#1
Which of the following is a common cause of ECG artifact?
Muscle tremor
ExplanationMuscle tremor commonly disrupts ECG recordings by introducing interference.
#2
What is the primary function of an ECG?
To record electrical activity of the heart
ExplanationECG primarily records the heart's electrical activity for diagnostic purposes.
#3
What is the main purpose of applying conductive gel before placing ECG electrodes?
To improve electrical conductivity
ExplanationConductive gel enhances electrical conductivity, ensuring accurate ECG readings.
#4
Which of the following ECG artifacts is primarily caused by improper electrode attachment?
Electrode motion
ExplanationImproper electrode attachment often leads to electrode motion artifacts in ECG recordings.
#5
What does the term 'baseline wander' refer to in ECG analysis?
Variations in the baseline caused by patient movement
ExplanationBaseline wander refers to variations in the baseline caused by patient movement in ECG analysis.
#6
How does electrode polarization artifact typically manifest on an ECG?
As regular oscillations
ExplanationElectrode polarization artifact often manifests as regular oscillations on an ECG.
#7
What does the term 'aliasing' refer to in the context of ECG artifact?
Misinterpretation of high-frequency signals as low-frequency signals
ExplanationAliasing in ECG artifact refers to the misinterpretation of high-frequency signals as low-frequency signals.
#8
Which of the following is a common source of high-frequency interference in ECG recordings?
Electromagnetic interference
ExplanationElectromagnetic interference is a common source of high-frequency interference in ECG recordings.
#9
What is the primary cause of electrode motion artifact in ECG recordings?
Patient movement
ExplanationPatient movement is the primary cause of electrode motion artifact in ECG recordings.
#10
Which of the following techniques can help minimize powerline interference in ECG recordings?
Ensuring proper grounding
ExplanationProper grounding techniques help minimize powerline interference in ECG recordings.
#11
Which type of ECG artifact is commonly seen as a result of patient movement or tremors?
Muscle artifact
ExplanationMuscle artifact often arises due to patient movement or tremors, disrupting ECG readings.
#12
How can electrode pop artifacts in an ECG be minimized?
By ensuring proper skin preparation
ExplanationProper skin preparation helps minimize electrode pop artifacts in ECG recordings.
#13
What does the term '60-cycle interference' refer to in ECG analysis?
Noise caused by electrical interference
Explanation60-cycle interference in ECG analysis refers to noise generated by electrical interference.
#14
In ECG interpretation, what is 'electromagnetic interference' (EMI) commonly attributed to?
Cell phone usage
ExplanationElectromagnetic interference (EMI) in ECG often stems from cell phone usage.
#15
What is the primary method for reducing motion artifacts in ECG recordings?
Securing electrodes tightly
ExplanationTightly securing electrodes is the primary method to reduce motion artifacts in ECG recordings.
#16
Which of the following can cause wandering baseline artifact in an ECG?
Loose electrode connections
ExplanationWandering baseline artifact in ECG can be caused by loose electrode connections.
#17
What is the primary cause of motion artifacts in ECG recordings?
Patient movement
ExplanationMotion artifacts in ECG recordings primarily stem from patient movement.
#18
How can electrode impedance be minimized to reduce artifacts in ECG recordings?
Using conductive gel
ExplanationUsing conductive gel helps minimize electrode impedance, reducing artifacts in ECG recordings.
#19
What is a common consequence of 50/60 Hz interference in ECG recordings?
Artificial elevation of the ST segment
Explanation50/60 Hz interference in ECG recordings commonly results in the artificial elevation of the ST segment.
#20
Which of the following is a characteristic feature of muscle artifact in ECG recordings?
Irregular amplitude variations
ExplanationMuscle artifact in ECG recordings is characterized by irregular amplitude variations.
#21
Which of the following is a characteristic feature of powerline interference artifact?
Regular pattern at 60 Hz
ExplanationPowerline interference often exhibits a regular pattern at 60 Hz in ECG recordings.
#22
Which type of ECG artifact can mimic the appearance of ventricular fibrillation or fine ventricular fibrillation?
Baseline wander
ExplanationBaseline wander in ECG recordings can mimic the appearance of ventricular fibrillation.
#23
What technique is commonly used to differentiate between true ECG features and artifact?
Signal averaging
ExplanationSignal averaging is commonly used to distinguish true ECG features from artifact.
#24
Which of the following is a characteristic feature of electrode contact artifact?
Intermittent loss of signal
ExplanationElectrode contact artifact is characterized by intermittent loss of signal in ECG recordings.
#25
How can electrode pop artifact be distinguished from true cardiac events in ECG recordings?
By observing association with patient movement
ExplanationElectrode pop artifact can be distinguished from true cardiac events by observing its association with patient movement.