#1
Which component of the ECG machine records the electrical activity of the heart?
Electrodes
Amplifier
Paper speed control
Display screen
#2
In the context of Holter monitoring, what is the primary advantage of continuous ECG recording over traditional ECG tests?
Provides real-time data during specific activities
Requires fewer electrodes
Allows for a longer duration of monitoring
Produces higher-resolution ECG waveforms
#3
What is the primary purpose of the T-wave in an ECG waveform?
Atrial depolarization
Ventricular depolarization
Atrial repolarization
Ventricular repolarization
#4
What is the standard paper speed for recording a resting ECG?
25 mm/s
50 mm/s
75 mm/s
100 mm/s
#5
Which lead placement is commonly used for monitoring cardiac activity during exercise stress testing?
Lead I
Lead II
Lead III
Chest leads (V1-V6)
#6
Which ECG lead placement is commonly used to monitor the electrical activity of the right atrium?
Lead I
Lead II
Lead III
Lead aVR
#7
What does the term 'artifact' refer to in the context of electrocardiography?
A normal ECG waveform
Unwanted interference or distortion in the ECG signal
A specific type of arrhythmia
The recording paper used in ECG machines
#8
What is the purpose of the QRS complex in an ECG waveform?
Atrial depolarization
Ventricular depolarization
Atrial repolarization
Ventricular repolarization
#9
During an exercise stress test, what does the term 'Bruce Protocol' refer to?
A standard set of physical activities performed by the patient
A type of ECG electrode used
A specific lead configuration
A calibration standard for ECG machines
#10
What does the P-wave represent in an ECG waveform?
Atrial depolarization
Ventricular depolarization
Atrial repolarization
Ventricular repolarization
#11
In Holter monitoring, what is the purpose of using a 24-hour ambulatory ECG recording?
To detect arrhythmias and ischemia
To measure blood pressure
To assess respiratory function
To monitor body temperature
#12
During an exercise stress test, what is the purpose of the recovery period monitoring?
To assess baseline heart rate
To monitor blood pressure
To observe for delayed changes or abnormalities
To measure respiratory rate
#13
Which part of the ECG complex corresponds to the electrical activity of the ventricles?
P-wave
QRS complex
T-wave
ST segment
#14
Which factor can affect the amplitude of an ECG waveform?
Paper speed
Heart rate
Lead placement
Skin resistance
#15
Which lead placement is typically used to monitor the lateral wall of the heart?
Lead I
Lead II
Lead III
Lead aVL