KAISER EKG FINAL EXAM WITH 100 ACTUAL QUESTIONS AND CORRECT VERIFIED ANSWERS

KAISER EKG FINAL EXAM WITH 100 ACTUAL QUESTIONS
AND CORRECT VERIFIED ANSWERS

Question 1
Which of the following EKG waveforms represents atrial depolarization?
A) P wave
B) QRS complex
C) T wave
D) U wave
E) ST segment
Correct Answer: A) P wave
Rationale: The P wave represents the electrical impulse originating in
the sinoatrial (SA) node and spreading through the atria, causing
atrial depolarization (contraction).

Question 2
What is the normal duration of the PR interval on an EKG?
A) 0.04 to 0.10 seconds
B) 0.12 to 0.20 seconds
C) 0.20 to 0.28 seconds
D) 0.08 to 0.12 seconds
E) Greater than 0.20 seconds
Correct Answer: B) 0.12 to 0.20 seconds
Rationale: The PR interval represents the time it takes for the
electrical impulse to travel from the atria through the AV node and
bundle of His to the bundle branches. Its normal duration is 0.12 to
0.20 seconds (3 to 5 small squares).

Question 3
A regular heart rhythm with a rate of 70 bpm, a P wave before every QRS,
and a normal PR interval and QRS duration describes:
A) Sinus Bradycardia
B) Sinus Tachycardia
C) Normal Sinus Rhythm

,D) Atrial Fibrillation
E) Junctional Rhythm
Correct Answer: C) Normal Sinus Rhythm
Rationale: Normal Sinus Rhythm is defined by a heart rate between
60-100 bpm, a regular rhythm, P waves preceding every QRS, and
normal PR and QRS durations.

Question 4
Which of the following EKG characteristics is indicative of Sinus Bradycardia?
A) Heart rate greater than 100 bpm.
B) Irregularly irregular rhythm.
C) Heart rate less than 60 bpm, regular rhythm, P waves before every QRS.
D) Absent P waves, narrow QRS.
E) Wide QRS, rate greater than 100 bpm.
Correct Answer: C) Heart rate less than 60 bpm, regular rhythm, P
waves before every QRS.
Rationale: Sinus Bradycardia originates from the SA node but at a
slower rate, typically below 60 bpm, while maintaining the
characteristic features of a sinus rhythm (regular, P before every
QRS).

Question 5
A patient's EKG shows an irregularly irregular rhythm with no discernible P
waves and a ventricular rate of 120 bpm. This rhythm is most likely:
A) Atrial Flutter
B) Sinus Tachycardia
C) Atrial Fibrillation
D) Ventricular Tachycardia
E) Junctional Rhythm
Correct Answer: C) Atrial Fibrillation
Rationale: Atrial fibrillation is characterized by chaotic atrial

,electrical activity (no distinct P waves), leading to an irregularly
irregular ventricular rhythm with a variable ventricular rate.

Question 6
What EKG finding is a classic sign of myocardial ischemia?
A) Pathological Q waves
B) ST segment elevation
C) ST segment depression
D) T wave inversion (non-specific)
E) Increased R wave amplitude
Correct Answer: C) ST segment depression
Rationale: ST segment depression (horizontal or downsloping) is a
classic EKG manifestation of myocardial ischemia, indicating
insufficient blood flow to the heart muscle.

Question 7
The QRS complex on an EKG represents:
A) Atrial repolarization.
B) Ventricular depolarization.
C) Atrial depolarization.
D) Ventricular repolarization.
E) AV nodal delay.
Correct Answer: B) Ventricular depolarization.
Rationale: The QRS complex represents the rapid depolarization
(contraction) of the ventricular muscle, which is a stronger electrical
event than atrial depolarization.

Question 8
What is the normal duration of the QRS complex on an EKG?
A) 0.04 to 0.10 seconds
B) 0.12 to 0.20 seconds
C) 0.20 to 0.28 seconds
D) Greater than 0.12 seconds

, E) Less than 0.04 seconds
Correct Answer: A) 0.04 to 0.10 seconds
Rationale: The normal duration of the QRS complex is typically 0.04
to 0.10 seconds (1 to 2.5 small squares). A duration greater than
0.12 seconds indicates a wide QRS.

Question 9
An EKG shows P waves with a "sawtooth" appearance, and a ventricular rate
of 150 bpm, often with a 2:1 conduction. This rhythm is:
A) Atrial Fibrillation
B) Sinus Tachycardia
C) Ventricular Tachycardia
D) Atrial Flutter
E) Supraventricular Tachycardia (SVT)
Correct Answer: D) Atrial Flutter
Rationale: Atrial flutter is characterized by a rapid, regular atrial
rhythm (typically 250-350 bpm) with distinctive "sawtooth" flutter
waves, often conducting to the ventricles in a fixed ratio (e.g., 2:1,
3:1).

Question 10
A rhythm with a heart rate of 40 bpm, regular, no P waves, and a narrow QRS
complex is consistent with:
A) Sinus Bradycardia
B) Idioventricular Rhythm
C) Junctional Escape Rhythm
D) Third-Degree AV Block
E) Atrial Fibrillation
Correct Answer: C) Junctional Escape Rhythm
Rationale: A junctional escape rhythm occurs when the SA node fails,
and the AV junction takes over as the pacemaker. It typically has a