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
A patient’s ECG shows a regular rhythm at 72 bpm with upright
P waves preceding each QRS complex. The nurse recalls that
the impulse originates from a structure located in which part of
the heart?
A. Left ventricle
B. Right atrium near the superior vena cava
C. Interventricular septum
D. Bundle branches
,Correct Answer: B
Rationale:
The ECG shows a normal sinus rhythm (upright P waves before
each QRS, regular rate). This indicates the impulse originates
from the sinoatrial (SA) node, located in the right atrium near
the superior vena cava.
A is incorrect (ventricular origin would alter QRS).
C and D are conduction pathways, not the primary pacemaker.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 2
An ECG rhythm demonstrates a regular rate of 68 bpm with
normal P waves and PR intervals. Proper opening of which valve
allows blood to flow just before ventricular depolarization (QRS
complex)?
A. Aortic valve
B. Pulmonic valve
C. Mitral valve
D. Tricuspid valve
Correct Answer: C
Rationale:
Before the QRS complex (ventricular depolarization), the atria
contract, pushing blood through the atrioventricular valves. The
mitral valve allows flow from left atrium to left ventricle.
, D is also an AV valve but on the right side; question refers to
systemic flow.
A and B are semilunar valves, opening after ventricular
contraction.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 3
A patient’s ECG shows normal sinus rhythm. Which sequence
correctly represents blood flow associated with electrical
activity beginning at the P wave?
A. Ventricles → atria → lungs
B. Atria → ventricles → lungs or body
C. Lungs → ventricles → atria
D. Ventricles → lungs → atria
Correct Answer: B
Rationale:
The P wave represents atrial depolarization leading to atrial
contraction. Blood flows from atria to ventricles, then ventricles
pump blood to lungs (right side) or body (left side).
Other options reverse or misplace flow sequence.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
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
A patient’s ECG shows a regular rhythm at 72 bpm with upright
P waves preceding each QRS complex. The nurse recalls that
the impulse originates from a structure located in which part of
the heart?
A. Left ventricle
B. Right atrium near the superior vena cava
C. Interventricular septum
D. Bundle branches
,Correct Answer: B
Rationale:
The ECG shows a normal sinus rhythm (upright P waves before
each QRS, regular rate). This indicates the impulse originates
from the sinoatrial (SA) node, located in the right atrium near
the superior vena cava.
A is incorrect (ventricular origin would alter QRS).
C and D are conduction pathways, not the primary pacemaker.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 2
An ECG rhythm demonstrates a regular rate of 68 bpm with
normal P waves and PR intervals. Proper opening of which valve
allows blood to flow just before ventricular depolarization (QRS
complex)?
A. Aortic valve
B. Pulmonic valve
C. Mitral valve
D. Tricuspid valve
Correct Answer: C
Rationale:
Before the QRS complex (ventricular depolarization), the atria
contract, pushing blood through the atrioventricular valves. The
mitral valve allows flow from left atrium to left ventricle.
, D is also an AV valve but on the right side; question refers to
systemic flow.
A and B are semilunar valves, opening after ventricular
contraction.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 3
A patient’s ECG shows normal sinus rhythm. Which sequence
correctly represents blood flow associated with electrical
activity beginning at the P wave?
A. Ventricles → atria → lungs
B. Atria → ventricles → lungs or body
C. Lungs → ventricles → atria
D. Ventricles → lungs → atria
Correct Answer: B
Rationale:
The P wave represents atrial depolarization leading to atrial
contraction. Blood flows from atria to ventricles, then ventricles
pump blood to lungs (right side) or body (left side).
Other options reverse or misplace flow sequence.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
