ECG WORKOUT
EXERCISES IN ARRHYTHMIA
INTERPRETATION
8TH EDITION
• AUTHOR(S)JANE HUFF
TEST BANK
1️⃣ Reference
Ch. 1 — Description and Location of the Heart
Question (2–3 sentences)
A 68-year-old patient is lying supine and you are asked to
estimate the surface location of the heart for applying
monitoring electrodes. Based on standard thoracic anatomy,
which description best locates the heart’s position within the
thorax? Use landmarks that will guide accurate external
placement and expected cardiac silhouette location.
,Options
A. The heart lies predominantly in the right hemithorax with its
apex at the level of the right fifth intercostal space at the
midclavicular line.
B. The heart lies posterior to the sternum entirely within the
mediastinum with the apex at the level of the T10 vertebra.
C. The heart lies mostly to the left of midline in the middle
mediastinum with its apex near the left fifth intercostal space at
the midclavicular line.
D. The heart is centered strictly on the midline with both
ventricles sharing equal portions in both hemithoraces.
Correct answer
C
Rationales
Correct (C): The heart sits in the middle mediastinum, more to
the left of midline; the apex typically projects at the left fifth
intercostal space at the midclavicular line, guiding external
landmarking.
Incorrect (A): The heart is not predominantly right-sided; apex is
left-sided, not right fifth intercostal space.
Incorrect (B): The heart is anterior within the thorax and not
located as posterior as T10; it lies behind the sternum but
extends laterally and inferiorly.
Incorrect (D): The heart is not strictly midline; the left side (left
ventricle/apex) is more lateral.
,Teaching point
Apex projects to left fifth intercostal space at midclavicular line;
heart lies left of midline.
Citation
Huff, J. (2022). ECG Workout: Exercises in Arrhythmia
Interpretation (8th ed.). Ch. 1.
2⃣ Reference
Ch. 1 — Function of the Heart
Question (2–3 sentences)
A patient with decreased cardiac output shows cold extremities
and low urine output. Which description best explains the
primary cardiac function that, when impaired, produces these
systemic signs? Use basic heart mechanics to choose the best
physiologic explanation.
Options
A. The heart serves only as an electrical pacemaker; cold
extremities result from intrinsic pacemaker failure.
B. The heart functions as a dual pump delivering blood to
systemic and pulmonary circuits; decreased pump effectiveness
reduces tissue perfusion.
C. The heart’s primary role is to filter venous blood; decreased
filtering causes fluid to pool in extremities.
D. The heart acts mainly to store oxygenated blood; low storage
capacity leads to oliguria.
, Correct answer
B
Rationales
Correct (B): The heart is a dual pump (right → pulmonary, left
→ systemic); impairment of pumping (cardiac output) reduces
perfusion causing cold extremities and reduced urine output.
Incorrect (A): The heart includes pacemaking but its primary
systemic role is pumping blood, not solely electrical pacing.
Incorrect (C): The heart is not a blood filter; venous pooling is
not due to filtering failure.
Incorrect (D): The heart does not primarily “store” blood; it
pumps it — storage is not the primary mechanism causing
oliguria.
Teaching point
Heart is a dual pump; reduced pump function lowers systemic
perfusion and urine output.
Citation
Huff, J. (2022). ECG Workout: Exercises in Arrhythmia
Interpretation (8th ed.). Ch. 1.
3⃣ Reference
Ch. 1 — Heart Surfaces
Question (2–3 sentences)
During bedside assessment you are asked where auscultation of
the mitral valve is most reliable. Which surface/landmark
EXERCISES IN ARRHYTHMIA
INTERPRETATION
8TH EDITION
• AUTHOR(S)JANE HUFF
TEST BANK
1️⃣ Reference
Ch. 1 — Description and Location of the Heart
Question (2–3 sentences)
A 68-year-old patient is lying supine and you are asked to
estimate the surface location of the heart for applying
monitoring electrodes. Based on standard thoracic anatomy,
which description best locates the heart’s position within the
thorax? Use landmarks that will guide accurate external
placement and expected cardiac silhouette location.
,Options
A. The heart lies predominantly in the right hemithorax with its
apex at the level of the right fifth intercostal space at the
midclavicular line.
B. The heart lies posterior to the sternum entirely within the
mediastinum with the apex at the level of the T10 vertebra.
C. The heart lies mostly to the left of midline in the middle
mediastinum with its apex near the left fifth intercostal space at
the midclavicular line.
D. The heart is centered strictly on the midline with both
ventricles sharing equal portions in both hemithoraces.
Correct answer
C
Rationales
Correct (C): The heart sits in the middle mediastinum, more to
the left of midline; the apex typically projects at the left fifth
intercostal space at the midclavicular line, guiding external
landmarking.
Incorrect (A): The heart is not predominantly right-sided; apex is
left-sided, not right fifth intercostal space.
Incorrect (B): The heart is anterior within the thorax and not
located as posterior as T10; it lies behind the sternum but
extends laterally and inferiorly.
Incorrect (D): The heart is not strictly midline; the left side (left
ventricle/apex) is more lateral.
,Teaching point
Apex projects to left fifth intercostal space at midclavicular line;
heart lies left of midline.
Citation
Huff, J. (2022). ECG Workout: Exercises in Arrhythmia
Interpretation (8th ed.). Ch. 1.
2⃣ Reference
Ch. 1 — Function of the Heart
Question (2–3 sentences)
A patient with decreased cardiac output shows cold extremities
and low urine output. Which description best explains the
primary cardiac function that, when impaired, produces these
systemic signs? Use basic heart mechanics to choose the best
physiologic explanation.
Options
A. The heart serves only as an electrical pacemaker; cold
extremities result from intrinsic pacemaker failure.
B. The heart functions as a dual pump delivering blood to
systemic and pulmonary circuits; decreased pump effectiveness
reduces tissue perfusion.
C. The heart’s primary role is to filter venous blood; decreased
filtering causes fluid to pool in extremities.
D. The heart acts mainly to store oxygenated blood; low storage
capacity leads to oliguria.
, Correct answer
B
Rationales
Correct (B): The heart is a dual pump (right → pulmonary, left
→ systemic); impairment of pumping (cardiac output) reduces
perfusion causing cold extremities and reduced urine output.
Incorrect (A): The heart includes pacemaking but its primary
systemic role is pumping blood, not solely electrical pacing.
Incorrect (C): The heart is not a blood filter; venous pooling is
not due to filtering failure.
Incorrect (D): The heart does not primarily “store” blood; it
pumps it — storage is not the primary mechanism causing
oliguria.
Teaching point
Heart is a dual pump; reduced pump function lowers systemic
perfusion and urine output.
Citation
Huff, J. (2022). ECG Workout: Exercises in Arrhythmia
Interpretation (8th ed.). Ch. 1.
3⃣ Reference
Ch. 1 — Heart Surfaces
Question (2–3 sentences)
During bedside assessment you are asked where auscultation of
the mitral valve is most reliable. Which surface/landmark
