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ECGS MADE EASY (AEHLERT) QUESTIONS WITH VERIFIED
ANSWERS DETAILED RATIONALES GRADED A+
ECGs Made Easy (Aehlert)
Questions 1–25: Anatomy & Physiology
1. A nurse is reviewing cardiac anatomy and must identify the chamber that
normally receives deoxygenated blood returning from the systemic circulation,
so which chamber correctly describes this structure?
A. Right atrium
B. Left atrium
C. Right ventricle
D. Left ventricle
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Answer: A. Rationale: The right atrium receives deoxygenated blood from the
superior vena cava, inferior vena cava, and coronary sinus.
2. A student is studying the anatomy of the heart and must identify which
structure forms the apex of the heart, so which of the following is correct?
A. Tip of the left ventricle
B. Tip of the right atrium
C. Right atrium and right ventricle
D. Left atrium and left ventricle
Answer: A. Rationale: The heart's apex, or lower portion, is formed by the tip of
the left ventricle, lying just above the diaphragm between the fifth and sixth ribs.
3. A nurse is reviewing the surfaces of the heart and must identify which
chamber forms the anterior surface, so which of the following is correct?
A. Left atrium
B. Right atrium
C. Left ventricle
D. Right ventricle
Answer: D. Rationale: The anterior surface of the heart lies behind the sternum
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and is formed by portions of the right atrium and left and right ventricles, but the
right ventricle is the area most directly behind the sternum.
4. A student is studying the vessels that enter and leave the heart and must
identify which vessel carries oxygenated blood from the lungs to the heart, so
which of the following is correct?
A. Pulmonary artery
B. Pulmonary veins
C. Superior vena cava
D. Inferior vena cava
Answer: B. Rationale: The left atrium receives freshly oxygenated blood from the
lungs via the right and left pulmonary veins.
5. A nurse is reviewing the cardiac valves and must identify the valve located
between the right atrium and right ventricle, so which of the following is
correct?
A. Mitral valve
B. Aortic valve
C. Pulmonary valve
D. Tricuspid valve
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Answer: D. Rationale: The tricuspid valve is located between the right atrium and
right ventricle, preventing backflow of blood.
6. A student is studying the anatomy of the heart and must identify which
chamber ejects blood directly into the pulmonary artery, so which of the
following is correct?
A. Right atrium
B. Right ventricle
C. Left atrium
D. Left ventricle
Answer: B. Rationale: The right ventricle ejects deoxygenated blood into the
pulmonary artery, which carries it to the lungs for oxygenation.
7. A nurse is reviewing cardiac physiology and must identify which layer of the
heart is responsible for the actual contraction, so which of the following is
correct?
A. Epicardium
B. Myocardium
C. Endocardium
D. Pericardium
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ECGS MADE EASY (AEHLERT) QUESTIONS WITH VERIFIED
ANSWERS DETAILED RATIONALES GRADED A+
ECGs Made Easy (Aehlert)
Questions 1–25: Anatomy & Physiology
1. A nurse is reviewing cardiac anatomy and must identify the chamber that
normally receives deoxygenated blood returning from the systemic circulation,
so which chamber correctly describes this structure?
A. Right atrium
B. Left atrium
C. Right ventricle
D. Left ventricle
1|Page
,Page 2 of 119
Answer: A. Rationale: The right atrium receives deoxygenated blood from the
superior vena cava, inferior vena cava, and coronary sinus.
2. A student is studying the anatomy of the heart and must identify which
structure forms the apex of the heart, so which of the following is correct?
A. Tip of the left ventricle
B. Tip of the right atrium
C. Right atrium and right ventricle
D. Left atrium and left ventricle
Answer: A. Rationale: The heart's apex, or lower portion, is formed by the tip of
the left ventricle, lying just above the diaphragm between the fifth and sixth ribs.
3. A nurse is reviewing the surfaces of the heart and must identify which
chamber forms the anterior surface, so which of the following is correct?
A. Left atrium
B. Right atrium
C. Left ventricle
D. Right ventricle
Answer: D. Rationale: The anterior surface of the heart lies behind the sternum
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and is formed by portions of the right atrium and left and right ventricles, but the
right ventricle is the area most directly behind the sternum.
4. A student is studying the vessels that enter and leave the heart and must
identify which vessel carries oxygenated blood from the lungs to the heart, so
which of the following is correct?
A. Pulmonary artery
B. Pulmonary veins
C. Superior vena cava
D. Inferior vena cava
Answer: B. Rationale: The left atrium receives freshly oxygenated blood from the
lungs via the right and left pulmonary veins.
5. A nurse is reviewing the cardiac valves and must identify the valve located
between the right atrium and right ventricle, so which of the following is
correct?
A. Mitral valve
B. Aortic valve
C. Pulmonary valve
D. Tricuspid valve
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Answer: D. Rationale: The tricuspid valve is located between the right atrium and
right ventricle, preventing backflow of blood.
6. A student is studying the anatomy of the heart and must identify which
chamber ejects blood directly into the pulmonary artery, so which of the
following is correct?
A. Right atrium
B. Right ventricle
C. Left atrium
D. Left ventricle
Answer: B. Rationale: The right ventricle ejects deoxygenated blood into the
pulmonary artery, which carries it to the lungs for oxygenation.
7. A nurse is reviewing cardiac physiology and must identify which layer of the
heart is responsible for the actual contraction, so which of the following is
correct?
A. Epicardium
B. Myocardium
C. Endocardium
D. Pericardium
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