BayCare EKG Test Questions
And Correct Answers (Verified
Answers) Plus Rationales
2025/2026 Q&A
1. What does the P wave represent?
A. Ventricular depolarization
B. Atrial depolarization
C. Ventricular repolarization
D. Atrial repolarization
Answer: B
The P wave reflects electrical activity spreading through the atria.
2. The QRS complex represents:
A. Atrial depolarization
B. Ventricular depolarization
C. Atrial repolarization
D. Ventricular repolarization
Answer: B
The QRS complex indicates ventricular contraction.
3. A normal PR interval is:
A. 0.04–0.10 sec
B. 0.12–0.20 sec
C. 0.20–0.30 sec
D. 0.30–0.40 sec
,Answer: B
The PR interval reflects AV conduction time.
4. What heart rate defines tachycardia?
A. <60 bpm
B. 60–100 bpm
C. >100 bpm
D. >120 bpm
Answer: C
Tachycardia is any rate above 100 bpm.
5. Sinus rhythm originates from the:
A. AV node
B. Bundle of His
C. SA node
D. Purkinje fibers
Answer: C
The SA node is the natural pacemaker.
6. A flat line on ECG indicates:
A. Ventricular tachycardia
B. Asystole
C. Atrial fibrillation
D. Bradycardia
Answer: B
Asystole is absence of electrical activity.
7. Ventricular fibrillation is characterized by:
A. Regular rhythm
B. No P waves
, C. Chaotic waveform
D. Tall QRS complexes
Answer: C
VF shows disorganized electrical activity.
8. Normal heart rate range is:
A. 40–60 bpm
B. 60–100 bpm
C. 80–120 bpm
D. 100–140 bpm
Answer: B
This is the standard adult resting range.
9. Atrial fibrillation is identified by:
A. Regular rhythm
B. Sawtooth waves
C. Irregularly irregular rhythm
D. Wide QRS
Answer: C
AFib has no consistent rhythm or P waves.
10. The ST segment represents:
A. Atrial contraction
B. Ventricular depolarization
C. Early ventricular repolarization
D. Late atrial depolarization
Answer: C
ST segment reflects early repolarization phase.
And Correct Answers (Verified
Answers) Plus Rationales
2025/2026 Q&A
1. What does the P wave represent?
A. Ventricular depolarization
B. Atrial depolarization
C. Ventricular repolarization
D. Atrial repolarization
Answer: B
The P wave reflects electrical activity spreading through the atria.
2. The QRS complex represents:
A. Atrial depolarization
B. Ventricular depolarization
C. Atrial repolarization
D. Ventricular repolarization
Answer: B
The QRS complex indicates ventricular contraction.
3. A normal PR interval is:
A. 0.04–0.10 sec
B. 0.12–0.20 sec
C. 0.20–0.30 sec
D. 0.30–0.40 sec
,Answer: B
The PR interval reflects AV conduction time.
4. What heart rate defines tachycardia?
A. <60 bpm
B. 60–100 bpm
C. >100 bpm
D. >120 bpm
Answer: C
Tachycardia is any rate above 100 bpm.
5. Sinus rhythm originates from the:
A. AV node
B. Bundle of His
C. SA node
D. Purkinje fibers
Answer: C
The SA node is the natural pacemaker.
6. A flat line on ECG indicates:
A. Ventricular tachycardia
B. Asystole
C. Atrial fibrillation
D. Bradycardia
Answer: B
Asystole is absence of electrical activity.
7. Ventricular fibrillation is characterized by:
A. Regular rhythm
B. No P waves
, C. Chaotic waveform
D. Tall QRS complexes
Answer: C
VF shows disorganized electrical activity.
8. Normal heart rate range is:
A. 40–60 bpm
B. 60–100 bpm
C. 80–120 bpm
D. 100–140 bpm
Answer: B
This is the standard adult resting range.
9. Atrial fibrillation is identified by:
A. Regular rhythm
B. Sawtooth waves
C. Irregularly irregular rhythm
D. Wide QRS
Answer: C
AFib has no consistent rhythm or P waves.
10. The ST segment represents:
A. Atrial contraction
B. Ventricular depolarization
C. Early ventricular repolarization
D. Late atrial depolarization
Answer: C
ST segment reflects early repolarization phase.
