EKG Multiple Choice Practice Test Questions Answers 2025

Last Updated on March 28, 2025

EKG Multiple Choice Practice Test Questions Answers 2025: EKG (electrocardiogram) multiple choice questions and answers typically refer to questions that test a person’s knowledge of EKG interpretation, cardiac anatomy, and electrophysiology. It will help you in nursing, EKG Technician, EKG certification exam, and ACLS course prep.

These questions may cover topics such as identifying the different waves and intervals on an EKG tracing, diagnosing various arrhythmias, and understanding the clinical significance of EKG findings. Multiple-choice questions are a popular format for EKG exams, as they allow for quick and efficient testing of a large amount of material. EKG multiple-choice questions and answers may be used in medical education, certification exams, or as a self-study resource for individuals looking to improve their understanding of EKG interpretation.

EKG Multiple Choice Questions Answers

0%

90

EKG Multiple Choice Practice Test Questions Answers 2025

1 / 30

1) If the electrical impulse spreads away from an area of the heart, the corresponding lead will record the impulse as:

A) Biphasic

B) Unchanged

C) Negative

D) Positive

2 / 30

2) Which component of the EKG represents ventricular depolarization?

A) T wave

B) PR interval

C) QRS complex

D) P wave

3 / 30

3) aVL is a combination of which leads?

A) II and III

B) I and III

C) I and II

D) aVR and aVF

4 / 30

4) The ability of cardiac cells to generate a pacemaker impulse is termed:

A) Excitability

B) Conductivity

C) Automaticity

D) Refractoriness

5 / 30

5) The left bundle branch is divided into which two fascicles?

A) Medial and lateral

B) Superior and inferior

C) Anterior and posterior

D) Right and left

6 / 30

6) As depolarization spreads away from a positive pole, there is a ________ deflection in that lead.

A) Biphasic

B) Negative

C) Isoelectrical

D) Positive

7 / 30

7) Which structure is known as the “gatekeeper” for electrical impulses through the heart?

A) Purkinje fibers

B) Atrioventricular node

C) Bundle of His

D) Sinoatrial node

8 / 30

8) All cardiac cells at rest possess a ______ charge.

A) Bipolar

B) Positive

C) Negative

D) Neutral

9 / 30

9) The QRS duration is:

A) 120 milliseconds

B) 80 milliseconds

C) 160 milliseconds

D) 100 milliseconds

10 / 30

10) Which lead represents the sum of the electromotive forces of the heart?

A) Lead II

B) aVF

C) Lead III

D) Lead I

11 / 30

11) aVR is a combination of which leads?

A) II and III

B) aVL and aVF

C) I and III

D) I and II

12 / 30

12) Which interval on the EKG represents the entirety of ventricular depolarization and repolarization?

A) QRS complex

B) QT interval

C) PR interval

D) ST segment

13 / 30

13) The R wave should be distinctly larger than the S wave by which precordial lead?

A) V4

B) V3

C) V2

D) V1

14 / 30

14) The PR interval is:

A) 160 milliseconds

B) 100 milliseconds

C) 200 milliseconds

D) 120 milliseconds

15 / 30

15) The bundle branches consist of rapidly conducting fibers known as:

A) Septal fibers

B) Endocardial fibers

C) Purkinje fibers

D) Myocardial fibers

16 / 30

16) aVF is a combination of which leads?

A) aVL and aVR

B) I and III

C) I and II

D) II and III

17 / 30

17) A normal QT interval is considered to be:

A) Between 300 and 400 milliseconds

B) Less than 440 to 460 milliseconds

C) More than 500 milliseconds

D) Less than 300 milliseconds

18 / 30

18) Define Einthoven’s equation.

A) I – III = II

B) I + III = II

C) II + III = I

D) I + II = III

19 / 30

19) A U wave is more likely to be observed during:

A) Ectopic rhythm

B) Tachycardia

C) Normal sinus rhythm

D) Bradycardia

20 / 30

20) The point marking the end of the QRS complex and the beginning of the ST segment is called the:

A) S inflection

B) R junction

C) T point

D) J point

21 / 30

21) Which limb leads are unipolar?

A) II and aVL

B) I and aVF

C) I, II, and III

D) aVR, aVL, and aVF

22 / 30

22) QTc prolongation can predispose a patient to:

A) Sinus tachycardia

B) Ventricular arrhythmias

C) Atrial fibrillation

D) First-degree heart block

23 / 30

23) Which limb leads are bipolar?

A) II and III

B) aVR, aVL, and aVF

C) I, II, and III

D) I and II

24 / 30

24) A normal PR interval is:

A) 60 to 100 milliseconds

B) 200 to 280 milliseconds

C) 120 to 200 milliseconds

D) 80 to 120 milliseconds

25 / 30

25) Normal sinus node activity is typically between ______ and ______ beats per minute.

A) 60–100 bpm

B) 40–60 bpm

C) 120–160 bpm

D) 100–140 bpm

26 / 30

26) As depolarization spreads toward a positive pole, there is a ________ deflection in that lead.

A) Biphasic

B) Negative

C) Positive

D) Isoelectrical

27 / 30

27) A normal QRS duration is:

A) 200 to 240 milliseconds

B) 80 to 120 milliseconds

C) 120 to 200 milliseconds

D) 40 to 60 milliseconds

28 / 30

28) Which part of the EKG marks the end of the absolute refractory period?

A) Apex of the T wave

B) Onset of the ST segment

C) Beginning of the T wave

D) End of the QRS complex

29 / 30

29) The sinus node is located in the:

A) Low right atrium

B) High right atrium

C) Interventricular septum

D) Left ventricle

30 / 30

30) If the electrical impulse spreads toward an area of the heart, the corresponding lead will record the impulse as:

A) Isoelectric

B) Positive

C) Biphasic

D) Negative

Your score is

See also: