ECG Workout
Exercises in Arrhythmia Interpretation
8th Edition
Author(s)Jane Huff
,Question 1
A telemetry nurse reviews a patient’s ECG and notes a normal
sinus rhythm with upright P waves preceding each QRS
complex. Which cardiac structure is responsible for preventing
backflow of blood from the left ventricle into the left atrium
during ventricular contraction?
A. Pulmonic valve
B. Tricuspid valve
C. Mitral valve
D. Aortic valve
Correct Answer: C
Rationale:
The mitral valve separates the left atrium from the left ventricle
and closes during ventricular contraction to prevent blood from
flowing backward into the left atrium. The ECG demonstrates
normal atrial depolarization and ventricular conduction but the
question focuses on valve function associated with normal
cardiac physiology. The pulmonic valve prevents backflow from
the pulmonary artery into the right ventricle. The tricuspid
valve separates the right atrium and right ventricle. The aortic
valve prevents blood from returning from the aorta into the left
ventricle.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
,Question 2
A patient’s ECG demonstrates a regular rhythm at 72 bpm with
consistent PR intervals and narrow QRS complexes. Blood
leaving the right ventricle first enters which structure?
A. Aorta
B. Pulmonary artery
C. Left atrium
D. Superior vena cava
Correct Answer: B
Rationale:
Blood leaving the right ventricle passes through the pulmonic
valve into the pulmonary artery before traveling to the lungs
for oxygenation. The ECG findings are consistent with effective
cardiac conduction and coordinated contraction. The aorta
receives blood from the left ventricle. The left atrium receives
oxygenated blood from the lungs. The superior vena cava
returns deoxygenated blood to the right atrium.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 3
An ECG rhythm strip demonstrates normal sinus rhythm with a
rate of 80 bpm. Which sequence correctly describes blood flow
through the heart after blood enters the right atrium?
, A. Right atrium → mitral valve → right ventricle → pulmonary
artery
B. Right atrium → tricuspid valve → right ventricle →
pulmonary artery
C. Right atrium → aortic valve → left ventricle → lungs
D. Right atrium → pulmonic valve → left atrium → pulmonary
vein
Correct Answer: B
Rationale:
Blood flows from the right atrium through the tricuspid valve
into the right ventricle and then into the pulmonary artery. The
ECG indicates coordinated electrical conduction supporting
effective mechanical contraction. The mitral valve is located on
the left side of the heart. The aortic valve directs blood into
systemic circulation. Pulmonary veins return oxygenated blood
from the lungs to the left atrium.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 4
A patient’s ECG shows a regular sinus rhythm with identifiable P
waves and normal QRS duration. Which vessel returns
oxygenated blood from the lungs to the heart?
A. Pulmonary artery
B. Inferior vena cava
Exercises in Arrhythmia Interpretation
8th Edition
Author(s)Jane Huff
,Question 1
A telemetry nurse reviews a patient’s ECG and notes a normal
sinus rhythm with upright P waves preceding each QRS
complex. Which cardiac structure is responsible for preventing
backflow of blood from the left ventricle into the left atrium
during ventricular contraction?
A. Pulmonic valve
B. Tricuspid valve
C. Mitral valve
D. Aortic valve
Correct Answer: C
Rationale:
The mitral valve separates the left atrium from the left ventricle
and closes during ventricular contraction to prevent blood from
flowing backward into the left atrium. The ECG demonstrates
normal atrial depolarization and ventricular conduction but the
question focuses on valve function associated with normal
cardiac physiology. The pulmonic valve prevents backflow from
the pulmonary artery into the right ventricle. The tricuspid
valve separates the right atrium and right ventricle. The aortic
valve prevents blood from returning from the aorta into the left
ventricle.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
,Question 2
A patient’s ECG demonstrates a regular rhythm at 72 bpm with
consistent PR intervals and narrow QRS complexes. Blood
leaving the right ventricle first enters which structure?
A. Aorta
B. Pulmonary artery
C. Left atrium
D. Superior vena cava
Correct Answer: B
Rationale:
Blood leaving the right ventricle passes through the pulmonic
valve into the pulmonary artery before traveling to the lungs
for oxygenation. The ECG findings are consistent with effective
cardiac conduction and coordinated contraction. The aorta
receives blood from the left ventricle. The left atrium receives
oxygenated blood from the lungs. The superior vena cava
returns deoxygenated blood to the right atrium.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 3
An ECG rhythm strip demonstrates normal sinus rhythm with a
rate of 80 bpm. Which sequence correctly describes blood flow
through the heart after blood enters the right atrium?
, A. Right atrium → mitral valve → right ventricle → pulmonary
artery
B. Right atrium → tricuspid valve → right ventricle →
pulmonary artery
C. Right atrium → aortic valve → left ventricle → lungs
D. Right atrium → pulmonic valve → left atrium → pulmonary
vein
Correct Answer: B
Rationale:
Blood flows from the right atrium through the tricuspid valve
into the right ventricle and then into the pulmonary artery. The
ECG indicates coordinated electrical conduction supporting
effective mechanical contraction. The mitral valve is located on
the left side of the heart. The aortic valve directs blood into
systemic circulation. Pulmonary veins return oxygenated blood
from the lungs to the left atrium.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 4
A patient’s ECG shows a regular sinus rhythm with identifiable P
waves and normal QRS duration. Which vessel returns
oxygenated blood from the lungs to the heart?
A. Pulmonary artery
B. Inferior vena cava
