ECG Workout
Exercises in Arrhythmia Interpretation
8th Edition
Author(s)Jane Huff
,Question 1
A patient’s ECG monitor displays a normal sinus rhythm at 72
bpm. The nurse reviews cardiac anatomy and notes that blood
leaving the left ventricle enters which structure first?
A. Pulmonary artery
B. Aorta
C. Left atrium
D. Superior vena cava
Correct Answer: B
Rationale:
During ventricular systole, blood is ejected from the left
ventricle through the aortic valve into the aorta. The pulmonary
artery receives blood from the right ventricle. The left atrium
receives blood from the pulmonary veins. The superior vena
cava returns blood to the right atrium.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 2
A patient’s ECG shows a regular rhythm at 84 bpm. The nurse
correlates the ECG with blood flow and asks which valve opens
when blood moves from the right atrium to the right ventricle.
,A. Mitral valve
B. Pulmonic valve
C. Tricuspid valve
D. Aortic valve
Correct Answer: C
Rationale:
Blood flows from the right atrium to the right ventricle through
the tricuspid valve. The mitral valve is on the left side. The
pulmonic and aortic valves are semilunar valves leading out of
the ventricles.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 3
A patient’s ECG rhythm is sinus bradycardia at 56 bpm. The
nurse explains that oxygenated blood returning from the lungs
enters the heart through which chamber first?
A. Left atrium
B. Right atrium
C. Left ventricle
D. Right ventricle
Correct Answer: A
, Rationale:
Pulmonary veins return oxygenated blood from the lungs to the
left atrium. The right atrium receives systemic venous blood.
The ventricles receive blood after atrial contraction.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 4
A patient’s ECG shows a regular sinus rhythm at 68 bpm. Which
valve prevents backflow from the left ventricle into the left
atrium during ventricular contraction?
A. Tricuspid valve
B. Pulmonic valve
C. Mitral valve
D. Aortic valve
Correct Answer: C
Rationale:
The mitral valve lies between the left atrium and left ventricle
and prevents regurgitation during ventricular systole. The aortic
valve prevents return from the aorta.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Exercises in Arrhythmia Interpretation
8th Edition
Author(s)Jane Huff
,Question 1
A patient’s ECG monitor displays a normal sinus rhythm at 72
bpm. The nurse reviews cardiac anatomy and notes that blood
leaving the left ventricle enters which structure first?
A. Pulmonary artery
B. Aorta
C. Left atrium
D. Superior vena cava
Correct Answer: B
Rationale:
During ventricular systole, blood is ejected from the left
ventricle through the aortic valve into the aorta. The pulmonary
artery receives blood from the right ventricle. The left atrium
receives blood from the pulmonary veins. The superior vena
cava returns blood to the right atrium.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 2
A patient’s ECG shows a regular rhythm at 84 bpm. The nurse
correlates the ECG with blood flow and asks which valve opens
when blood moves from the right atrium to the right ventricle.
,A. Mitral valve
B. Pulmonic valve
C. Tricuspid valve
D. Aortic valve
Correct Answer: C
Rationale:
Blood flows from the right atrium to the right ventricle through
the tricuspid valve. The mitral valve is on the left side. The
pulmonic and aortic valves are semilunar valves leading out of
the ventricles.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 3
A patient’s ECG rhythm is sinus bradycardia at 56 bpm. The
nurse explains that oxygenated blood returning from the lungs
enters the heart through which chamber first?
A. Left atrium
B. Right atrium
C. Left ventricle
D. Right ventricle
Correct Answer: A
, Rationale:
Pulmonary veins return oxygenated blood from the lungs to the
left atrium. The right atrium receives systemic venous blood.
The ventricles receive blood after atrial contraction.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
Question 4
A patient’s ECG shows a regular sinus rhythm at 68 bpm. Which
valve prevents backflow from the left ventricle into the left
atrium during ventricular contraction?
A. Tricuspid valve
B. Pulmonic valve
C. Mitral valve
D. Aortic valve
Correct Answer: C
Rationale:
The mitral valve lies between the left atrium and left ventricle
and prevents regurgitation during ventricular systole. The aortic
valve prevents return from the aorta.
Source:
ECG Workout: Exercises in Arrhythmia Interpretation, 8th
Edition – Chapter 1
