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 before each QRS complex, consistent PR
intervals, and narrow QRS complexes. 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 SA node is the heart’s primary pacemaker and initiates
impulses that produce a normal sinus rhythm. The presence of
upright P waves before each QRS indicates atrial depolarization
originating from the SA node.
• A is incorrect: AV node delays conduction but does not
initiate normal rhythm
• C and D are conduction pathways, not pacemakers
Source: ECG Workout: Exercises in Arrhythmia Interpretation,
8th Edition – Chapter 1
Question 2
An ECG shows a normal sinus rhythm. Which cardiac valve is
open during ventricular depolarization (QRS complex), allowing
blood ejection?
A. Mitral valve
B. Tricuspid valve
C. Aortic valve
D. Pulmonic valve
Correct Answer: C
Rationale:
During ventricular depolarization (QRS), the ventricles contract
(systole), causing the aortic and pulmonic valves to open for
, blood ejection. The aortic valve allows blood to flow into
systemic circulation.
• A and B are open during ventricular filling (diastole)
• D is also open during systole but refers to pulmonary flow;
aortic is primary systemic output
Source: ECG Workout: Exercises in Arrhythmia Interpretation,
8th Edition – Chapter 1
Question 3
An ECG demonstrates a regular rhythm with proper P-QRS-T
sequence. Blood flow corresponding to atrial depolarization (P
wave) moves from which chamber?
A. Ventricles to arteries
B. Atria to ventricles
C. Veins to atria
D. Lungs to left atrium
Correct Answer: B
Rationale:
The P wave represents atrial depolarization, which triggers
atrial contraction and pushes blood from atria into ventricles.
• A corresponds to ventricular systole
• C and D describe passive filling, not active contraction
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 before each QRS complex, consistent PR
intervals, and narrow QRS complexes. 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 SA node is the heart’s primary pacemaker and initiates
impulses that produce a normal sinus rhythm. The presence of
upright P waves before each QRS indicates atrial depolarization
originating from the SA node.
• A is incorrect: AV node delays conduction but does not
initiate normal rhythm
• C and D are conduction pathways, not pacemakers
Source: ECG Workout: Exercises in Arrhythmia Interpretation,
8th Edition – Chapter 1
Question 2
An ECG shows a normal sinus rhythm. Which cardiac valve is
open during ventricular depolarization (QRS complex), allowing
blood ejection?
A. Mitral valve
B. Tricuspid valve
C. Aortic valve
D. Pulmonic valve
Correct Answer: C
Rationale:
During ventricular depolarization (QRS), the ventricles contract
(systole), causing the aortic and pulmonic valves to open for
, blood ejection. The aortic valve allows blood to flow into
systemic circulation.
• A and B are open during ventricular filling (diastole)
• D is also open during systole but refers to pulmonary flow;
aortic is primary systemic output
Source: ECG Workout: Exercises in Arrhythmia Interpretation,
8th Edition – Chapter 1
Question 3
An ECG demonstrates a regular rhythm with proper P-QRS-T
sequence. Blood flow corresponding to atrial depolarization (P
wave) moves from which chamber?
A. Ventricles to arteries
B. Atria to ventricles
C. Veins to atria
D. Lungs to left atrium
Correct Answer: B
Rationale:
The P wave represents atrial depolarization, which triggers
atrial contraction and pushes blood from atria into ventricles.
• A corresponds to ventricular systole
• C and D describe passive filling, not active contraction
