Relias Dysrhythmia Basic A Exam 2026/2027: Questions & Verified Answers | EKG Rhythm Identification, ECG Interpretation (Graded A+ Solution) 2026/2027
OBJECTIVE ASSESSMENT - EXAM
Relias Dysrhythmia Basic A Exam 2026/2027: Questions & Verified
Answers | EKG Rhythm Identification, ECG Interpretation (Graded A+
Solution) 2026/2027
75 100%
QUESTIONS VERIFIED ANSWERS EDITION
TOPICS COVERED
Cardiac Anatomy & Physiology Atrial & Ventricular Dysrhythmias
ECG Rhythm Interpretation Conduction Blocks & Pacing
Normal Sinus Rhythm & Variations Emergency Cardiac Management
COVER PAGE - 1
,SECTION 1 | CARDIAC ANATOMY & PHYSIOLOGY | Q1-Q15 | Relias Dysrhythmia Basic A Exam 2026/2027: Questions & Verified Answers | EKG Rhythm Identification, ECG Interpretation (Graded
Q1 Question 1 of 75
A nurse educator is teaching a new graduate about the heart's conduction system and explains that the
sinoatrial node is the primary pacemaker. Where is the SA node located within the heart?
A. Lower left ventricle near the apex
B. Interatrial septum near the coronary sinus
C. Upper left atrium near the pulmonary veins
D. Upper right atrium near the superior vena cava opening
Correct Answer: D
Rationale:
The sinoatrial node is located in the upper right atrium near the opening of the superior vena cava. It
normally fires at 60 to 100 beats per minute, making it the heart's dominant pacemaker.
Q2 Question 2 of 75
A cardiology fellow asks which anatomic structure delays the electrical impulse between the atria and
ventricles, allowing time for ventricular filling. Which structure performs this function?
A. Bundle of His
B. Purkinje fibers
C. Atrioventricular node
D. Sinoatrial node
Correct Answer: C
Rationale:
The atrioventricular node located in the lower right atrium delays the impulse approximately 0.1 seconds,
allowing the atria to complete contraction and the ventricles to fill before they contract.
Relias Dysrhythmia Basic A Exam 2026/2027: Questions & Verified Answers | EKG Rhythm Identification, ECG Interpretation (Graded A+ Solution) 2026/2027 - 2026/2027 | Passing Score: 80% | Page 2 of 38
,SECTION 1 | CARDIAC ANATOMY & PHYSIOLOGY | Q1-Q15 | Relias Dysrhythmia Basic A Exam 2026/2027: Questions & Verified Answers | EKG Rhythm Identification, ECG Interpretation (Graded
Q3 Question 3 of 75
A medical student is learning about the intrinsic firing rates of cardiac pacemaker cells. What is the
intrinsic rate of the atrioventricular junction?
A. 60 to 100 beats per minute
B. 40 to 60 beats per minute
C. 20 to 40 beats per minute
D. 100 to 150 beats per minute
Correct Answer: B
Rationale:
The AV junction has an intrinsic firing rate of 40 to 60 beats per minute. It takes over as pacemaker when the
SA node fails, producing a junctional escape rhythm.
Q4 Question 4 of 75
A nursing instructor quizzes students on Purkinje fiber intrinsic rates. The Purkinje fibers serve as a
backup pacemaker when higher pacemakers fail. What is their intrinsic rate?
A. 20 to 40 beats per minute
B. 60 to 100 beats per minute
C. 40 to 60 beats per minute
D. 100 to 150 beats per minute
Correct Answer: A
Rationale:
The Purkinje fibers have an intrinsic rate of 20 to 40 beats per minute. When the SA node and AV junction
both fail, the Purkinje fibers produce a ventricular escape rhythm.
Relias Dysrhythmia Basic A Exam 2026/2027: Questions & Verified Answers | EKG Rhythm Identification, ECG Interpretation (Graded A+ Solution) 2026/2027 - 2026/2027 | Passing Score: 80% | Page 3 of 38
, SECTION 1 | CARDIAC ANATOMY & PHYSIOLOGY | Q1-Q15 | Relias Dysrhythmia Basic A Exam 2026/2027: Questions & Verified Answers | EKG Rhythm Identification, ECG Interpretation (Graded
Q5 Question 5 of 75
A patient's ECG shows a prolonged PR interval. The nurse understands this represents delayed
conduction through which structure?
A. Atrioventricular node
B. Bundle branches
C. Purkinje fibers
D. Sinoatrial node
Correct Answer: A
Rationale:
The PR interval represents the time from atrial depolarization to ventricular depolarization, primarily reflecting
conduction through the AV node. Prolongation indicates AV node delay, characteristic of first-degree AV
block.
Q6 Question 6 of 75
A patient in the cardiac ICU has an arterial blood pressure of 120/80 mmHg. The nurse understands
that the systolic pressure represents which physiologic event?
A. Atrial contraction
B. Ventricular contraction and ejection
C. Ventricular relaxation and filling
D. Closure of the mitral valve
Correct Answer: B
Rationale:
The systolic pressure reflects ventricular contraction and ejection of blood into the aorta. The diastolic
pressure represents ventricular relaxation and filling, when the aortic valve closes.
Relias Dysrhythmia Basic A Exam 2026/2027: Questions & Verified Answers | EKG Rhythm Identification, ECG Interpretation (Graded A+ Solution) 2026/2027 - 2026/2027 | Passing Score: 80% | Page 4 of 38
OBJECTIVE ASSESSMENT - EXAM
Relias Dysrhythmia Basic A Exam 2026/2027: Questions & Verified
Answers | EKG Rhythm Identification, ECG Interpretation (Graded A+
Solution) 2026/2027
75 100%
QUESTIONS VERIFIED ANSWERS EDITION
TOPICS COVERED
Cardiac Anatomy & Physiology Atrial & Ventricular Dysrhythmias
ECG Rhythm Interpretation Conduction Blocks & Pacing
Normal Sinus Rhythm & Variations Emergency Cardiac Management
COVER PAGE - 1
,SECTION 1 | CARDIAC ANATOMY & PHYSIOLOGY | Q1-Q15 | Relias Dysrhythmia Basic A Exam 2026/2027: Questions & Verified Answers | EKG Rhythm Identification, ECG Interpretation (Graded
Q1 Question 1 of 75
A nurse educator is teaching a new graduate about the heart's conduction system and explains that the
sinoatrial node is the primary pacemaker. Where is the SA node located within the heart?
A. Lower left ventricle near the apex
B. Interatrial septum near the coronary sinus
C. Upper left atrium near the pulmonary veins
D. Upper right atrium near the superior vena cava opening
Correct Answer: D
Rationale:
The sinoatrial node is located in the upper right atrium near the opening of the superior vena cava. It
normally fires at 60 to 100 beats per minute, making it the heart's dominant pacemaker.
Q2 Question 2 of 75
A cardiology fellow asks which anatomic structure delays the electrical impulse between the atria and
ventricles, allowing time for ventricular filling. Which structure performs this function?
A. Bundle of His
B. Purkinje fibers
C. Atrioventricular node
D. Sinoatrial node
Correct Answer: C
Rationale:
The atrioventricular node located in the lower right atrium delays the impulse approximately 0.1 seconds,
allowing the atria to complete contraction and the ventricles to fill before they contract.
Relias Dysrhythmia Basic A Exam 2026/2027: Questions & Verified Answers | EKG Rhythm Identification, ECG Interpretation (Graded A+ Solution) 2026/2027 - 2026/2027 | Passing Score: 80% | Page 2 of 38
,SECTION 1 | CARDIAC ANATOMY & PHYSIOLOGY | Q1-Q15 | Relias Dysrhythmia Basic A Exam 2026/2027: Questions & Verified Answers | EKG Rhythm Identification, ECG Interpretation (Graded
Q3 Question 3 of 75
A medical student is learning about the intrinsic firing rates of cardiac pacemaker cells. What is the
intrinsic rate of the atrioventricular junction?
A. 60 to 100 beats per minute
B. 40 to 60 beats per minute
C. 20 to 40 beats per minute
D. 100 to 150 beats per minute
Correct Answer: B
Rationale:
The AV junction has an intrinsic firing rate of 40 to 60 beats per minute. It takes over as pacemaker when the
SA node fails, producing a junctional escape rhythm.
Q4 Question 4 of 75
A nursing instructor quizzes students on Purkinje fiber intrinsic rates. The Purkinje fibers serve as a
backup pacemaker when higher pacemakers fail. What is their intrinsic rate?
A. 20 to 40 beats per minute
B. 60 to 100 beats per minute
C. 40 to 60 beats per minute
D. 100 to 150 beats per minute
Correct Answer: A
Rationale:
The Purkinje fibers have an intrinsic rate of 20 to 40 beats per minute. When the SA node and AV junction
both fail, the Purkinje fibers produce a ventricular escape rhythm.
Relias Dysrhythmia Basic A Exam 2026/2027: Questions & Verified Answers | EKG Rhythm Identification, ECG Interpretation (Graded A+ Solution) 2026/2027 - 2026/2027 | Passing Score: 80% | Page 3 of 38
, SECTION 1 | CARDIAC ANATOMY & PHYSIOLOGY | Q1-Q15 | Relias Dysrhythmia Basic A Exam 2026/2027: Questions & Verified Answers | EKG Rhythm Identification, ECG Interpretation (Graded
Q5 Question 5 of 75
A patient's ECG shows a prolonged PR interval. The nurse understands this represents delayed
conduction through which structure?
A. Atrioventricular node
B. Bundle branches
C. Purkinje fibers
D. Sinoatrial node
Correct Answer: A
Rationale:
The PR interval represents the time from atrial depolarization to ventricular depolarization, primarily reflecting
conduction through the AV node. Prolongation indicates AV node delay, characteristic of first-degree AV
block.
Q6 Question 6 of 75
A patient in the cardiac ICU has an arterial blood pressure of 120/80 mmHg. The nurse understands
that the systolic pressure represents which physiologic event?
A. Atrial contraction
B. Ventricular contraction and ejection
C. Ventricular relaxation and filling
D. Closure of the mitral valve
Correct Answer: B
Rationale:
The systolic pressure reflects ventricular contraction and ejection of blood into the aorta. The diastolic
pressure represents ventricular relaxation and filling, when the aortic valve closes.
Relias Dysrhythmia Basic A Exam 2026/2027: Questions & Verified Answers | EKG Rhythm Identification, ECG Interpretation (Graded A+ Solution) 2026/2027 - 2026/2027 | Passing Score: 80% | Page 4 of 38
