#1
What does an EKG machine measure?
Electrical activity of the heart
ExplanationMeasures heart's electrical activity.
#2
Which of the following leads is commonly used for monitoring the heart's electrical activity?
Lead II
ExplanationCommonly monitors heart's activity.
#3
In lead II of a standard 12-lead EKG, the positive electrode is placed on which part of the body?
Right leg
ExplanationPositive electrode placed on right leg.
#4
What is the standard paper speed for most EKG recordings?
50 mm/s
ExplanationStandard paper speed is 50 mm/s.
#5
What is the purpose of the ground electrode in an EKG setup?
To provide a reference point for the EKG machine
ExplanationGround electrode provides reference.
#6
What does the P wave represent in an EKG waveform?
Atrial depolarization
ExplanationRepresents atrial depolarization.
#7
Which of the following conditions might cause a 'sawtooth' pattern on an EKG?
Atrial fibrillation
ExplanationAtrial fibrillation causes 'sawtooth' pattern.
#8
What is the normal duration of the PR interval on an EKG?
0.04 to 0.10 seconds
ExplanationNormal PR interval duration.
#9
Which EKG waveform represents ventricular repolarization?
T wave
ExplanationT wave indicates ventricular repolarization.
#10
Which component of the EKG machine filters out noise and artifacts?
Notch filter
ExplanationNotch filter removes noise and artifacts.
#11
What might cause 'artifact' in an EKG recording?
All of the above
ExplanationVarious factors cause 'artifact'.
#12
What might cause 'baseline wander' in an EKG recording?
Respiratory movement
ExplanationRespiratory movement causes 'baseline wander'.
#13
Which of the following arrhythmias is characterized by a lack of P waves and irregular, chaotic QRS complexes?
Atrial fibrillation
ExplanationAtrial fibrillation lacks P waves and has irregular QRS complexes.
#14
Which of the following is a common method for troubleshooting EKG artifacts caused by patient movement?
Ensuring proper skin preparation and electrode placement
ExplanationProper skin prep and electrode placement troubleshoot artifacts.
#15
Which EKG lead placement is typically used to detect myocardial infarction in the anterior wall of the heart?
Lead V1-V4
ExplanationDetects anterior wall MI.