#1
What does an electrocardiograph measure?
Blood pressure
Heart rate
Brain activity
Respiratory rate
#2
Which component of an electrocardiograph detects and records the electrical activity of the heart?
Electrodes
Printer
Paper
Battery
#3
What is the medical term for an abnormally slow heart rate?
Bradycardia
Tachycardia
Arrhythmia
Fibrillation
#4
What does the P wave represent in an electrocardiogram (ECG)?
Atrial depolarization
Ventricular depolarization
Ventricular repolarization
Atrial repolarization
#5
Which lead configuration is commonly used to monitor the heart's electrical activity during a standard ECG?
Bipolar limb leads
Augmented limb leads
Chest leads
All of the above
#6
What is the standard paper speed used in most electrocardiographs?
25 mm/s
50 mm/s
100 mm/s
200 mm/s
#7
Which part of the electrocardiogram represents ventricular repolarization?
QRS complex
T wave
P wave
ST segment
#8
What is the primary purpose of using gel or paste with ECG electrodes?
To improve electrode conductivity
To reduce skin irritation
To increase patient comfort
To prevent electrode displacement
#9
What does the ST segment represent in an electrocardiogram?
Ventricular depolarization
Atrial depolarization
Ventricular repolarization
Atrial repolarization
#10
Which lead placement is commonly used to monitor the electrical activity of the inferior region of the heart?
#11
What does the QT interval represent in an electrocardiogram?
Atrial depolarization to ventricular repolarization
Ventricular depolarization to ventricular repolarization
Atrial depolarization to ventricular depolarization
Ventricular repolarization to ventricular depolarization
#12
What is the normal duration of the PR interval in an ECG?
0.06 - 0.10 seconds
0.12 - 0.20 seconds
0.20 - 0.40 seconds
0.40 - 0.60 seconds
#13
Which electrolyte imbalance can cause a prolonged QT interval on an ECG?
Hyperkalemia
Hypokalemia
Hypercalcemia
Hypocalcemia
#14
Which of the following conditions is commonly associated with a widened QRS complex on an ECG?
Atrial fibrillation
Supraventricular tachycardia
Ventricular tachycardia
Normal sinus rhythm
#15
What is the term for the phenomenon where a premature atrial contraction is immediately followed by a non-conducted P wave?
Atrial escape
Atrial flutter
Atrial fibrillation
Atrial bigeminy
#16
Which of the following statements about lead aVR in a standard 12-lead ECG is true?
It represents the electrical activity of the right atrium.
It is commonly used to monitor the electrical activity of the inferior wall of the heart.
It is an augmented limb lead with a negative electrode on the right arm.
It typically shows a positive deflection for the P wave.
#17
What is the characteristic appearance of a U wave on an ECG?
A small positive deflection following the T wave
A large negative deflection preceding the P wave
A sharp spike preceding the QRS complex
A wide and irregular wave following the QRS complex