The Ultimate and Most Comprehensive Medical-Surgical Telemetry Study
Guide 2025, Covering Cardiac Monitoring and ECG Rhythm Interpretation,
Telemetry Equipment and Alarm Management, Medical-Surgical Nursing
Concepts, Patient Assessment and Monitoring, Atrial and Ventricular
Dysrhythmias, Heart Blocks and Conduction Disorders, Pharmacology for
Cardiac Patients, Nursing Interventions and Patient Safety, Clinical
Decision-Making, Evidence-Based Practice, Practice Questions with Verified
Answers and Detailed Rationales, Real Clinical Scenarios, Step-by-Step
Telemetry Interpretation Techniques, and Proven Strategies to Successfully
Pass Medical-Surgical Telemetry Exams and Excel in Clinical Practice
Question 1: Which ECG waveform represents ventricular depolarization?
A. P wave
B. QRS complex
C. T wave
D. U wave
CORRECT ANSWER: B. QRS complex
RATIONALE: The QRS complex on an electrocardiogram represents the electrical depolarization
of the ventricles, which triggers ventricular contraction. The P wave represents atrial
depolarization, the T wave represents ventricular repolarization, and the U wave, when present,
is thought to represent repolarization of the Purkinje fibers or late ventricular repolarization.
Question 2: A telemetry patient develops a heart rate of 48 bpm with regular P waves
preceding each QRS complex and a PR interval of 0.20 seconds. This rhythm is best described
as:
A. Sinus bradycardia
B. First-degree AV block
C. Junctional rhythm
D. Sinus arrhythmia
CORRECT ANSWER: A. Sinus bradycardia
RATIONALE: Sinus bradycardia is characterized by a regular rhythm with a heart rate less than
60 bpm, normal P waves preceding each QRS complex, and a normal PR interval (0.12-0.20
seconds). First-degree AV block would show a prolonged PR interval (>0.20 seconds), junctional
rhythm typically lacks preceding P waves or has inverted P waves, and sinus arrhythmia shows
irregularity related to respiration.
,Question 3: When prioritizing care for a telemetry patient, which finding requires immediate
nursing intervention?
A. Occasional premature atrial contractions
B. New-onset ST-segment elevation in leads II, III, and aVF
C. Sinus rhythm with a heart rate of 98 bpm
D. First-degree AV block with a PR interval of 0.22 seconds
CORRECT ANSWER: B. New-onset ST-segment elevation in leads II, III, and aVF
RATIONALE: ST-segment elevation in leads II, III, and aVF indicates an acute inferior wall
myocardial infarction, which is a medical emergency requiring immediate intervention such as
activation of the cardiac catheterization team, administration of aspirin, and preparation for
reperfusion therapy. The other findings, while requiring monitoring, are not immediately life-
threatening.
Question 4: Which electrolyte imbalance is most commonly associated with the development
of peaked T waves on telemetry monitoring?
A. Hypokalemia
B. Hyperkalemia
C. Hypocalcemia
D. Hypernatremia
CORRECT ANSWER: B. Hyperkalemia
RATIONALE: Hyperkalemia causes characteristic ECG changes including peaked, narrow-based T
waves, which may progress to widened QRS complexes, loss of P waves, and ultimately a sine
wave pattern as potassium levels rise. Hypokalemia typically causes flattened T waves and U
waves, hypocalcemia prolongs the QT interval, and hypernatremia does not have specific direct
ECG manifestations.
Question 5: A patient on telemetry monitoring has a pacemaker. Which ECG finding indicates
appropriate pacemaker function?
A. Absence of P waves with irregular QRS complexes
B. A pacing spike followed by a P wave or QRS complex
C. Consistent PR interval prolongation
D. Wide QRS complexes without pacing spikes
CORRECT ANSWER: B. A pacing spike followed by a P wave or QRS complex
RATIONALE: Appropriate pacemaker function is evidenced by a pacing spike (a sharp vertical
deflection) followed by capture, which appears as a P wave for atrial pacing or a QRS complex
,for ventricular pacing. This indicates the electrical impulse from the pacemaker successfully
depolarized the cardiac tissue. The other options suggest pacemaker malfunction or unrelated
rhythm disturbances.
Question 6: Which action should the nurse take FIRST when a telemetry alarm indicates
asystole?
A. Begin chest compressions immediately
B. Verify the rhythm by checking the patient and leads
C. Administer epinephrine 1 mg IV push
D. Call a rapid response team
CORRECT ANSWER: B. Verify the rhythm by checking the patient and leads
RATIONALE: Before initiating advanced cardiac life support interventions for asystole, the nurse
must first verify that the rhythm is genuine and not an artifact caused by loose leads, patient
movement, or equipment malfunction. This involves assessing the patient's pulse, breathing,
and level of consciousness while checking electrode placement and lead connections. If asystole
is confirmed, then chest compressions and activation of the emergency response team should
follow immediately.
Question 7: A patient receiving IV amiodarone for atrial fibrillation with rapid ventricular
response develops a heart rate of 38 bpm on telemetry. The nurse should anticipate
administering which medication?
A. Atropine
B. Adenosine
C. Lidocaine
D. Diltiazem
CORRECT ANSWER: A. Atropine
RATIONALE: Amiodarone can cause bradycardia as a side effect. Symptomatic bradycardia
(heart rate <40-50 bpm with signs of poor perfusion) is initially treated with atropine 0.5 mg IV
push, which may be repeated every 3-5 minutes up to a total dose of 3 mg. Adenosine is used
for terminating supraventricular tachycardias, lidocaine for ventricular arrhythmias, and
diltiazem would worsen bradycardia.
Question 8: Which telemetry lead placement is optimal for monitoring atrial activity and
detecting atrial arrhythmias?
A. Lead II
B. Lead V1
, C. Lead aVR
D. Lead III
CORRECT ANSWER: B. Lead V1
RATIONALE: Lead V1 is positioned in the fourth intercostal space at the right sternal border and
provides the best visualization of atrial activity, including P wave morphology, making it ideal for
detecting atrial arrhythmias such as atrial fibrillation, atrial flutter, and premature atrial
contractions. Lead II is commonly used for general monitoring but is less specific for atrial
activity.
Question 9: A telemetry patient reports chest pain. The nurse notes ST-segment depression in
leads V4-V6. This finding is most suggestive of:
A. Pericarditis
B. Myocardial ischemia
C. Left ventricular hypertrophy
D. Early repolarization
CORRECT ANSWER: B. Myocardial ischemia
RATIONALE: ST-segment depression, particularly in contiguous leads such as V4-V6, is a classic
ECG indicator of myocardial ischemia, representing subendocardial injury due to inadequate
oxygen supply. Pericarditis typically causes diffuse ST-segment elevation with PR depression, left
ventricular hypertrophy shows increased voltage criteria with possible ST-T changes, and early
repolarization features J-point elevation with concave ST segments.
Question 10: Which statement by a new graduate nurse indicates understanding of telemetry
alarm management?
A. "I can silence alarms if they are frequent but the patient seems stable."
B. "I should assess the patient first before responding to any telemetry alarm."
C. "Alarms can be delayed by 30 seconds to reduce noise on the unit."
D. "Only the charge nurse should respond to life-threatening arrhythmia alarms."
CORRECT ANSWER: B. I should assess the patient first before responding to any telemetry
alarm.
RATIONALE: Patient assessment is the priority when any telemetry alarm activates to determine
if the rhythm change is real or artifact and to evaluate the patient's clinical status. Silencing
alarms without assessment, delaying alarms, or restricting response to certain staff members
compromises patient safety and violates standards of telemetry monitoring practice.
Guide 2025, Covering Cardiac Monitoring and ECG Rhythm Interpretation,
Telemetry Equipment and Alarm Management, Medical-Surgical Nursing
Concepts, Patient Assessment and Monitoring, Atrial and Ventricular
Dysrhythmias, Heart Blocks and Conduction Disorders, Pharmacology for
Cardiac Patients, Nursing Interventions and Patient Safety, Clinical
Decision-Making, Evidence-Based Practice, Practice Questions with Verified
Answers and Detailed Rationales, Real Clinical Scenarios, Step-by-Step
Telemetry Interpretation Techniques, and Proven Strategies to Successfully
Pass Medical-Surgical Telemetry Exams and Excel in Clinical Practice
Question 1: Which ECG waveform represents ventricular depolarization?
A. P wave
B. QRS complex
C. T wave
D. U wave
CORRECT ANSWER: B. QRS complex
RATIONALE: The QRS complex on an electrocardiogram represents the electrical depolarization
of the ventricles, which triggers ventricular contraction. The P wave represents atrial
depolarization, the T wave represents ventricular repolarization, and the U wave, when present,
is thought to represent repolarization of the Purkinje fibers or late ventricular repolarization.
Question 2: A telemetry patient develops a heart rate of 48 bpm with regular P waves
preceding each QRS complex and a PR interval of 0.20 seconds. This rhythm is best described
as:
A. Sinus bradycardia
B. First-degree AV block
C. Junctional rhythm
D. Sinus arrhythmia
CORRECT ANSWER: A. Sinus bradycardia
RATIONALE: Sinus bradycardia is characterized by a regular rhythm with a heart rate less than
60 bpm, normal P waves preceding each QRS complex, and a normal PR interval (0.12-0.20
seconds). First-degree AV block would show a prolonged PR interval (>0.20 seconds), junctional
rhythm typically lacks preceding P waves or has inverted P waves, and sinus arrhythmia shows
irregularity related to respiration.
,Question 3: When prioritizing care for a telemetry patient, which finding requires immediate
nursing intervention?
A. Occasional premature atrial contractions
B. New-onset ST-segment elevation in leads II, III, and aVF
C. Sinus rhythm with a heart rate of 98 bpm
D. First-degree AV block with a PR interval of 0.22 seconds
CORRECT ANSWER: B. New-onset ST-segment elevation in leads II, III, and aVF
RATIONALE: ST-segment elevation in leads II, III, and aVF indicates an acute inferior wall
myocardial infarction, which is a medical emergency requiring immediate intervention such as
activation of the cardiac catheterization team, administration of aspirin, and preparation for
reperfusion therapy. The other findings, while requiring monitoring, are not immediately life-
threatening.
Question 4: Which electrolyte imbalance is most commonly associated with the development
of peaked T waves on telemetry monitoring?
A. Hypokalemia
B. Hyperkalemia
C. Hypocalcemia
D. Hypernatremia
CORRECT ANSWER: B. Hyperkalemia
RATIONALE: Hyperkalemia causes characteristic ECG changes including peaked, narrow-based T
waves, which may progress to widened QRS complexes, loss of P waves, and ultimately a sine
wave pattern as potassium levels rise. Hypokalemia typically causes flattened T waves and U
waves, hypocalcemia prolongs the QT interval, and hypernatremia does not have specific direct
ECG manifestations.
Question 5: A patient on telemetry monitoring has a pacemaker. Which ECG finding indicates
appropriate pacemaker function?
A. Absence of P waves with irregular QRS complexes
B. A pacing spike followed by a P wave or QRS complex
C. Consistent PR interval prolongation
D. Wide QRS complexes without pacing spikes
CORRECT ANSWER: B. A pacing spike followed by a P wave or QRS complex
RATIONALE: Appropriate pacemaker function is evidenced by a pacing spike (a sharp vertical
deflection) followed by capture, which appears as a P wave for atrial pacing or a QRS complex
,for ventricular pacing. This indicates the electrical impulse from the pacemaker successfully
depolarized the cardiac tissue. The other options suggest pacemaker malfunction or unrelated
rhythm disturbances.
Question 6: Which action should the nurse take FIRST when a telemetry alarm indicates
asystole?
A. Begin chest compressions immediately
B. Verify the rhythm by checking the patient and leads
C. Administer epinephrine 1 mg IV push
D. Call a rapid response team
CORRECT ANSWER: B. Verify the rhythm by checking the patient and leads
RATIONALE: Before initiating advanced cardiac life support interventions for asystole, the nurse
must first verify that the rhythm is genuine and not an artifact caused by loose leads, patient
movement, or equipment malfunction. This involves assessing the patient's pulse, breathing,
and level of consciousness while checking electrode placement and lead connections. If asystole
is confirmed, then chest compressions and activation of the emergency response team should
follow immediately.
Question 7: A patient receiving IV amiodarone for atrial fibrillation with rapid ventricular
response develops a heart rate of 38 bpm on telemetry. The nurse should anticipate
administering which medication?
A. Atropine
B. Adenosine
C. Lidocaine
D. Diltiazem
CORRECT ANSWER: A. Atropine
RATIONALE: Amiodarone can cause bradycardia as a side effect. Symptomatic bradycardia
(heart rate <40-50 bpm with signs of poor perfusion) is initially treated with atropine 0.5 mg IV
push, which may be repeated every 3-5 minutes up to a total dose of 3 mg. Adenosine is used
for terminating supraventricular tachycardias, lidocaine for ventricular arrhythmias, and
diltiazem would worsen bradycardia.
Question 8: Which telemetry lead placement is optimal for monitoring atrial activity and
detecting atrial arrhythmias?
A. Lead II
B. Lead V1
, C. Lead aVR
D. Lead III
CORRECT ANSWER: B. Lead V1
RATIONALE: Lead V1 is positioned in the fourth intercostal space at the right sternal border and
provides the best visualization of atrial activity, including P wave morphology, making it ideal for
detecting atrial arrhythmias such as atrial fibrillation, atrial flutter, and premature atrial
contractions. Lead II is commonly used for general monitoring but is less specific for atrial
activity.
Question 9: A telemetry patient reports chest pain. The nurse notes ST-segment depression in
leads V4-V6. This finding is most suggestive of:
A. Pericarditis
B. Myocardial ischemia
C. Left ventricular hypertrophy
D. Early repolarization
CORRECT ANSWER: B. Myocardial ischemia
RATIONALE: ST-segment depression, particularly in contiguous leads such as V4-V6, is a classic
ECG indicator of myocardial ischemia, representing subendocardial injury due to inadequate
oxygen supply. Pericarditis typically causes diffuse ST-segment elevation with PR depression, left
ventricular hypertrophy shows increased voltage criteria with possible ST-T changes, and early
repolarization features J-point elevation with concave ST segments.
Question 10: Which statement by a new graduate nurse indicates understanding of telemetry
alarm management?
A. "I can silence alarms if they are frequent but the patient seems stable."
B. "I should assess the patient first before responding to any telemetry alarm."
C. "Alarms can be delayed by 30 seconds to reduce noise on the unit."
D. "Only the charge nurse should respond to life-threatening arrhythmia alarms."
CORRECT ANSWER: B. I should assess the patient first before responding to any telemetry
alarm.
RATIONALE: Patient assessment is the priority when any telemetry alarm activates to determine
if the rhythm change is real or artifact and to evaluate the patient's clinical status. Silencing
alarms without assessment, delaying alarms, or restricting response to certain staff members
compromises patient safety and violates standards of telemetry monitoring practice.
