Electrocardiogram (EKG) Fundamentals Quiz

Test your knowledge with 15 questions covering EKG basics including waveforms, intervals, and clinical implications.

#1

What does EKG stand for?

Electrocardiogram
Electrokinetic gauge
Endoscopic knee growth
Ergonomic kinetic generator
#2

What is the term for the interval between two successive QRS complexes?

RR interval
PR interval
QT interval
ST segment
#3

What is the term for an abnormally slow heart rate?

Bradycardia
Tachycardia
Arrhythmia
Sinus rhythm
#4

Which EKG lead is commonly used to assess the lateral wall of the left ventricle?

Lead I
Lead II
Lead III
Lead aVL
#5

What is the term for an absence of electrical activity in the heart?

Asystole
Ventricular fibrillation
Torsades de pointes
Sinus rhythm
#6

Which component of the heart's conduction system is responsible for initiating the heartbeat?

SA node
AV node
Purkinje fibers
Bundle of His
#7

What does the P wave represent in an EKG?

Atrial depolarization
Atrial repolarization
Ventricular depolarization
Ventricular repolarization
#8

What is the normal duration of the QRS complex in milliseconds?

Less than 0.12 seconds
0.12 - 0.20 seconds
More than 0.20 seconds
Depends on the age of the patient
#9

Which electrolyte imbalance can cause a prolonged QT interval on an EKG?

Hypokalemia
Hyperkalemia
Hypocalcemia
Hypermagnesemia
#10

What is the most common cause of peaked T waves on an EKG?

Hyperkalemia
Hypokalemia
Hypercalcemia
Hypocalcemia
#11

Which lead placement is commonly used for monitoring in a standard 12-lead EKG?

V1 - V6
Lead I, II, III
Lead aVR, aVL, aVF
Lead aVR, V1, V4
#12

In a normal sinus rhythm, what is the approximate rate of atrial depolarization in beats per minute (bpm)?

60-100 bpm
100-150 bpm
150-200 bpm
Less than 60 bpm
#13

What is the primary purpose of the ST segment analysis in an EKG?

To assess atrial activity
To evaluate ventricular depolarization
To detect myocardial ischemia or injury
To determine heart rate variability
#14

Which EKG lead is commonly used to assess the inferior wall of the heart?

Lead I
Lead II
Lead III
Lead aVF
#15

What is the most common cause of a shortened QT interval on an EKG?

Hyperkalemia
Hypokalemia
Hypercalcemia
Hypocalcemia

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