ECG WORKOUT
EXERCISES IN ARRHYTHMIA
INTERPRETATION
8TH EDITION
• AUTHOR(S)JANE HUFF
TEST BANK
1
Reference
Ch. 1 — Description and Location of the Heart
Question Stem
A patient with blunt chest trauma complains of anterior chest
pain and you need to estimate whether the pericardium or
myocardium is most likely affected. Based on surface anatomy,
which structure lies most directly posterior to the sternum at
,the level of the 5th intercostal space and is therefore most
vulnerable to anterior impact? Interpret location using external
landmarks and cardiac relations.
A. Left atrium
B. Right ventricle
C. Left ventricle apex
D. Right atrium
Correct Answer
B. Right ventricle
Rationales
Correct (B): The right ventricle forms the majority of the
anterior cardiac surface and lies directly posterior to the lower
sternum and 3rd–5th left intercostal spaces, making it most
exposed to anterior trauma. Clinically, anterior chest impacts
commonly injure the RV.
Incorrect (A): The left atrium is posterior, adjacent to the
esophagus, not immediately beneath the sternum.
Incorrect (C): The left ventricular apex is more lateral and
inferior (left 5th intercostal space midclavicular line), not the
midline anterior surface.
Incorrect (D): The right atrium is more right-sided and
contributes less to the central anterior surface than the right
ventricle.
Teaching Point
Right ventricle forms most of the heart’s anterior surface;
vulnerable to anterior chest trauma.
,Citation
Huff, J. (2022). ECG Workout: Exercises in Arrhythmia
Interpretation (8th ed.). Ch. 1.
2
Reference
Ch. 1 — Description and Location of the Heart
Question Stem
A nurse must choose the best external landmark to locate the
point of maximal impulse (PMI) for palpation. Which landmark
location most accurately predicts the PMI in a healthy adult
with normal cardiac position?
A. Left 3rd intercostal space, midclavicular line
B. Left 5th intercostal space, midclavicular line
C. Left 5th intercostal space, anterior axillary line
D. Right 5th intercostal space, midclavicular line
Correct Answer
B. Left 5th intercostal space, midclavicular line
Rationales
Correct (B): The PMI typically lies at the left 5th intercostal
space at the midclavicular line in a normal-sized adult and
corresponds to the left ventricular apex.
Incorrect (A): The 3rd intercostal space is too high; the PMI is
usually lower.
Incorrect (C): Anterior axillary line is lateral to the typical PMI
, location.
Incorrect (D): Right-sided location is inconsistent with the left
ventricular apex position.
Teaching Point
PMI = left 5th intercostal space at midclavicular line in normal
cardiac position.
Citation
Huff, J. (2022). ECG Workout: Exercises in Arrhythmia
Interpretation (8th ed.). Ch. 1.
3
Reference
Ch. 1 — Function of the Heart
Question Stem
A post-op patient has low urine output and cool extremities
despite normal blood pressure. You suspect decreased stroke
volume. Which cardiac mechanism most directly reduces stroke
volume and can explain these signs when impaired?
A. Increased contractility of ventricular myocardium
B. Decreased preload (reduced venous return)
C. Reduced afterload (decreased systemic vascular resistance)
D. Hyperdynamic heart rate
Correct Answer
B. Decreased preload (reduced venous return)
EXERCISES IN ARRHYTHMIA
INTERPRETATION
8TH EDITION
• AUTHOR(S)JANE HUFF
TEST BANK
1
Reference
Ch. 1 — Description and Location of the Heart
Question Stem
A patient with blunt chest trauma complains of anterior chest
pain and you need to estimate whether the pericardium or
myocardium is most likely affected. Based on surface anatomy,
which structure lies most directly posterior to the sternum at
,the level of the 5th intercostal space and is therefore most
vulnerable to anterior impact? Interpret location using external
landmarks and cardiac relations.
A. Left atrium
B. Right ventricle
C. Left ventricle apex
D. Right atrium
Correct Answer
B. Right ventricle
Rationales
Correct (B): The right ventricle forms the majority of the
anterior cardiac surface and lies directly posterior to the lower
sternum and 3rd–5th left intercostal spaces, making it most
exposed to anterior trauma. Clinically, anterior chest impacts
commonly injure the RV.
Incorrect (A): The left atrium is posterior, adjacent to the
esophagus, not immediately beneath the sternum.
Incorrect (C): The left ventricular apex is more lateral and
inferior (left 5th intercostal space midclavicular line), not the
midline anterior surface.
Incorrect (D): The right atrium is more right-sided and
contributes less to the central anterior surface than the right
ventricle.
Teaching Point
Right ventricle forms most of the heart’s anterior surface;
vulnerable to anterior chest trauma.
,Citation
Huff, J. (2022). ECG Workout: Exercises in Arrhythmia
Interpretation (8th ed.). Ch. 1.
2
Reference
Ch. 1 — Description and Location of the Heart
Question Stem
A nurse must choose the best external landmark to locate the
point of maximal impulse (PMI) for palpation. Which landmark
location most accurately predicts the PMI in a healthy adult
with normal cardiac position?
A. Left 3rd intercostal space, midclavicular line
B. Left 5th intercostal space, midclavicular line
C. Left 5th intercostal space, anterior axillary line
D. Right 5th intercostal space, midclavicular line
Correct Answer
B. Left 5th intercostal space, midclavicular line
Rationales
Correct (B): The PMI typically lies at the left 5th intercostal
space at the midclavicular line in a normal-sized adult and
corresponds to the left ventricular apex.
Incorrect (A): The 3rd intercostal space is too high; the PMI is
usually lower.
Incorrect (C): Anterior axillary line is lateral to the typical PMI
, location.
Incorrect (D): Right-sided location is inconsistent with the left
ventricular apex position.
Teaching Point
PMI = left 5th intercostal space at midclavicular line in normal
cardiac position.
Citation
Huff, J. (2022). ECG Workout: Exercises in Arrhythmia
Interpretation (8th ed.). Ch. 1.
3
Reference
Ch. 1 — Function of the Heart
Question Stem
A post-op patient has low urine output and cool extremities
despite normal blood pressure. You suspect decreased stroke
volume. Which cardiac mechanism most directly reduces stroke
volume and can explain these signs when impaired?
A. Increased contractility of ventricular myocardium
B. Decreased preload (reduced venous return)
C. Reduced afterload (decreased systemic vascular resistance)
D. Hyperdynamic heart rate
Correct Answer
B. Decreased preload (reduced venous return)
