Electrocardiography Fundamentals and Application Quiz
Challenge yourself with questions on ECG fundamentals and interpretation. Test your understanding of ECG waves, intervals, and arrhythmias.
#1
What does an electrocardiogram (ECG or EKG) measure?
Blood pressure
Heart rate
Oxygen levels in the blood
Respiration rate
#2
What is the standard paper speed used in most ECG recordings?
25 mm/s
50 mm/s
75 mm/s
100 mm/s
#3
Which of the following leads in an ECG records the electrical activity of the heart in the horizontal plane?
Lead I
Lead II
Lead aVR
Lead V1
#4
Which of the following represents the P-wave in an ECG?
First upward deflection
Downward deflection after the QRS complex
Downward deflection before the QRS complex
Second upward deflection
#5
What is the typical duration of the QRS complex in a normal ECG?
Less than 0.06 seconds
Between 0.06 and 0.10 seconds
Between 0.10 and 0.20 seconds
More than 0.20 seconds
#6
Which lead configuration is commonly used in a standard 12-lead ECG?
Unipolar limb leads
Bipolar limb leads
Augmented limb leads
Chest leads
#7
What does the T-wave represent in an ECG?
Atrial depolarization
Atrial repolarization
Ventricular depolarization
Ventricular repolarization
#8
Which ECG lead is typically used to diagnose myocardial infarction?
Lead I
Lead II
Lead III
Lead V1
#9
What does the ST segment represent in an ECG?
Ventricular depolarization
Atrial depolarization
Ventricular repolarization
Atrial repolarization
#10
What is the significance of the PR interval in an ECG?
Duration of atrial depolarization
Duration of ventricular depolarization
Conduction time from atria to ventricles
Duration of ventricular repolarization
#11
Which electrolyte imbalance can cause a characteristic 'U' wave in an ECG?
Hyperkalemia
Hypokalemia
Hyponatremia
Hypernatremia
#12
What is the term for an abnormal ECG rhythm characterized by chaotic, irregular atrial activity?
Sinus bradycardia
Atrial fibrillation
Ventricular tachycardia
Heart block
#13
What does a 'bundle branch block' pattern indicate on an ECG?
Impaired conduction in the atrioventricular node
Impaired conduction in the bundle of His
Delayed conduction in the right or left bundle branches
Complete heart block
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