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 tracing shows a normal P wave preceding each QRS
complex with a consistent PR interval. Which structure is
primarily 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 heart’s natural pacemaker and initiates
electrical impulses that produce the P wave.
• A: AV node delays conduction, not initiates it
• C & D: Conduct impulses downstream
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 2
An ECG shows a regular rhythm with each P wave followed by a
QRS. Which mechanical event corresponds to the P wave?
A. Ventricular contraction
B. Atrial contraction
C. Ventricular relaxation
D. Closure of semilunar valves
Correct Answer: B
Rationale:
The P wave represents atrial depolarization, which leads to
atrial contraction.
• A: Corresponds to QRS
• C: Related to T wave
• D: Mechanical event not directly seen on ECG
, Source: Chapter 1
Question 3
A patient’s ECG shows normal sinus rhythm. Blood is flowing
from the left atrium to the left ventricle. Which valve must be
open?
A. Aortic valve
B. Pulmonic valve
C. Tricuspid valve
D. Mitral valve
Correct Answer: D
Rationale:
Blood flows from left atrium to left ventricle through the mitral
valve.
• C: Right side equivalent
• A & B: Semilunar valves (exit from ventricles)
Source: Chapter 1
Question 4
An ECG demonstrates normal conduction. After ventricular
depolarization, blood is ejected into systemic circulation.
Through which structure does it leave the heart?
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 tracing shows a normal P wave preceding each QRS
complex with a consistent PR interval. Which structure is
primarily 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 heart’s natural pacemaker and initiates
electrical impulses that produce the P wave.
• A: AV node delays conduction, not initiates it
• C & D: Conduct impulses downstream
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 2
An ECG shows a regular rhythm with each P wave followed by a
QRS. Which mechanical event corresponds to the P wave?
A. Ventricular contraction
B. Atrial contraction
C. Ventricular relaxation
D. Closure of semilunar valves
Correct Answer: B
Rationale:
The P wave represents atrial depolarization, which leads to
atrial contraction.
• A: Corresponds to QRS
• C: Related to T wave
• D: Mechanical event not directly seen on ECG
, Source: Chapter 1
Question 3
A patient’s ECG shows normal sinus rhythm. Blood is flowing
from the left atrium to the left ventricle. Which valve must be
open?
A. Aortic valve
B. Pulmonic valve
C. Tricuspid valve
D. Mitral valve
Correct Answer: D
Rationale:
Blood flows from left atrium to left ventricle through the mitral
valve.
• C: Right side equivalent
• A & B: Semilunar valves (exit from ventricles)
Source: Chapter 1
Question 4
An ECG demonstrates normal conduction. After ventricular
depolarization, blood is ejected into systemic circulation.
Through which structure does it leave the heart?
