CSCT CARDIOLOGY TECHNOLOGY CERTIFICATION EXAM
PRACTICE EXAM | ALL QUESTIONS AND ANSWERS | A+
GRADED | COMPREHENSIVE EXAM GUIDE 2026/2027
1. A patient presents for a routine 12-lead ECG and reports new-onset crushing substernal
chest pain radiating to the left arm. What should the cardiology technologist do FIRST?
A. Complete the ECG and send the patient back to the waiting area
B. Obtain the ECG promptly while initiating the appropriate emergency response according to
facility policy
C. Ask the patient to return after the pain resolves
D. Perform an exercise tolerance test to reproduce the symptoms
Answer: B
Rationale: Acute chest pain may represent a life-threatening cardiac event. The technologist
should promptly obtain diagnostic information while activating the appropriate emergency
response rather than delaying care.
2. During a standard 12-lead ECG, the technologist notices that the tracing contains
excessive baseline wandering. Which intervention is MOST appropriate?
A. Increase the paper speed
B. Increase the ECG gain
C. Reposition the patient and ensure secure electrode contact
D. Reverse the limb leads
Answer: C
Rationale: Baseline wandering is commonly associated with patient movement, respiration,
poor electrode contact, or inadequate skin preparation. Correcting electrode contact and
minimizing movement are appropriate first measures.
3. Which interval represents the time from the beginning of ventricular depolarization to
the end of ventricular repolarization?
A. QT interval
B. PR interval
C. RR interval
D. ST segment
Answer: A
Rationale: The QT interval extends from the beginning of the QRS complex through the end of
the T wave and represents ventricular depolarization and repolarization.
,4. A patient has a regular rhythm with a ventricular rate of approximately 75 beats/min,
upright P waves preceding every QRS complex, and a constant PR interval. Which rhythm
is MOST consistent with these findings?
A. Atrial fibrillation
B. Junctional rhythm
C. Ventricular tachycardia
D. Normal sinus rhythm
Answer: D
Rationale: A regular rhythm at a normal resting rate with consistent P waves preceding each
QRS and a stable PR interval is characteristic of normal sinus rhythm.
5. Which ECG measurement is generally considered the upper limit of normal for the QRS
duration?
A. 0.04 seconds
B. 0.08–0.12 seconds
C. 0.16–0.20 seconds
D. 0.24 seconds
Answer: B
Rationale: A normal QRS duration is approximately 0.08–0.12 seconds. Prolongation suggests
delayed ventricular conduction.
6. A patient becomes pale and diaphoretic while undergoing an exercise tolerance test. The
patient reports severe chest pressure. What is the MOST appropriate immediate action?
A. Increase the workload to determine whether symptoms improve
B. Continue the test until the target heart rate is reached
C. Stop the test and initiate the appropriate clinical response
D. Ask the patient to walk more slowly but continue monitoring
Answer: C
Rationale: Severe chest discomfort accompanied by concerning clinical signs is an indication
to terminate exercise and promptly assess and manage the patient according to established
emergency procedures.
7. Which lead combination is used to evaluate the electrical activity between the right arm
and left arm?
A. Lead I
B. Lead II
C. Lead III
D. aVF
Answer: A
,Rationale: Lead I records the potential difference between the right arm and left arm, with
the left arm serving as the positive electrode.
8. A patient has an ECG with an irregularly irregular ventricular rhythm and no clearly
identifiable consistent P waves. Which rhythm should the technologist recognize?
A. Sinus arrhythmia
B. Atrial flutter
C. First-degree AV block
D. Atrial fibrillation
Answer: D
Rationale: Atrial fibrillation typically produces an irregularly irregular ventricular response
and absent organized P waves.
9. During ECG preparation, which action BEST reduces skin-electrode impedance?
A. Applying lotion to the electrode site
B. Cleaning and appropriately preparing the skin before electrode placement
C. Placing electrodes over clothing
D. Increasing the ECG paper speed
Answer: B
Rationale: Proper skin preparation removes oils, perspiration, and surface debris, improving
electrode contact and reducing impedance.
10. A patient asks why several electrodes are placed on the chest during a 12-lead ECG.
What is the BEST response?
A. Each electrode measures a completely separate heartbeat
B. The electrodes create multiple electrical views of cardiac activity
C. The electrodes measure blood pressure from different locations
D. Only the chest electrodes provide clinically useful information
Answer: B
Rationale: A standard 12-lead ECG uses limb and precordial electrodes to obtain multiple
electrical perspectives of the heart.
11. Which cardiac structure normally functions as the primary pacemaker?
A. AV node
B. Bundle of His
C. Purkinje system
D. Sinoatrial node
Answer: D
, Rationale: The sinoatrial node normally generates the dominant electrical impulse and
establishes the sinus rhythm.
12. A patient's ECG demonstrates progressively lengthening PR intervals followed by a
dropped QRS complex. Which conduction abnormality is MOST likely present?
A. Mobitz I second-degree AV block
B. Mobitz II second-degree AV block
C. Complete heart block
D. First-degree AV block
Answer: A
Rationale: Mobitz I, or Wenckebach phenomenon, is characterized by progressive PR
prolongation followed by a nonconducted P wave.
13. Which statement BEST describes the purpose of a Holter monitor?
A. To provide continuous ambulatory recording of cardiac electrical activity
B. To measure cardiac ejection fraction directly
C. To determine coronary artery anatomy
D. To measure oxygen saturation during sleep only
Answer: A
Rationale: Holter monitoring provides prolonged ambulatory ECG recording, allowing
intermittent symptoms and rhythm abnormalities to be correlated with cardiac electrical
activity.
14. A patient returns a Holter monitor and reports experiencing palpitations at 14:30.
What information is MOST useful when analyzing the recording?
A. The patient's preferred exercise routine
B. The patient's documented symptom time and corresponding rhythm
C. The patient's most recent blood pressure from several months ago
D. The patient's dietary history alone
Answer: B
Rationale: Symptom timing allows the technologist and interpreting clinician to correlate
patient-reported events with the corresponding ECG rhythm.
15. Which condition is characterized by a rapid atrial rhythm with a characteristic
sawtooth baseline pattern in appropriate leads?
A. Atrial flutter
B. Sinus bradycardia
C. Ventricular fibrillation
D. Complete heart block
PRACTICE EXAM | ALL QUESTIONS AND ANSWERS | A+
GRADED | COMPREHENSIVE EXAM GUIDE 2026/2027
1. A patient presents for a routine 12-lead ECG and reports new-onset crushing substernal
chest pain radiating to the left arm. What should the cardiology technologist do FIRST?
A. Complete the ECG and send the patient back to the waiting area
B. Obtain the ECG promptly while initiating the appropriate emergency response according to
facility policy
C. Ask the patient to return after the pain resolves
D. Perform an exercise tolerance test to reproduce the symptoms
Answer: B
Rationale: Acute chest pain may represent a life-threatening cardiac event. The technologist
should promptly obtain diagnostic information while activating the appropriate emergency
response rather than delaying care.
2. During a standard 12-lead ECG, the technologist notices that the tracing contains
excessive baseline wandering. Which intervention is MOST appropriate?
A. Increase the paper speed
B. Increase the ECG gain
C. Reposition the patient and ensure secure electrode contact
D. Reverse the limb leads
Answer: C
Rationale: Baseline wandering is commonly associated with patient movement, respiration,
poor electrode contact, or inadequate skin preparation. Correcting electrode contact and
minimizing movement are appropriate first measures.
3. Which interval represents the time from the beginning of ventricular depolarization to
the end of ventricular repolarization?
A. QT interval
B. PR interval
C. RR interval
D. ST segment
Answer: A
Rationale: The QT interval extends from the beginning of the QRS complex through the end of
the T wave and represents ventricular depolarization and repolarization.
,4. A patient has a regular rhythm with a ventricular rate of approximately 75 beats/min,
upright P waves preceding every QRS complex, and a constant PR interval. Which rhythm
is MOST consistent with these findings?
A. Atrial fibrillation
B. Junctional rhythm
C. Ventricular tachycardia
D. Normal sinus rhythm
Answer: D
Rationale: A regular rhythm at a normal resting rate with consistent P waves preceding each
QRS and a stable PR interval is characteristic of normal sinus rhythm.
5. Which ECG measurement is generally considered the upper limit of normal for the QRS
duration?
A. 0.04 seconds
B. 0.08–0.12 seconds
C. 0.16–0.20 seconds
D. 0.24 seconds
Answer: B
Rationale: A normal QRS duration is approximately 0.08–0.12 seconds. Prolongation suggests
delayed ventricular conduction.
6. A patient becomes pale and diaphoretic while undergoing an exercise tolerance test. The
patient reports severe chest pressure. What is the MOST appropriate immediate action?
A. Increase the workload to determine whether symptoms improve
B. Continue the test until the target heart rate is reached
C. Stop the test and initiate the appropriate clinical response
D. Ask the patient to walk more slowly but continue monitoring
Answer: C
Rationale: Severe chest discomfort accompanied by concerning clinical signs is an indication
to terminate exercise and promptly assess and manage the patient according to established
emergency procedures.
7. Which lead combination is used to evaluate the electrical activity between the right arm
and left arm?
A. Lead I
B. Lead II
C. Lead III
D. aVF
Answer: A
,Rationale: Lead I records the potential difference between the right arm and left arm, with
the left arm serving as the positive electrode.
8. A patient has an ECG with an irregularly irregular ventricular rhythm and no clearly
identifiable consistent P waves. Which rhythm should the technologist recognize?
A. Sinus arrhythmia
B. Atrial flutter
C. First-degree AV block
D. Atrial fibrillation
Answer: D
Rationale: Atrial fibrillation typically produces an irregularly irregular ventricular response
and absent organized P waves.
9. During ECG preparation, which action BEST reduces skin-electrode impedance?
A. Applying lotion to the electrode site
B. Cleaning and appropriately preparing the skin before electrode placement
C. Placing electrodes over clothing
D. Increasing the ECG paper speed
Answer: B
Rationale: Proper skin preparation removes oils, perspiration, and surface debris, improving
electrode contact and reducing impedance.
10. A patient asks why several electrodes are placed on the chest during a 12-lead ECG.
What is the BEST response?
A. Each electrode measures a completely separate heartbeat
B. The electrodes create multiple electrical views of cardiac activity
C. The electrodes measure blood pressure from different locations
D. Only the chest electrodes provide clinically useful information
Answer: B
Rationale: A standard 12-lead ECG uses limb and precordial electrodes to obtain multiple
electrical perspectives of the heart.
11. Which cardiac structure normally functions as the primary pacemaker?
A. AV node
B. Bundle of His
C. Purkinje system
D. Sinoatrial node
Answer: D
, Rationale: The sinoatrial node normally generates the dominant electrical impulse and
establishes the sinus rhythm.
12. A patient's ECG demonstrates progressively lengthening PR intervals followed by a
dropped QRS complex. Which conduction abnormality is MOST likely present?
A. Mobitz I second-degree AV block
B. Mobitz II second-degree AV block
C. Complete heart block
D. First-degree AV block
Answer: A
Rationale: Mobitz I, or Wenckebach phenomenon, is characterized by progressive PR
prolongation followed by a nonconducted P wave.
13. Which statement BEST describes the purpose of a Holter monitor?
A. To provide continuous ambulatory recording of cardiac electrical activity
B. To measure cardiac ejection fraction directly
C. To determine coronary artery anatomy
D. To measure oxygen saturation during sleep only
Answer: A
Rationale: Holter monitoring provides prolonged ambulatory ECG recording, allowing
intermittent symptoms and rhythm abnormalities to be correlated with cardiac electrical
activity.
14. A patient returns a Holter monitor and reports experiencing palpitations at 14:30.
What information is MOST useful when analyzing the recording?
A. The patient's preferred exercise routine
B. The patient's documented symptom time and corresponding rhythm
C. The patient's most recent blood pressure from several months ago
D. The patient's dietary history alone
Answer: B
Rationale: Symptom timing allows the technologist and interpreting clinician to correlate
patient-reported events with the corresponding ECG rhythm.
15. Which condition is characterized by a rapid atrial rhythm with a characteristic
sawtooth baseline pattern in appropriate leads?
A. Atrial flutter
B. Sinus bradycardia
C. Ventricular fibrillation
D. Complete heart block
