SHARP ECG Test – Questions with Correct Answers (Verified 2025)

SHARP ECG Test – Questions with Correct
Answers (Verified 2025)
SHARP ECG Test – 100 Questions with Correct
Answers (Verified 2025)
Section 1: Fundamentals & Measurements

1. What does the PR interval on an ECG represent?
A) Ventricular depolarization and repolarization
B) Atrial depolarization only
C) The time from the onset of atrial depolarization to the onset of ventricular
depolarization
D) The total time for a cardiac cycle

2. The primary pacemaker of the heart is the:
A) Atrioventricular (AV) node
B) Purkinje fibers
C) Sinoatrial (SA) node
D) Bundle of His

3. What is the normal duration of the QRS complex?
A) < 0.12 seconds
B) 0.12-0.20 seconds
C) 0.06-0.10 seconds
D) > 0.20 seconds

4. The ECG leads that provide a view of the heart in the horizontal plane are the:
A) Augmented leads (aVR, aVL, aVF)
B) Precordial leads (V1-V6)
C) Limb leads (I, II, III)
D) Bipolar leads

5. On an ECG, one small box represents how much time?
A) 0.20 seconds
B) 0.04 seconds

, C) 0.12 seconds
D) 1.0 second

6. The QT interval should be corrected for heart rate. What is this called?
A) QRS correction
B) Bazett's formula
C) The Framingham calculation
D) PR adjustment

7. Which lead is typically used to assess the rhythm strip?
A) V1
B) aVR
C) Lead II
D) V5

8. The T-wave on an ECG represents:
A) Atrial repolarization
B) Ventricular depolarization
C) Ventricular repolarization
D) Atrial depolarization

9. A heart rate calculated at 30 beats per minute on the ECG is most likely due to:
A) Sinus tachycardia
B) Atrial flutter
C) Sinus bradycardia
D) Artifact or counting error

10. The normal PR interval duration is:
A) 0.12 - 0.20 seconds
B) < 0.12 seconds
C) 0.20 - 0.30 seconds
D) Highly variable

Section 2: Rhythm Identification (Sinus & Atrial)

11. A rhythm with a rate of 105 bpm, a normal P wave before each QRS, and a constant PR
interval is:
A) Sinus Bradycardia
B) Sinus Tachycardia
C) Atrial Fibrillation
D) Junctional Rhythm

, 12. The defining characteristic of Sinus Arrhythmia is:
A) Irregular P-P intervals that vary with respiration
B) Absent P waves
C) A consistently fast rate
D) Wide QRS complexes

13. In Wandering Atrial Pacemaker, the ECG will show:
A) Identical P waves from a single site
B) At least three different P wave morphologies
C) Sawtooth flutter waves
D) No P waves with an irregular rhythm

14. A rhythm with an irregularly irregular rhythm, no discernible P waves, and fibrillatory
waves is:
A) Atrial Tachycardia
B) Atrial Flutter
C) Atrial Fibrillation
D) Ventricular Tachycardia

15. Atrial Flutter is classically characterized by:
A) Chaotic atrial activity
B) Sawtooth-shaped flutter (F) waves
C) Inverted P waves in lead II
D) A rate of 150 bpm

16. A premature, abnormal-looking P wave followed by a normal QRS complex indicates a:
A) Premature Ventricular Complex (PVC)
B) Premature Atrial Complex (PAC)
C) Bundle Branch Block
D) Junctional Escape Beat

17. In Supraventricular Tachycardia (SVT), the QRS complex is typically:
A) Wide (>0.12 sec)
B) Narrow (<0.12 sec)
C) Absent
D) Preceded by no P wave

18. A rhythm with no P waves, a regular narrow QRS complex, and a rate of 40-60 bpm is
most likely:
A) Sinus Bradycardia