ECG WORKOUT
EXERCISES IN ARRHYTHMIA
INTERPRETATION
8TH EDITION
AUTHOR(S)JANE HUFF
TEST BANK
1. Anatomy and Physiology of the Heart — Description and
Location
Stem: A 46-year-old woman reports chest tightness and
shortness of breath after climbing stairs. Her apical impulse is
palpated at the 5th intercostal space, left midclavicular line,
and heart sounds are heard best over the left lower sternal
border. Which statement best describes the normal location of
the heart?
A. The heart lies in the mediastinum between the lungs, slightly
left of midline.
,B. The heart is located within the left pleural cavity.
C. The heart sits primarily in the lower abdomen behind the
diaphragm.
D. The heart is centered equally in the right and left thorax.
Correct Answer: A
Rationale — Correct Answer: The heart is located in the
mediastinum, between the lungs, behind the sternum, and
slightly left of midline. This position explains why the apical
impulse is usually felt in the left 5th intercostal space and why
nurses auscultate heart sounds over standard chest landmarks.
Rationale — Incorrect Options:
B is incorrect because the heart is not inside the pleural cavity.
C is incorrect because the heart is above the diaphragm in the
thorax.
D is incorrect because the heart is not centered equally in the
thorax.
Teaching Point: The heart sits in the mediastinum, not inside
either lung space.
Citation: Huff, J. (2022). ECG Workout: Exercises in Arrhythmia
Interpretation (8th ed.). Anatomy and Physiology of the Heart:
Description and Location.
,2. Anatomy and Physiology of the Heart — Function of the
Heart
Stem: A 72-year-old patient with fatigue and cool extremities
has a blood pressure of 88/52 mm Hg and weak peripheral
pulses. The nurse explains why impaired cardiac performance
causes poor tissue perfusion. Which statement best reflects the
heart’s primary function?
A. To pump blood through the pulmonary and systemic
circulations
B. To store oxygen for use during exercise
C. To filter toxins from the blood
D. To produce red blood cells in response to hypoxia
Correct Answer: A
Rationale — Correct Answer: The heart’s main function is to
act as a pump that moves blood through the pulmonary circuit
to the lungs and the systemic circuit to the body. When
pumping ability decreases, perfusion and oxygen delivery
decline, leading to hypotension, cool skin, and fatigue.
Rationale — Incorrect Options:
B is incorrect because oxygen storage occurs in hemoglobin
and tissues, not the heart.
C is incorrect because toxin filtration is primarily a liver and
kidney function.
,D is incorrect because erythropoietin is produced mainly by the
kidneys.
Teaching Point: The heart pumps blood; it does not store
oxygen or filter toxins.
Citation: Huff, J. (2022). ECG Workout: Exercises in Arrhythmia
Interpretation (8th ed.). Anatomy and Physiology of the Heart:
Function of the Heart.
3. Anatomy and Physiology of the Heart — Heart Surfaces
Stem: A postoperative cardiac patient has mild chest
discomfort, and the nurse reviews normal cardiac anatomy
while correlating the point of maximal impulse. Which
description of the heart’s orientation is correct?
A. The apex points down and to the left, and the base lies
posteriorly.
B. The apex points toward the right shoulder, and the base lies
anteriorly.
C. The heart lies flat with no directional orientation.
D. The base points inferiorly toward the diaphragm.
Correct Answer: A
,Rationale — Correct Answer: The apex of the heart points
inferiorly and to the left, while the base is oriented posteriorly.
This orientation helps explain the typical location of the apical
impulse and the heart’s relationship to surrounding structures.
Rationale — Incorrect Options:
B is incorrect because the apex does not point to the right
shoulder.
C is incorrect because the heart has a consistent anatomic
orientation.
D is incorrect because the base is superior and posterior, not
inferior.
Teaching Point: The apex points left; the base is posterior.
Citation: Huff, J. (2022). ECG Workout: Exercises in Arrhythmia
Interpretation (8th ed.). Anatomy and Physiology of the Heart:
Heart Surfaces.
4. Anatomy and Physiology of the Heart — Structure of the
Heart Wall
Stem: A patient with crushing chest pain has elevated troponin
and a new drop in ejection fraction. The nurse knows the
damaged tissue is responsible for contraction. Which layer of
the heart wall is most affected?
,A. Myocardium
B. Endocardium
C. Epicardium only
D. Fibrous pericardium
Correct Answer: A
Rationale — Correct Answer: The myocardium is the muscular
middle layer of the heart wall and is responsible for contraction
and pumping. Myocardial ischemia or infarction weakens pump
function, which can reduce cardiac output and tissue perfusion.
Rationale — Incorrect Options:
B is incorrect because the endocardium lines the chambers and
valves.
C is incorrect because the epicardium is the outer layer and is
not the primary pumping layer.
D is incorrect because the fibrous pericardium is a protective
sac around the heart.
Teaching Point: Myocardial injury directly reduces the heart’s
pumping strength.
Citation: Huff, J. (2022). ECG Workout: Exercises in Arrhythmia
Interpretation (8th ed.). Anatomy and Physiology of the Heart:
Structure of the Heart Wall.
,5. Anatomy and Physiology of the Heart — Heart Chambers
Stem: A dehydrated patient arrives with dizziness, tachycardia,
and low central venous pressure. The nurse reviews how blood
returns to the heart before entering the right-sided pump.
Which chamber receives venous blood from the body first?
A. Right atrium
B. Left atrium
C. Right ventricle
D. Left ventricle
Correct Answer: A
Rationale — Correct Answer: The right atrium receives
deoxygenated blood returning from the body through the
superior and inferior vena cava. From there, blood moves
through the tricuspid valve into the right ventricle.
Rationale — Incorrect Options:
B is incorrect because the left atrium receives oxygenated
blood from the lungs.
C is incorrect because the right ventricle receives blood after
the right atrium.
D is incorrect because the left ventricle receives blood after the
left atrium.
Teaching Point: Venous blood enters the right atrium first.
,Citation: Huff, J. (2022). ECG Workout: Exercises in Arrhythmia
Interpretation (8th ed.). Anatomy and Physiology of the Heart:
Heart Chambers.
6. Anatomy and Physiology of the Heart — Heart Chambers
Stem: A patient with chronic lung disease becomes increasingly
short of breath and develops pedal edema. The
echocardiogram shows increased pressure on the side of the
heart that sends blood to the lungs. Which chamber performs
that function?
A. Right ventricle
B. Left atrium
C. Right atrium
D. Left ventricle
Correct Answer: A
Rationale — Correct Answer: The right ventricle pumps
deoxygenated blood into the pulmonary artery and toward the
lungs. When pulmonary pressures rise, the right ventricle must
work harder, and signs of right-sided strain may appear.
Rationale — Incorrect Options:
B is incorrect because the left atrium receives oxygenated
blood from the lungs.
, C is incorrect because the right atrium receives venous return
but does not eject blood into the lungs.
D is incorrect because the left ventricle pumps to the systemic
circulation.
Teaching Point: The right ventricle pumps blood to the lungs.
Citation: Huff, J. (2022). ECG Workout: Exercises in Arrhythmia
Interpretation (8th ed.). Anatomy and Physiology of the Heart:
Heart Chambers.
7. Anatomy and Physiology of the Heart — Heart Chambers
Stem: A patient with atrial fibrillation reports palpitations and
fatigue. The echocardiogram shows poor filling of the chamber
that normally receives oxygenated blood from the lungs. Which
chamber is that?
A. Left atrium
B. Right atrium
C. Right ventricle
D. Aorta
Correct Answer: A
Rationale — Correct Answer: The left atrium receives
oxygenated blood from the pulmonary veins. Poor atrial
, function can reduce ventricular filling and contribute to
decreased cardiac output and fatigue.
Rationale — Incorrect Options:
B is incorrect because the right atrium receives deoxygenated
blood from the body.
C is incorrect because the right ventricle receives blood from
the right atrium.
D is incorrect because the aorta is a vessel, not a chamber.
Teaching Point: Pulmonary veins deliver oxygenated blood to
the left atrium.
Citation: Huff, J. (2022). ECG Workout: Exercises in Arrhythmia
Interpretation (8th ed.). Anatomy and Physiology of the Heart:
Heart Chambers.
8. Anatomy and Physiology of the Heart — Heart Chambers
Stem: A patient with long-standing hypertension becomes
short of breath with minimal activity and has left ventricular
hypertrophy on echocardiography. Which chamber must
generate the highest pressure to support normal circulation?
A. Left ventricle
B. Right atrium
EXERCISES IN ARRHYTHMIA
INTERPRETATION
8TH EDITION
AUTHOR(S)JANE HUFF
TEST BANK
1. Anatomy and Physiology of the Heart — Description and
Location
Stem: A 46-year-old woman reports chest tightness and
shortness of breath after climbing stairs. Her apical impulse is
palpated at the 5th intercostal space, left midclavicular line,
and heart sounds are heard best over the left lower sternal
border. Which statement best describes the normal location of
the heart?
A. The heart lies in the mediastinum between the lungs, slightly
left of midline.
,B. The heart is located within the left pleural cavity.
C. The heart sits primarily in the lower abdomen behind the
diaphragm.
D. The heart is centered equally in the right and left thorax.
Correct Answer: A
Rationale — Correct Answer: The heart is located in the
mediastinum, between the lungs, behind the sternum, and
slightly left of midline. This position explains why the apical
impulse is usually felt in the left 5th intercostal space and why
nurses auscultate heart sounds over standard chest landmarks.
Rationale — Incorrect Options:
B is incorrect because the heart is not inside the pleural cavity.
C is incorrect because the heart is above the diaphragm in the
thorax.
D is incorrect because the heart is not centered equally in the
thorax.
Teaching Point: The heart sits in the mediastinum, not inside
either lung space.
Citation: Huff, J. (2022). ECG Workout: Exercises in Arrhythmia
Interpretation (8th ed.). Anatomy and Physiology of the Heart:
Description and Location.
,2. Anatomy and Physiology of the Heart — Function of the
Heart
Stem: A 72-year-old patient with fatigue and cool extremities
has a blood pressure of 88/52 mm Hg and weak peripheral
pulses. The nurse explains why impaired cardiac performance
causes poor tissue perfusion. Which statement best reflects the
heart’s primary function?
A. To pump blood through the pulmonary and systemic
circulations
B. To store oxygen for use during exercise
C. To filter toxins from the blood
D. To produce red blood cells in response to hypoxia
Correct Answer: A
Rationale — Correct Answer: The heart’s main function is to
act as a pump that moves blood through the pulmonary circuit
to the lungs and the systemic circuit to the body. When
pumping ability decreases, perfusion and oxygen delivery
decline, leading to hypotension, cool skin, and fatigue.
Rationale — Incorrect Options:
B is incorrect because oxygen storage occurs in hemoglobin
and tissues, not the heart.
C is incorrect because toxin filtration is primarily a liver and
kidney function.
,D is incorrect because erythropoietin is produced mainly by the
kidneys.
Teaching Point: The heart pumps blood; it does not store
oxygen or filter toxins.
Citation: Huff, J. (2022). ECG Workout: Exercises in Arrhythmia
Interpretation (8th ed.). Anatomy and Physiology of the Heart:
Function of the Heart.
3. Anatomy and Physiology of the Heart — Heart Surfaces
Stem: A postoperative cardiac patient has mild chest
discomfort, and the nurse reviews normal cardiac anatomy
while correlating the point of maximal impulse. Which
description of the heart’s orientation is correct?
A. The apex points down and to the left, and the base lies
posteriorly.
B. The apex points toward the right shoulder, and the base lies
anteriorly.
C. The heart lies flat with no directional orientation.
D. The base points inferiorly toward the diaphragm.
Correct Answer: A
,Rationale — Correct Answer: The apex of the heart points
inferiorly and to the left, while the base is oriented posteriorly.
This orientation helps explain the typical location of the apical
impulse and the heart’s relationship to surrounding structures.
Rationale — Incorrect Options:
B is incorrect because the apex does not point to the right
shoulder.
C is incorrect because the heart has a consistent anatomic
orientation.
D is incorrect because the base is superior and posterior, not
inferior.
Teaching Point: The apex points left; the base is posterior.
Citation: Huff, J. (2022). ECG Workout: Exercises in Arrhythmia
Interpretation (8th ed.). Anatomy and Physiology of the Heart:
Heart Surfaces.
4. Anatomy and Physiology of the Heart — Structure of the
Heart Wall
Stem: A patient with crushing chest pain has elevated troponin
and a new drop in ejection fraction. The nurse knows the
damaged tissue is responsible for contraction. Which layer of
the heart wall is most affected?
,A. Myocardium
B. Endocardium
C. Epicardium only
D. Fibrous pericardium
Correct Answer: A
Rationale — Correct Answer: The myocardium is the muscular
middle layer of the heart wall and is responsible for contraction
and pumping. Myocardial ischemia or infarction weakens pump
function, which can reduce cardiac output and tissue perfusion.
Rationale — Incorrect Options:
B is incorrect because the endocardium lines the chambers and
valves.
C is incorrect because the epicardium is the outer layer and is
not the primary pumping layer.
D is incorrect because the fibrous pericardium is a protective
sac around the heart.
Teaching Point: Myocardial injury directly reduces the heart’s
pumping strength.
Citation: Huff, J. (2022). ECG Workout: Exercises in Arrhythmia
Interpretation (8th ed.). Anatomy and Physiology of the Heart:
Structure of the Heart Wall.
,5. Anatomy and Physiology of the Heart — Heart Chambers
Stem: A dehydrated patient arrives with dizziness, tachycardia,
and low central venous pressure. The nurse reviews how blood
returns to the heart before entering the right-sided pump.
Which chamber receives venous blood from the body first?
A. Right atrium
B. Left atrium
C. Right ventricle
D. Left ventricle
Correct Answer: A
Rationale — Correct Answer: The right atrium receives
deoxygenated blood returning from the body through the
superior and inferior vena cava. From there, blood moves
through the tricuspid valve into the right ventricle.
Rationale — Incorrect Options:
B is incorrect because the left atrium receives oxygenated
blood from the lungs.
C is incorrect because the right ventricle receives blood after
the right atrium.
D is incorrect because the left ventricle receives blood after the
left atrium.
Teaching Point: Venous blood enters the right atrium first.
,Citation: Huff, J. (2022). ECG Workout: Exercises in Arrhythmia
Interpretation (8th ed.). Anatomy and Physiology of the Heart:
Heart Chambers.
6. Anatomy and Physiology of the Heart — Heart Chambers
Stem: A patient with chronic lung disease becomes increasingly
short of breath and develops pedal edema. The
echocardiogram shows increased pressure on the side of the
heart that sends blood to the lungs. Which chamber performs
that function?
A. Right ventricle
B. Left atrium
C. Right atrium
D. Left ventricle
Correct Answer: A
Rationale — Correct Answer: The right ventricle pumps
deoxygenated blood into the pulmonary artery and toward the
lungs. When pulmonary pressures rise, the right ventricle must
work harder, and signs of right-sided strain may appear.
Rationale — Incorrect Options:
B is incorrect because the left atrium receives oxygenated
blood from the lungs.
, C is incorrect because the right atrium receives venous return
but does not eject blood into the lungs.
D is incorrect because the left ventricle pumps to the systemic
circulation.
Teaching Point: The right ventricle pumps blood to the lungs.
Citation: Huff, J. (2022). ECG Workout: Exercises in Arrhythmia
Interpretation (8th ed.). Anatomy and Physiology of the Heart:
Heart Chambers.
7. Anatomy and Physiology of the Heart — Heart Chambers
Stem: A patient with atrial fibrillation reports palpitations and
fatigue. The echocardiogram shows poor filling of the chamber
that normally receives oxygenated blood from the lungs. Which
chamber is that?
A. Left atrium
B. Right atrium
C. Right ventricle
D. Aorta
Correct Answer: A
Rationale — Correct Answer: The left atrium receives
oxygenated blood from the pulmonary veins. Poor atrial
, function can reduce ventricular filling and contribute to
decreased cardiac output and fatigue.
Rationale — Incorrect Options:
B is incorrect because the right atrium receives deoxygenated
blood from the body.
C is incorrect because the right ventricle receives blood from
the right atrium.
D is incorrect because the aorta is a vessel, not a chamber.
Teaching Point: Pulmonary veins deliver oxygenated blood to
the left atrium.
Citation: Huff, J. (2022). ECG Workout: Exercises in Arrhythmia
Interpretation (8th ed.). Anatomy and Physiology of the Heart:
Heart Chambers.
8. Anatomy and Physiology of the Heart — Heart Chambers
Stem: A patient with long-standing hypertension becomes
short of breath with minimal activity and has left ventricular
hypertrophy on echocardiography. Which chamber must
generate the highest pressure to support normal circulation?
A. Left ventricle
B. Right atrium
