ECG Workout
Exercises in Arrhythmia Interpretation
8th Edition
Author(s)Jane Huff
,Question 1
A telemetry student reviews a cardiac conduction diagram and
notes that electrical impulses normally originate from the
sinoatrial (SA) node before traveling through the atria. Which
structure is known as the heart’s primary pacemaker?
A. Atrioventricular (AV) node
B. Bundle branches
C. Sinoatrial (SA) node
D. Purkinje fibers
Correct Answer: C
Rationale:
The SA node is the normal pacemaker of the heart because it
initiates the electrical impulse that begins atrial depolarization.
The AV node delays conduction before impulses enter the
ventricles. Bundle branches and Purkinje fibers conduct
impulses through the ventricles but do not normally initiate the
heartbeat.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 2
A nurse reviewing cardiac anatomy identifies the valve located
,between the left atrium and left ventricle. Which valve is being
described?
A. Tricuspid valve
B. Pulmonic valve
C. Aortic valve
D. Mitral valve
Correct Answer: D
Rationale:
The mitral valve separates the left atrium from the left ventricle
and prevents backflow during ventricular contraction. The
tricuspid valve is located on the right side of the heart. The
pulmonic and aortic valves are semilunar valves located
between the ventricles and great vessels.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 3
A patient’s cardiovascular diagram shows deoxygenated blood
entering the heart through the vena cava. Which chamber
receives this blood first?
A. Left atrium
B. Left ventricle
C. Right atrium
D. Right ventricle
, Correct Answer: C
Rationale:
Deoxygenated blood from systemic circulation enters the right
atrium through the superior and inferior vena cava. Blood then
flows through the tricuspid valve into the right ventricle.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 4
A nursing student traces blood flow through the pulmonary
circulation. After blood leaves the right ventricle, where does it
travel next?
A. Aorta
B. Pulmonary artery
C. Pulmonary vein
D. Left atrium
Correct Answer: B
Rationale:
Blood leaves the right ventricle through the pulmonic valve into
the pulmonary artery, which carries deoxygenated blood to the
lungs for oxygenation. Pulmonary veins return oxygenated
blood to the left atrium.
Exercises in Arrhythmia Interpretation
8th Edition
Author(s)Jane Huff
,Question 1
A telemetry student reviews a cardiac conduction diagram and
notes that electrical impulses normally originate from the
sinoatrial (SA) node before traveling through the atria. Which
structure is known as the heart’s primary pacemaker?
A. Atrioventricular (AV) node
B. Bundle branches
C. Sinoatrial (SA) node
D. Purkinje fibers
Correct Answer: C
Rationale:
The SA node is the normal pacemaker of the heart because it
initiates the electrical impulse that begins atrial depolarization.
The AV node delays conduction before impulses enter the
ventricles. Bundle branches and Purkinje fibers conduct
impulses through the ventricles but do not normally initiate the
heartbeat.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 2
A nurse reviewing cardiac anatomy identifies the valve located
,between the left atrium and left ventricle. Which valve is being
described?
A. Tricuspid valve
B. Pulmonic valve
C. Aortic valve
D. Mitral valve
Correct Answer: D
Rationale:
The mitral valve separates the left atrium from the left ventricle
and prevents backflow during ventricular contraction. The
tricuspid valve is located on the right side of the heart. The
pulmonic and aortic valves are semilunar valves located
between the ventricles and great vessels.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 3
A patient’s cardiovascular diagram shows deoxygenated blood
entering the heart through the vena cava. Which chamber
receives this blood first?
A. Left atrium
B. Left ventricle
C. Right atrium
D. Right ventricle
, Correct Answer: C
Rationale:
Deoxygenated blood from systemic circulation enters the right
atrium through the superior and inferior vena cava. Blood then
flows through the tricuspid valve into the right ventricle.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 4
A nursing student traces blood flow through the pulmonary
circulation. After blood leaves the right ventricle, where does it
travel next?
A. Aorta
B. Pulmonary artery
C. Pulmonary vein
D. Left atrium
Correct Answer: B
Rationale:
Blood leaves the right ventricle through the pulmonic valve into
the pulmonary artery, which carries deoxygenated blood to the
lungs for oxygenation. Pulmonary veins return oxygenated
blood to the left atrium.
