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. Posttest
Question 1
A patient’s ECG shows a regular rhythm at 72 bpm with upright
P waves before each QRS complex and consistent PR intervals.
Which structure is responsible for initiating this electrical
activity?
A. Atrioventricular (AV) node
B. Sinoatrial (SA) node
C. Bundle of His
D. Purkinje fibers
Correct Answer: B
,Rationale:
The SA node is the primary pacemaker of the heart and initiates
the impulse that produces a normal sinus rhythm. The ECG
shows normal sinus characteristics (upright P waves, consistent
PR interval, regular rhythm).
• A is incorrect: AV node delays conduction but does not
initiate normal rhythm.
• C and D conduct impulses but do not originate them.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 2
An ECG shows a regular rhythm at 80 bpm. Each P wave is
followed by a QRS complex. Which mechanical event
corresponds to the P wave?
A. Ventricular depolarization
B. Atrial depolarization
C. Ventricular repolarization
D. Atrial repolarization
Correct Answer: B
Rationale:
The P wave represents atrial depolarization, which leads to
, atrial contraction and movement of blood through the
atrioventricular valves.
• A corresponds to QRS complex
• C corresponds to T wave
• D is not visible on ECG
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 3
A patient’s ECG demonstrates a normal sinus rhythm. Blood
flow following atrial depolarization moves through which
valves?
A. Semilunar valves
B. Aortic and pulmonic valves
C. Mitral and tricuspid valves
D. Coronary valves
Correct Answer: C
Rationale:
After atrial depolarization (P wave), atria contract and push
blood through the mitral and tricuspid valves into the
ventricles.
• A and B involve ventricular ejection
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. Posttest
Question 1
A patient’s ECG shows a regular rhythm at 72 bpm with upright
P waves before each QRS complex and consistent PR intervals.
Which structure is responsible for initiating this electrical
activity?
A. Atrioventricular (AV) node
B. Sinoatrial (SA) node
C. Bundle of His
D. Purkinje fibers
Correct Answer: B
,Rationale:
The SA node is the primary pacemaker of the heart and initiates
the impulse that produces a normal sinus rhythm. The ECG
shows normal sinus characteristics (upright P waves, consistent
PR interval, regular rhythm).
• A is incorrect: AV node delays conduction but does not
initiate normal rhythm.
• C and D conduct impulses but do not originate them.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 2
An ECG shows a regular rhythm at 80 bpm. Each P wave is
followed by a QRS complex. Which mechanical event
corresponds to the P wave?
A. Ventricular depolarization
B. Atrial depolarization
C. Ventricular repolarization
D. Atrial repolarization
Correct Answer: B
Rationale:
The P wave represents atrial depolarization, which leads to
, atrial contraction and movement of blood through the
atrioventricular valves.
• A corresponds to QRS complex
• C corresponds to T wave
• D is not visible on ECG
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 3
A patient’s ECG demonstrates a normal sinus rhythm. Blood
flow following atrial depolarization moves through which
valves?
A. Semilunar valves
B. Aortic and pulmonic valves
C. Mitral and tricuspid valves
D. Coronary valves
Correct Answer: C
Rationale:
After atrial depolarization (P wave), atria contract and push
blood through the mitral and tricuspid valves into the
ventricles.
• A and B involve ventricular ejection
