage.
Source: ECG Workout, 8th Edition – Chapter 1
Question 4
An ECG shows a normal QRS complex following atrial activity.
Which structure is primarily responsible for the delay between
P wave and QRS?
