ECG Interpretation: Final Exam and Practice Questions, Exams of Cardiology

A comprehensive set of practice questions and answers related to ecg (electrocardiogram) interpretation, covering topics such as premature ventricular complexes (pvcs), heart rhythms, lead placement, stress tests, and myocardial infarctions. It is designed to help students and professionals in the medical field test their knowledge and understanding of ecg principles and techniques. The questions cover a range of topics, including rhythm analysis, ecg lead placement, stress test protocols, and the identification of various cardiac abnormalities. This resource is valuable for those preparing for certification exams or seeking to enhance their skills in ecg interpretation.

Typology: Exams

2025/2026

Available from 09/14/2025

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CCT CCI FINAL EXAM AND PRACTICE QUESTIONS WITH CORRECT
ANSWERS
1.
Which statement is correct regarding premature ventricular
complexes (PVCs)?
PVCs originate from the atrium.
PVCs may be unifocal or multifocal in
origin. PVCs will not lead to ventricular
tachycardia.
PVCs only originate from one site in the ventricles.: PVCs may be unifocal or
multifocal in origin.
2.
A regular rhythm at a rate of 40-60 beats per minute, with
narrow QRS complexes, and no visible P waves, is consistent
with the presence of: atrial fibrillation.
sinus bradycardia.
junctional
rhythm.
idioventricular
rhythm.:
junctional
rhythm.
3.
What is the proper lead placement for a right side 12
lead ECG? limb leads only placed in a mirror image of a
standard 12 lead ECG chest leads only placed in a mirror
image of a standard 12 lead ECG
leads V1, V2, V3 only placed in a mirror image of a standard 12 lead
ECG
leads V4, V5, V6 only placed in a mirror image of a standard 12 lead
ECG: chest
leads only placed in a mirror image of a standard 12 lead ECG
4.
When conducting a Lexiscan stress test on a patient who is on a
stretcher, what safety precaution should be taken?
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CCT CCI FINAL EXAM AND PRACTICE QUESTIONS WITH CORRECT

ANSWERS

  1. Which statement is correct regarding premature ventricular complexes (PVCs)? PVCs originate from the atrium. PVCs may be unifocal or multifocal in origin. PVCs will not lead to ventricular tachycardia. PVCs only originate from one site in the ventricles.: PVCs may be unifocal or multifocal in origin.
  2. A regular rhythm at a rate of 40-60 beats per minute, with narrow QRS complexes, and no visible P waves, is consistent with the presence of: atrial fibrillation. sinus bradycardia. junctional rhythm. idioventricular rhythm.: junctional rhythm.
  3. What is the proper lead placement for a right side 12 lead ECG? limb leads only placed in a mirror image of a standard 12 lead ECG chest leads only placed in a mirror image of a standard 12 lead ECG leads V1, V2, V3 only placed in a mirror image of a standard 12 lead ECG leads V4, V5, V6 only placed in a mirror image of a standard 12 lead ECG: chest leads only placed in a mirror image of a standard 12 lead ECG
  4. When conducting a Lexiscan stress test on a patient who is on a stretcher, what safety precaution should be taken?

2 / 50 run a 12-lead ECG have crash cart available ensure patient has a pillow place patient in Trendelenburg: run a 12-lead ECG

4 / 50 beats per minute? SA nodal AV junctional idioventricular accelerated junctional: AV junctional

  1. An exercise stress test performed to:

5 / 50 evaluate disorders such as CHF. identify ischemic changes due to CAD. mimic the diastolic heart changes at rest. determine if a CABG procedure is necessary.: identify ischemic changes due to CAD.

  1. You are beginning the warmup stage of a treadmill stress test and you observe a 3mm ST segment depression in leads I and aVL. What is the first thing you should do? continue with your pre-test activities initiate the first stage of the protocol stop the treadmill and notify the physician make a note and continue with the protocol: stop the treadmill and notify the physician
  2. The intrinsic rate of the Purkinje network in the ventricles is: 20 to 40 beats per minute. 40 to 60 beats per minute. 60 to 100 beats per minute. 100 to 150 beats per minute.: 20 to 40 beats per minute.
  3. What is the heart rate of an ECG with a constant R-R interval of 30mm recorded at a standard paper speed?: 50 bpm RR duration = R-R interval/paper speed HR=60s / RR duration 30mm / 25mm/s = 1.2s 60s / 1.2 = 50bpm

7 / 50 V1 and Lead II Lead III and AVF: V1 and Lead II

  1. What is a common cause of somatic tremor? poor skin prep muscle movement wandering baseline electrical interference: muscle movement
  2. Ventricular tachycardia in which depolarization impulses moving from one ventricle to the other, resulting in a "twisted ribbon" appearance on the ECG tracing is called torsades de pointes. ventricular crossover. ventricular fibrillation. ideoventricular acceleration.: torsades de pointes.
  3. An anterior wall myocardial infarction occurs when anterior myocardial tis- sue supplied by the artery suffers injury due to lack of blood supply. right circumfle x obtuse marginal left anterior descending: left anterior descending
  4. Which ECG would you expect the doctor to order when the patient has dextrocardia? posterior 12 lead ECG standard 12

8 / 50 lead ECG right side 12 lead ECG dextrocardia right side 12 lead ECG: right side 12 lead ECG

10 / 50 tall R wave and ST depression in V1-V tall T wave and elevation in leads I and aVL inverted P wave and elevation in V5 and V6: Tall R wave and ST depression in V1-V

11 / 50

  1. What is the key to successful recording of an ECG? HIPPA wearing PPE hand hygiene communication: communication
  2. Which of the following medications is used in the treatment of ventricular arrhythmias? digoxin lidocaine verapamil nitroglycerin: lidocaine
  3. Verapamil: -calcium channel blocker -has negative chronotropic and inotropic -Treats HTN, angina and arrhyhmia
  4. After completing a standard 12 lead ECG on an adult patient, the physician requests that you include a tracing with a V4R electrode, as well. What is the physician MOST LIKELY looking for by adding this electrode? dextrocardia right bundle branch block right ventricular infarction right ventricular hypertrophy: RV infarction
  5. Which of the following is an absolute exercise stress test termination crite- ria? leg pain headache moderate to severe angina moderate shortness of breath: moderate to severe angina

13 / 50 increased afterload. decreased contractility. decreased systemic vascular resistance. increased pulmonary vascular resistance.: decreased systemic vascular resistance.

  1. In the absence of a release form, a patient's health information may be shared with the patient's without committing a HIPAA violation. child spouse physicia n verbally-reported power of attorney: physician
  2. The fifth intercostal space, left midclavicular line is a landmark for what precordial electrode placement? V V V V6: V
  3. Exercise stress testing is MOST OFTEN used to evaluate: etiology of acquired heart disease. ischemic changes due to coronary artery disease. anatomic changes due to coronary artery disease. stunned myocardium with acute myocardial infarction.: ischemic changes due to coronary artery disease.
  4. What would the heart rate be with an accelerated junctional rhythm?

14 / 50 40 to 60 bpm 41 to 100 bpm 101 to 150 bpm 150 to 250 bpm: 41 to 100 bpm

16 / 50

V

V

17 / 50

AVR

lead II: AVR

  1. The normal QRS axis of the heart is 0 to -90 degrees. 0 to +90 degrees. +60 to -60 degrees. +60 to +120 degrees.: 0 to +90 degrees.
  2. Lead placement for V4R is located where on the patient? 4th intercostal space, right sternal border 5th intercostal space, right mid- axillary line 5th intercostal space, right mid-clavicular line 5th intercostal space, right anterior axillary line: 5th intercostal space, right mid- clavicular line
  3. The sinoatrial node is located in the: left atrium. right atrium. left ventricle. right ventricle.: right atrium.
  4. When performing a 12 lead ECG you notice that leads I and II have a lot of artifact. Which electrode MOST LIKELY needs to be replaced? left leg

19 / 50 minimize P wave configuration. maximize P wave configuration.: maximize QRS configuration.

  1. Which pacemaker site is the locus of stimulation for junctional rhythms? AV node SA node Purkinje fibers bundle branches: AV node
  2. ECG PAPER provides measurement for speed and time. time and rhythm. time and voltage. rhythm and voltag: time and voltage.
  3. Pacemaker stimuli is recorded on the ECG as a(n) upright wave. negative deflection. narrow vertical spike. straight horizontal line.: narrow vertical spike.
  4. When performing an exercise stress test, 85% of the predicted maximum heart rate is used to determine the time to increase speed and elevation. end point of a submaximal exercise test. point at which continuous ECG recording begins. normal heart rate response for step II in the Bruce protocol.: end point of a submaximal exercise test.
  5. Somatic tremor is an artifact found in Holter recordings due to stress loops that are too tight. an improper ground electrode. stress loops that

20 / 50 are not secure. electrodes being placed over muscle.: electrodes being placed over muscle.