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Advent Health EKG Cardiac Rhythm Interpretation
Complete Practice Assessment Actual Exam 2026/2027
Complete Exam-Style Questions with Detailed
Rationales | 100% Verified | Pass Guaranteed – A+
Graded
Part I: EKG Basics, Lead Placement & Cardiac Conduction (Questions 1–15)
Q1: A new telemetry nurse is reviewing the cardiac conduction pathway. In a normal heartbeat, which
structure serves as the primary pacemaker and initiates the electrical impulse?
A. The bundle of His
B. The atrioventricular (AV) node
C. The sinoatrial (SA) node [CORRECT]
D. The Purkinje fibers
Correct Answer: C
Rationale: The best answer is the sinoatrial node, which sits in the right atrium near the superior vena
cava and fires at 60–100 beats per minute under normal conditions. This aligns with Advent Health EKG
interpretation standards, where understanding the SA node as the heart's natural pacemaker is
foundational to recognizing when another site has taken over rhythm generation.
Q2: During a 12-lead EKG setup, a student nurse places the V1 electrode in the fourth intercostal space
at the right sternal border. Where should the V2 electrode be positioned?
A. Fourth intercostal space at the left mid-clavicular line
B. Fourth intercostal space at the left sternal border [CORRECT]
C. Fifth intercostal space at the left mid-axillary line
D. Fifth intercostal space at the left anterior axillary line
Correct Answer: B
Rationale: V2 belongs in the fourth intercostal space at the left sternal border, directly across from V1.
This matches the standard precordial lead placement taught in cardiac rhythm recognition, and placing
it correctly ensures accurate anterior wall ischemia detection.
Q3: A nurse is calculating the heart rate from a regular rhythm strip. There are approximately four large
boxes between consecutive R waves. What is the estimated ventricular rate?
,2
A. 100 beats per minute
B. 85 beats per minute
C. 75 beats per minute [CORRECT]
D. 60 beats per minute
Correct Answer: C
Rationale: Using the 300 method, dividing 300 by the number of large boxes between R waves gives the
rate—so 300 ÷ 4 = 75 bpm. This is a quick, reliable calculation method that every telemetry nurse should
have memorized for rapid rhythm assessment at the bedside.
Q4: A patient has an EKG showing a PR interval that measures 0.24 seconds. The QRS duration is 0.08
seconds, and the rhythm is regular with a P wave before every QRS. Which statement best describes this
finding?
A. This is a normal PR interval and requires no further action
B. This represents a first-degree AV block [CORRECT]
C. This indicates a second-degree AV block Type I
D. This suggests the patient is experiencing an acute myocardial infarction
Correct Answer: B
Rationale: A PR interval greater than 0.20 seconds with a consistent 1:1 relationship between P waves
and QRS complexes defines first-degree AV block. This aligns with Advent Health EKG interpretation
standards, where any PR interval exceeding five small boxes warrants documentation and monitoring
even if the patient is asymptomatic.
Q5: On a standard EKG, each small box horizontally represents how much time?
A. 0.02 seconds
B. 0.04 seconds [CORRECT]
C. 0.10 seconds
D. 0.20 seconds
Correct Answer: B
Rationale: Each small box on EKG paper represents 0.04 seconds, while each large box (five small boxes)
represents 0.20 seconds. This measurement is critical for accurate interval and segment analysis, and
getting it wrong can lead to misidentification of prolonged QT or widened QRS complexes.
Q6: A nurse notices that lead I shows a predominantly positive QRS complex, while lead aVF shows a
predominantly negative QRS complex. What does this suggest about the electrical axis of the heart?
A. Normal axis
, 3
B. Left axis deviation [CORRECT]
C. Right axis deviation
D. Extreme axis deviation
Correct Answer: B
Rationale: When lead I is positive and aVF is negative, the electrical axis falls between −30° and −90°,
indicating left axis deviation. This is a straightforward quadrant method for axis determination that
helps clinicians quickly screen for conditions like left anterior fascicular block or inferior wall changes.
Q7: During a code blue, the team leader asks a nurse to confirm whether the patient is in asystole. The
monitor shows a flat line with no discernible electrical activity. Before declaring asystole, what is the
most important step the nurse should take?
A. Immediately begin transcutaneous pacing
B. Check the leads, gain settings, and ensure the patient is not disconnected [CORRECT]
C. Administer atropine 1 mg IV push
D. Deliver a precordial thump and reassess
Correct Answer: B
Rationale: The best answer is to verify lead placement, increase the gain, and check for patient
disconnection because a flat line can be artifact from a loose electrode or disconnected cable. This
matches the cardiac rhythm criteria that asystole must be confirmed in more than one lead before
treatment decisions are made, preventing unnecessary and potentially harmful interventions.
Q8: A telemetry tech calls you to the monitor station because a patient's rhythm strip shows a QRS
complex that is 0.14 seconds wide with an RSR' pattern in lead V1 and a wide, slurred S wave in lead V6.
Which conduction abnormality is most likely present?
A. Left bundle branch block
B. Right bundle branch block [CORRECT]
C. Left anterior fascicular block
D. First-degree AV block
Correct Answer: B
Rationale: The RSR' pattern in V1 with a wide terminal S wave in V6 is the classic morphology for right
bundle branch block, where delayed right ventricular depolarization produces that characteristic "bunny
ear" appearance. This aligns with Advent Health EKG interpretation standards for bundle branch block
identification using precordial lead analysis.
Q9: A nursing student asks you to explain the significance of the QT interval. Which response best
describes what the QT interval represents?
Advent Health EKG Cardiac Rhythm Interpretation
Complete Practice Assessment Actual Exam 2026/2027
Complete Exam-Style Questions with Detailed
Rationales | 100% Verified | Pass Guaranteed – A+
Graded
Part I: EKG Basics, Lead Placement & Cardiac Conduction (Questions 1–15)
Q1: A new telemetry nurse is reviewing the cardiac conduction pathway. In a normal heartbeat, which
structure serves as the primary pacemaker and initiates the electrical impulse?
A. The bundle of His
B. The atrioventricular (AV) node
C. The sinoatrial (SA) node [CORRECT]
D. The Purkinje fibers
Correct Answer: C
Rationale: The best answer is the sinoatrial node, which sits in the right atrium near the superior vena
cava and fires at 60–100 beats per minute under normal conditions. This aligns with Advent Health EKG
interpretation standards, where understanding the SA node as the heart's natural pacemaker is
foundational to recognizing when another site has taken over rhythm generation.
Q2: During a 12-lead EKG setup, a student nurse places the V1 electrode in the fourth intercostal space
at the right sternal border. Where should the V2 electrode be positioned?
A. Fourth intercostal space at the left mid-clavicular line
B. Fourth intercostal space at the left sternal border [CORRECT]
C. Fifth intercostal space at the left mid-axillary line
D. Fifth intercostal space at the left anterior axillary line
Correct Answer: B
Rationale: V2 belongs in the fourth intercostal space at the left sternal border, directly across from V1.
This matches the standard precordial lead placement taught in cardiac rhythm recognition, and placing
it correctly ensures accurate anterior wall ischemia detection.
Q3: A nurse is calculating the heart rate from a regular rhythm strip. There are approximately four large
boxes between consecutive R waves. What is the estimated ventricular rate?
,2
A. 100 beats per minute
B. 85 beats per minute
C. 75 beats per minute [CORRECT]
D. 60 beats per minute
Correct Answer: C
Rationale: Using the 300 method, dividing 300 by the number of large boxes between R waves gives the
rate—so 300 ÷ 4 = 75 bpm. This is a quick, reliable calculation method that every telemetry nurse should
have memorized for rapid rhythm assessment at the bedside.
Q4: A patient has an EKG showing a PR interval that measures 0.24 seconds. The QRS duration is 0.08
seconds, and the rhythm is regular with a P wave before every QRS. Which statement best describes this
finding?
A. This is a normal PR interval and requires no further action
B. This represents a first-degree AV block [CORRECT]
C. This indicates a second-degree AV block Type I
D. This suggests the patient is experiencing an acute myocardial infarction
Correct Answer: B
Rationale: A PR interval greater than 0.20 seconds with a consistent 1:1 relationship between P waves
and QRS complexes defines first-degree AV block. This aligns with Advent Health EKG interpretation
standards, where any PR interval exceeding five small boxes warrants documentation and monitoring
even if the patient is asymptomatic.
Q5: On a standard EKG, each small box horizontally represents how much time?
A. 0.02 seconds
B. 0.04 seconds [CORRECT]
C. 0.10 seconds
D. 0.20 seconds
Correct Answer: B
Rationale: Each small box on EKG paper represents 0.04 seconds, while each large box (five small boxes)
represents 0.20 seconds. This measurement is critical for accurate interval and segment analysis, and
getting it wrong can lead to misidentification of prolonged QT or widened QRS complexes.
Q6: A nurse notices that lead I shows a predominantly positive QRS complex, while lead aVF shows a
predominantly negative QRS complex. What does this suggest about the electrical axis of the heart?
A. Normal axis
, 3
B. Left axis deviation [CORRECT]
C. Right axis deviation
D. Extreme axis deviation
Correct Answer: B
Rationale: When lead I is positive and aVF is negative, the electrical axis falls between −30° and −90°,
indicating left axis deviation. This is a straightforward quadrant method for axis determination that
helps clinicians quickly screen for conditions like left anterior fascicular block or inferior wall changes.
Q7: During a code blue, the team leader asks a nurse to confirm whether the patient is in asystole. The
monitor shows a flat line with no discernible electrical activity. Before declaring asystole, what is the
most important step the nurse should take?
A. Immediately begin transcutaneous pacing
B. Check the leads, gain settings, and ensure the patient is not disconnected [CORRECT]
C. Administer atropine 1 mg IV push
D. Deliver a precordial thump and reassess
Correct Answer: B
Rationale: The best answer is to verify lead placement, increase the gain, and check for patient
disconnection because a flat line can be artifact from a loose electrode or disconnected cable. This
matches the cardiac rhythm criteria that asystole must be confirmed in more than one lead before
treatment decisions are made, preventing unnecessary and potentially harmful interventions.
Q8: A telemetry tech calls you to the monitor station because a patient's rhythm strip shows a QRS
complex that is 0.14 seconds wide with an RSR' pattern in lead V1 and a wide, slurred S wave in lead V6.
Which conduction abnormality is most likely present?
A. Left bundle branch block
B. Right bundle branch block [CORRECT]
C. Left anterior fascicular block
D. First-degree AV block
Correct Answer: B
Rationale: The RSR' pattern in V1 with a wide terminal S wave in V6 is the classic morphology for right
bundle branch block, where delayed right ventricular depolarization produces that characteristic "bunny
ear" appearance. This aligns with Advent Health EKG interpretation standards for bundle branch block
identification using precordial lead analysis.
Q9: A nursing student asks you to explain the significance of the QT interval. Which response best
describes what the QT interval represents?
