Introduction to Electrocardiography Pre-Test Questions - 790 Verified Questions

Introduction to Electrocardiography Pre-Test Questions

Course Introduction

Introduction to Electrocardiography offers students a comprehensive overview of the fundamental principles and practices of electrocardiogram (ECG) interpretation. The course covers the anatomical and physiological basis of the cardiac cycle, the electrical conduction system of the heart, and the techniques for performing and analyzing ECGs. Students will learn to recognize normal and abnormal rhythms, interpret common arrhythmias, and identify major cardiac conditions using ECG data. Emphasis is placed on clinical application, patient safety, and the integration of ECG findings into patient care. Ideal for students pursuing careers in medicine, nursing, or allied health professions, this course provides essential skills for diagnosing and managing cardiovascular disorders.

Recommended Textbook

EKG Plain and Simple 3rd Edition by Karen Ellis RN

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Chapter 1: Coronary Anatomy and Physiology

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Sample Questions

Q1) Pericardial fluid

A)Decreases friction of the pericardial layers as they rub against each other.

B)Prevents backflow of blood from one chamber to the other.

C)Circulates through the heart's chambers.

D)Lubricates the electrical system of the heart.

Answer: A

Q2) The normal amount of blood circulated by the heart every minute is _____ liters.

Answer: 4-8;4 to 8;Four to eight

Q3) The semilunar valves are the aortic and mitral valves.

A)True

B)False

Answer: False

Q4) The layer of the heart that is damaged during a heart attack is the A)Epicardium.

B)Pericardium.

C)Endocardium.

D)Myocardium.

Answer: D

Q5) The function of the heart is to _____.

Answer: Pump enough blood to meet the body's metabolic needs

Page 3

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Chapter 2: Electrophysiology

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Sample Questions

Q1) The normal ST segment is

A)At the isoelectric line.

B)Elevated above the isoelectric line.

C)Depressed below the isoelectric line.

D)Both above and below the isoelectric line.

Answer: A

Q2) The wave or complex that represents ventricular repolarization is the A)P wave.

B)QRS complex.

C)T wave.

D)U wave.

Answer: C

Q3) Cardiac cell stimulus during the absolute refractory period often results in very fast,dangerous rhythms.

A)True

B)False

Answer: False

Q4) The pacemaker with the slowest inherent rate is the _____. Answer: Ventricle

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Chapter 3: Lead Morphology and Placement

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Sample Questions

Q1) Lead I connects which limbs?

A)Right arm and left leg

B)Right arm and right leg

C)Right arm and left arm

D)Left arm and right leg

Answer: C

Q2) The lead whose positive pole is on the right arm and negative pole is on the left leg is

Answer: Lead II

Q3) If lead II's QRS complex is positive,the heart's current is traveling toward the A)Right arm.

B)Left arm.

C)Right leg.

D)Left leg.

Answer: D

Q4) Einthoven's triangle is formed by joining leads I,II,and III at their ends.

A)True

B)False

Answer: True

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Chapter 4: Technical Aspects of the Ekg

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Sample Questions

Q1) Microshock is different from macroshock in that microshock is

A)A higher-voltage electrical shock.

B)A lower-voltage electrical shock.

C)Caused by inadequate grounding of electrical equipment.

D)Incapable of causing death.

Q2) Artifact does not cause symptoms of decreased cardiac output.

A)True

B)False

Q3) Electrically speaking,the EKG machine is a _____ and the heart is a transmitter.

Q4) Baseline sway is caused by lotion or sweat on the skin interfering with the _____ reaching the EKG machine.

Q5) Broken recording is caused by _____.

Q6) Muscle artifact can be minimized by monitoring the patient in lead

A)I.

B)II.

C)AVR.

D)V1 or MCL1.

Q7) The EKG machine control feature that controls the size of the waves and complexes is the _____.

Q8) _____ is unwanted jitter or interference on the EKG tracing.

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Chapter 5: Calculating Heart Rate

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Sample Questions

Q1) The three methods of calculating heart rate are six-second strip,memory method,and _____.

Q2) A regular rhythm has R-R intervals that vary by only one or two little blocks.

A)True

B)False

Q3) Atrial rate can be calculated by counting

A)QRS complexes.

B)P waves.

C)PR intervals.

D)R-R intervals.

Q4) Regularity is concerned with the constancy of QRS complexes.

A)True

B)False

Q5) Heart rate is the same as _____ rate.

Q6) The most accurate way to calculate heart rate on an irregular rhythm is the six-second strip method.

A)True

B)False

Q7) A regular rhythm is one in which _____.

Q8) If the QRS complexes are all 50 little blocks apart,the heart rate is _____.

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Chapter 6: How to Interpret a Rhythm Strip

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Sample Questions

Q1) The distance between consecutive P waves is called the _____.

Q2) An abnormal rhythm is called a dysrhythmia.

A)True

B)False

Q3) The normal rhythm of the heart has P waves that are

A)Upright,matching,and precede the QRS complex.

B)Variable in shape and location.

C)Often hidden inside QRS complexes.

D)Multiple in number,preceding the QRS complex.

Q4) Sinus rhythms should have narrow QRS complexes of uniform shape.

A)True

B)False

Q5) The normal rhythm of the heart is called _____.

Q6) The normal PR interval in sinus rhythm should be _____.

Q7) Sinus rhythm has a heart rate of 60-80.

A)True

B)False

Q8) A rhythm with a heart rate greater than 100 is a tachycardia.

A)True

B)False

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Chapter 7: Rhythms Originating in the Sinus Node

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Sample Questions

Q1) Once the impulse originates in the sinus node,it travels next to the _____ by way of the interatrial tracts.

Q2) The heart rate during sinus bradycardia is greater than 100.

A)True

B)False

Q3) In sinus block,

A)The pause is a multiple of the R-R intervals.

B)There are P waves inside the pause.

C)All R-R intervals are constant.

D)The heart rate varies from 100 to 160.

Q4) High fever is a common cause of sinus arrest.

A)True

B)False

Q5) Some signs of decreased cardiac output are pallor,hypotension,and dizziness.

A)True

B)False

Q6) _____ is a rhythm with a heart rate greater than 100.

Q7) In a sinus arrest,the sinus node_____ firing for a time.

Page 9

Q8) In sinus rhythms,the QRS complexes should have an interval of _____.

Q9) A rhythm with a heart rate less than 60 is _____.

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Page 10

Chapter 8: Rhythms Originating in the Atria

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Sample Questions

Q1) Which of these statements about how sinus arrhythmia differs from wandering atrial pacemaker is true?

A)Sinus arrhythmia has uniform P wave shapes;wandering atrial pacemaker has at least three different shaped P waves.

B)Sinus arrhythmia has a regular rhythm;wandering atrial pacemaker is irregular.

C)Sinus arrhythmia has a heart rate of less than 100;wandering atrial pacemaker has a rate greater than 100.

D)Sinus arrhythmia is lethal;wandering atrial pacemaker is benign.

Q2) Atrial fibrillation is an ectopic rhythm.

A)True

B)False

Q3) The most common cause of an unexplained pause is a(n)

A)Nonconducted PAC.

B)Sinus arrest.

C)Sinus block.

D)Atrial tachycardia.

Q4) In SVT,the heart rate must be greater than 180.

A)True

B)False

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Chapter 9: Rhythms Originating in the Av Junction

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Sample Questions

Q1) Junctional rhythms originate in the

A)Sinoatrial junction.

B)Atrioventricular junction.

C)Sinoventricular junction.

D)Sinus node junction.

Q2) PJCs are _____beats from AV junction.

Q3) Treatment for junctional tachycardia might include withholding digitalis administration.

A)True

B)False

Q4) Junctional bradycardia is usually the result of usurpation.

A)True

B)False

Q5) Junctional rhythm has a heart rate the same as sinus bradycardia.

A)True

B)False

Q6) Junctional rhythm has no T waves.

A)True

B)False

Q7) Atropine should be given for junctional bradycardia if the patient is _____.

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Chapter 10: Rhythms Originating in the Ventricles

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Sample Questions

Q1) PVC stands for _____.

Q2) In P wave asystole,there are

A)No P waves or QRS complexes.

B)P waves but no QRS complexes.

C)No waves of any kind.

D)P waves and QRS complexes but no T waves.

Q3) Dying heart is another name for

A)Idioventricular rhythm.

B)Accelerated idioventricular rhythm.

C)Agonal rhythm.

D)Asystole.

Q4) P wave asystole differs from asystole in that P wave asystole has P waves;asystole is _____.

Q5) Torsades de pointes means

A)Torsion of the points.

B)Twisting of the points.

C)Tall,pointy T waves.

D)Spiked P waves.

Q6) Accelerated idioventricular rhythm has a heart rate between _____.

Q7) The treatment of choice for ventricular fibrillation is _____.

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Chapter 11: Av Blocks

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Sample Questions

Q1) 2:1 AV block is characterized by two P waves to every QRS.

A)True

B)False

Q2) The type of AV block characterized by two P waves to each QRS and a constant PR interval is

A)First-degree AV block.

B)Third-degree AV block.

C)Wenckebach.

D)2:1 AV block.

Q3) Pacemakers are typically used for Mobitz II second-degree AV block and third-degree AV block.

A)True

B)False

Q4) In a second-degree AV block,some impulses from the sinus node _____ to the ventricles;others don't.

Q5) In first-degree AV block,all sinus impulses do get through to the ventricles.

A)True

B)False

Q6) What kind of symptoms does first-degree AV block cause? _____.

Q7) AV blocks involve a block in conduction between _____.

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Chapter 12: How to Interpret a 12-Lead Ekg

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Sample Questions

Q1) The normal axis is between 0 and -90 degrees.

A)True

B)False

Q2) Low voltage EKGs can be caused by ALL BUT which of the following?

A)Obesity

B)Thyroid gland malfunction

C)Emphysema

D)Hypertension

Q3) A disorder in which there is too much potassium in the bloodstream is called

A)Hyperkalemia.

B)Hypokalemia.

C)Hypercalcemia.

D)Hypocalcemia.

Q4) An axis of -120 degrees is

A)Normal axis.

B)Left axis deviation.

C)Right axis deviation.

D)Indeterminate axis.

Q5) An axis of +120 degrees is _____ deviation.

Q6) If both lead I and AVF's QRS complexes are positive,the axis is _____.

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Chapter 13: Myocardial Infarction

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Sample Questions

Q1) Occlusion is

A)Blockage.

B)An EKG finding seen in NSTEMIs.

C)An EKG finding consistent with ischemia.

D)The opening of a coronary artery.

Q2) A right ventricular infarction is most often seen along with inferior MI.

A)True

B)False

Q3) Reciprocal ST depression is seen only when there is _____ in the indicative leads.

Q4) An old inferior MI should show significant Q waves in II,III,and AVF even after several years.

A)True B)False

Q5) A posterior infarction is usually caused by occlusion of which coronary artery?

A)Left main

B)Circumflex

C)Left anterior descending

D)Right coronary artery

Q6) Pericarditis is _____ of the pericardium.

Page 16

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Chapter 14: Medications and Electrical Therapy

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Sample Questions

Q1) VVI pacemakers are inserted into which chamber of the heart?

A)Right atrium

B)Left atrium

C)Right ventricle

D)Left ventricle

Q2) Which combination of medications would be appropriate to use for the patient in asystole?

A)Atropine and lidocaine

B)Epinephrine and amiodarone

C)Verapamil and digitalis

D)Atropine and epinephrine

Q3) A DDD pacemaker senses only the ventricle,but paces atrium and ventricle.

A)True

B)False

Q4) When a pacemaker fires,it causes a _____ on the EKG.

Q5) AED stands for _____.

Q6) Class IV antiarrhythmics are calcium channel blockers.

A)True

B)False

Q7) Treatment for VFib is to immediately _____.

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Chapter 15: Diagnostic Electrocardiography

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Sample Questions

Q1) Your patient has developed very mild chest discomfort during her treadmill stress test.She denies other symptoms and her blood pressure is stable.There are no EKG changes.What is the correct course of action?

A)Stop the test immediately.

B)Continue but watch cautiously.

C)Stop the test,assess the patient more fully,and then restart if everything is OK.

D)Back down to the next lowest stage of the test.

Q2) A MET is a

A)Measurement of energy absorption during exercise.

B)Measurement of oxygen consumption during exercise.

C)Method of exercise.

D)Pharmacologic agent used in stress testing.

Q3) The most widely known exercise protocol using a treadmill is the A)Kattus protocol.

B)Naughton protocol.

C)Bruce protocol.

D)Cornell protocol.

Q4) A positive stress test implies that _____ is present.

Q5) Thallium-201 enters the heart in much the same way as the ion _____.

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