Advent Health EKG Exam | Questions & Answers | Verified Study Guide | Latest 2026/2027 Edition | 100% Correct Solutions
OBJECTIVE ASSESSMENT - EXAM
Advent Health EKG Exam
Questions & Answers
Verified Study Guide
Latest 2026/2027 Edition
100% Correct Solutions
A+ Verified | 2026/2027 Edition | Passing Score: 80%
COVER PAGE - 1
,SECTIONS COVERED
Section 1: Basic Cardiac Electrophysiology and EKG Fundamentals
Section 2: Normal Sinus Rhythm and Sinus Dysrhythmias
Section 3: Atrial and Junctional Dysrhythmias
Section 4: Ventricular Dysrhythmias and AV Blocks
Section 5: Myocardial Ischemia, Injury, and Infarction
Section 1: Basic Cardiac Electrophysiology and EKG Fundamentals
Q1.
A nurse is reviewing the conduction system of the heart with a new graduate. The nurse explains that the sinoatrial (SA) node
is located in the upper portion of the right atrium and serves as the primary pacemaker of the heart. Under normal conditions,
what is the intrinsic firing rate of the SA node?
A. 40 to 60 beats per minute
B. 60 to 100 beats per minute
C. 20 to 40 beats per minute
D. 100 to 150 beats per minute
Correct Answer: A
The AV node normally fires at an intrinsic rate of 40 to 60 beats per minute when it assumes the pacemaker role. The SA node fires at
60 to 100 bpm as the primary pacemaker. The Purkinje fibers fire at 20 to 40 bpm. Atrial ectopic foci fire at 100 to 150 bpm, which is
faster than the SA node.
Q2.
A cardiac monitor technician observes a waveform on the EKG tracing that represents the depolarization of the ventricles. This
wave is the largest deflection on the standard EKG and should be primarily positive in lead II. Which EKG component is the
technician analyzing?
A. P wave
B. QRS complex
C. T wave
D. U wave
Correct Answer: B
The QRS complex represents ventricular depolarization and is the largest waveform on a standard EKG. The P wave represents atrial
depolarization, the T wave represents ventricular repolarization, and the U wave is an uncommon finding thought to represent Purkinje
fiber repolarization.
Q3.
During an EKG interpretation class, the instructor asks a student to identify the isoelectric line on a standard 12-lead EKG. The
student correctly identifies the baseline between waveforms as the isoelectric line and notes that it represents a specific
electrical state. Which of the following best describes what the isoelectric line represents?
A. Complete cardiac depolarization of all chambers
B. A period of no net electrical activity in the heart
C. Rapid repolarization of the atrial myocardium
D. Conduction delay at the bundle of His
Correct Answer: B
The isoelectric line (baseline) represents periods when there is no net electrical activity occurring in the heart, meaning depolarization
and repolarization forces are balanced. The PR segment and ST segment are normally isoelectric. Complete depolarization does not
produce a visible deflection on the EKG.
Advent Health EKG Exam | Questions & Answers | Verified Study Guide | Latest 202... Page 2
, Q4.
A critical care nurse is calibrating a cardiac monitor and needs to verify the standard paper speed and voltage calibration. The
nurse confirms the paper speed is set to 25 mm per second and checks the standardization mark. At this paper speed, how
many millimeters correspond to one second on the EKG grid?
A. 5 millimeters per second
B. 10 millimeters per second
C. 25 millimeters per second
D. 50 millimeters per second
Correct Answer: D
At the standard paper speed of 25 mm per second, each small box (1 mm) represents 0.04 seconds and each second of time spans 25
mm on the EKG grid. This calibration allows precise measurement of intervals and rates. The 25 mm/s speed is the universal standard
for diagnostic EKG interpretation.
Q5.
A nursing student is learning about the refractory periods of cardiac muscle cells. The clinical educator explains that during
one specific phase, the cardiac cell cannot be stimulated to depolarize again regardless of the strength of the stimulus. This
period corresponds to the plateau phase of the action potential and most of the QRS complex. Which refractory period is the
educator describing?
A. Relative refractory period
B. Supernormal period
C. Absolute refractory period
D. Vulnerable period
Correct Answer: C
The absolute refractory period is the time during which a cardiac cell cannot be stimulated to depolarize again no matter how strong the
stimulus. It corresponds to the plateau phase (phase 2) of the action potential and coincides with most of the QRS complex and early
portion of the ST segment, protecting the heart from tetany.
Q6.
An EKG technician is performing a 12-lead EKG on a patient and places the precordial lead V1 in the fourth intercostal space
at the right sternal border. The technician understands that the precordial leads provide a horizontal plane view of the heart.
Which other precordial lead is placed at the fifth intercostal space at the midclavicular line?
A. V2
B. V3
C. V4
D. V6
Correct Answer: C
V4 is placed in the fifth intercostal space at the midclavicular line. V2 is at the fourth intercostal space at the left sternal border, V3 is
halfway between V2 and V4, and V6 is placed at the fifth intercostal space at the midaxillary line.
Q7.
A telemetry nurse is analyzing an EKG rhythm strip and measures the distance of the PR interval. The nurse counts 4 small
boxes from the beginning of the P wave to the beginning of the QRS complex. The nurse knows that each small box equals
0.04 seconds at standard paper speed. What is the calculated PR interval, and is it within the normal range?
A. 0.12 seconds, which is below normal range
B. 0.16 seconds, which is within normal range
C. 0.20 seconds, which is within normal range
D. 0.28 seconds, which is above normal range
Correct Answer: D
The AV node normally fires at 40 to 60 bpm as the secondary pacemaker of the heart. The SA node fires at 60 to 100 bpm as the
primary pacemaker. When the SA node fails, the AV junction can take over at this slower rate. The Purkinje fibers fire even more slowly
at 20 to 40 bpm as the tertiary pacemaker.
Advent Health EKG Exam | Questions & Answers | Verified Study Guide | Latest 202... Page 3
OBJECTIVE ASSESSMENT - EXAM
Advent Health EKG Exam
Questions & Answers
Verified Study Guide
Latest 2026/2027 Edition
100% Correct Solutions
A+ Verified | 2026/2027 Edition | Passing Score: 80%
COVER PAGE - 1
,SECTIONS COVERED
Section 1: Basic Cardiac Electrophysiology and EKG Fundamentals
Section 2: Normal Sinus Rhythm and Sinus Dysrhythmias
Section 3: Atrial and Junctional Dysrhythmias
Section 4: Ventricular Dysrhythmias and AV Blocks
Section 5: Myocardial Ischemia, Injury, and Infarction
Section 1: Basic Cardiac Electrophysiology and EKG Fundamentals
Q1.
A nurse is reviewing the conduction system of the heart with a new graduate. The nurse explains that the sinoatrial (SA) node
is located in the upper portion of the right atrium and serves as the primary pacemaker of the heart. Under normal conditions,
what is the intrinsic firing rate of the SA node?
A. 40 to 60 beats per minute
B. 60 to 100 beats per minute
C. 20 to 40 beats per minute
D. 100 to 150 beats per minute
Correct Answer: A
The AV node normally fires at an intrinsic rate of 40 to 60 beats per minute when it assumes the pacemaker role. The SA node fires at
60 to 100 bpm as the primary pacemaker. The Purkinje fibers fire at 20 to 40 bpm. Atrial ectopic foci fire at 100 to 150 bpm, which is
faster than the SA node.
Q2.
A cardiac monitor technician observes a waveform on the EKG tracing that represents the depolarization of the ventricles. This
wave is the largest deflection on the standard EKG and should be primarily positive in lead II. Which EKG component is the
technician analyzing?
A. P wave
B. QRS complex
C. T wave
D. U wave
Correct Answer: B
The QRS complex represents ventricular depolarization and is the largest waveform on a standard EKG. The P wave represents atrial
depolarization, the T wave represents ventricular repolarization, and the U wave is an uncommon finding thought to represent Purkinje
fiber repolarization.
Q3.
During an EKG interpretation class, the instructor asks a student to identify the isoelectric line on a standard 12-lead EKG. The
student correctly identifies the baseline between waveforms as the isoelectric line and notes that it represents a specific
electrical state. Which of the following best describes what the isoelectric line represents?
A. Complete cardiac depolarization of all chambers
B. A period of no net electrical activity in the heart
C. Rapid repolarization of the atrial myocardium
D. Conduction delay at the bundle of His
Correct Answer: B
The isoelectric line (baseline) represents periods when there is no net electrical activity occurring in the heart, meaning depolarization
and repolarization forces are balanced. The PR segment and ST segment are normally isoelectric. Complete depolarization does not
produce a visible deflection on the EKG.
Advent Health EKG Exam | Questions & Answers | Verified Study Guide | Latest 202... Page 2
, Q4.
A critical care nurse is calibrating a cardiac monitor and needs to verify the standard paper speed and voltage calibration. The
nurse confirms the paper speed is set to 25 mm per second and checks the standardization mark. At this paper speed, how
many millimeters correspond to one second on the EKG grid?
A. 5 millimeters per second
B. 10 millimeters per second
C. 25 millimeters per second
D. 50 millimeters per second
Correct Answer: D
At the standard paper speed of 25 mm per second, each small box (1 mm) represents 0.04 seconds and each second of time spans 25
mm on the EKG grid. This calibration allows precise measurement of intervals and rates. The 25 mm/s speed is the universal standard
for diagnostic EKG interpretation.
Q5.
A nursing student is learning about the refractory periods of cardiac muscle cells. The clinical educator explains that during
one specific phase, the cardiac cell cannot be stimulated to depolarize again regardless of the strength of the stimulus. This
period corresponds to the plateau phase of the action potential and most of the QRS complex. Which refractory period is the
educator describing?
A. Relative refractory period
B. Supernormal period
C. Absolute refractory period
D. Vulnerable period
Correct Answer: C
The absolute refractory period is the time during which a cardiac cell cannot be stimulated to depolarize again no matter how strong the
stimulus. It corresponds to the plateau phase (phase 2) of the action potential and coincides with most of the QRS complex and early
portion of the ST segment, protecting the heart from tetany.
Q6.
An EKG technician is performing a 12-lead EKG on a patient and places the precordial lead V1 in the fourth intercostal space
at the right sternal border. The technician understands that the precordial leads provide a horizontal plane view of the heart.
Which other precordial lead is placed at the fifth intercostal space at the midclavicular line?
A. V2
B. V3
C. V4
D. V6
Correct Answer: C
V4 is placed in the fifth intercostal space at the midclavicular line. V2 is at the fourth intercostal space at the left sternal border, V3 is
halfway between V2 and V4, and V6 is placed at the fifth intercostal space at the midaxillary line.
Q7.
A telemetry nurse is analyzing an EKG rhythm strip and measures the distance of the PR interval. The nurse counts 4 small
boxes from the beginning of the P wave to the beginning of the QRS complex. The nurse knows that each small box equals
0.04 seconds at standard paper speed. What is the calculated PR interval, and is it within the normal range?
A. 0.12 seconds, which is below normal range
B. 0.16 seconds, which is within normal range
C. 0.20 seconds, which is within normal range
D. 0.28 seconds, which is above normal range
Correct Answer: D
The AV node normally fires at 40 to 60 bpm as the secondary pacemaker of the heart. The SA node fires at 60 to 100 bpm as the
primary pacemaker. When the SA node fails, the AV junction can take over at this slower rate. The Purkinje fibers fire even more slowly
at 20 to 40 bpm as the tertiary pacemaker.
Advent Health EKG Exam | Questions & Answers | Verified Study Guide | Latest 202... Page 3
