Electrocardiography Fundamentals Quiz

Master ECG basics with 17 essential questions. Test your knowledge on P waves, QRS complexes, lead placements, and more!

#1

What does ECG stand for in medical terms?

Electronically Controlled Graph
Electrocardiogram
Extracorporeal Circulation Generator
Enzyme-Converted Glucose
#2

What is the typical speed (mm/s) of paper movement in a standard ECG recording?

25 mm/s
50 mm/s
75 mm/s
100 mm/s
#3

What is the common cause of artifact in an ECG recording?

Electrolyte imbalance
Patient movement
Cardiac arrhythmia
Low ambient temperature
#4

Which component of the heart's electrical conduction system initiates the heartbeat?

Atrioventricular (AV) Node
Sinoatrial (SA) Node
Purkinje Fibers
Bundle of His
#5

What does the P wave represent in an ECG waveform?

Atrial repolarization
Atrial depolarization
Ventricular depolarization
Ventricular repolarization
#6

What does ST-segment elevation or depression on an ECG indicate?

Normal heart function
Myocardial infarction (heart attack)
Arrhythmia
Heart failure
#7

Which wave in the ECG corresponds to ventricular repolarization?

P wave
Q wave
R wave
T wave
#8

Which part of the heart is primarily responsible for the generation and conduction of electrical impulses?

Left ventricle
Right atrium
Aortic arch
Sinoatrial (SA) Node
#9

What is the primary purpose of the QRS complex in an ECG waveform?

Atrial depolarization
Ventricular depolarization
Ventricular repolarization
Atrial repolarization
#10

Which ECG lead placement is commonly used to assess the inferior part of the heart?

V1
V2
II
aVL
#11

Which lead placement is commonly used for monitoring the heart's electrical activity during a standard 12-lead ECG?

Right Arm (RA)
Left Leg (LL)
V1
AVR
#12

In ECG, what is the typical duration of the QT interval?

Less than 0.12 seconds
0.12 to 0.20 seconds
0.20 to 0.40 seconds
More than 0.40 seconds
#13

Which electrolyte imbalance is commonly associated with a prolonged QT interval on an ECG?

Hyperkalemia
Hypokalemia
Hyponatremia
Hypercalcemia
#14

What is the standard calibration voltage for an ECG machine during recording?

0.1 mV
0.5 mV
1 mV
2 mV
#15

In a standard 12-lead ECG, which leads are considered precordial leads?

V1 to V6
I, II, III
aVR, aVL, aVF
I, aVL, V6
#16

What condition is associated with an absence of P waves on an ECG, with irregular and chaotic QRS complexes?

Atrial fibrillation
Atrial flutter
Ventricular tachycardia
Supraventricular tachycardia
#17

Which arrhythmia is characterized by a sawtooth pattern of atrial activity on an ECG?

Atrial fibrillation
Atrial flutter
Ventricular tachycardia
Supraventricular tachycardia

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