#1
Which of the following is a common cause of baseline artifact in an EKG?
Muscle movement
Electrical interference
Loose electrode connection
Breathing patterns
#2
Which EKG lead placement is most commonly used for monitoring in routine clinical practice?
Lead I
Lead II
Lead III
Lead aVR
#3
What is the primary purpose of the P wave in an EKG recording?
Represents atrial depolarization
Indicates ventricular repolarization
Marks the end of the QRS complex
Measures atrial contraction
#4
What does the ST segment represent in an EKG?
Atrial depolarization
Ventricular depolarization
Atrial repolarization
Ventricular repolarization
#5
Which EKG lead placement is commonly used for detecting anterior myocardial infarctions?
Lead I
Lead II
Lead III
Lead aVR
#6
What is the recommended paper speed for standard EKG recordings?
25 mm/s
50 mm/s
75 mm/s
100 mm/s
#7
How can motion artifact be minimized during an EKG recording?
Using a higher paper speed
Encouraging the patient to move
Securing electrodes tightly
Ensuring proper skin preparation
#8
What is the purpose of using an EKG filter?
To add noise to the signal
To remove artifacts
To decrease heart rate
To change the paper speed
#9
How does hyperventilation affect the appearance of an EKG recording?
It causes ST elevation
It increases the heart rate
It induces arrhythmias
It results in T-wave inversion
#10
Which electrolyte imbalance is commonly associated with a prolonged QT interval on an EKG?
Hyperkalemia
Hypokalemia
Hyponatremia
Hypercalcemia
#11
What effect does a right bundle branch block (RBBB) have on the QRS complex in lead V1?
No change
Widened and positive deflection
Widened and negative deflection
Narrowed and positive deflection
#12
Which of the following is a potential source of AC interference in EKG signals?
Metallic electrodes
Proper grounding
Fluorescent lighting
Shielded cables
#13
What precaution should be taken when using a defibrillator in close proximity to an EKG machine?
Ensure a high paper speed
Pause EKG recording during defibrillation
Increase the gain setting
Use a higher frequency filter
#14
What is the significance of the PR interval on an EKG?
It represents ventricular depolarization
It measures atrial repolarization
It indicates the duration of atrioventricular conduction
It signifies ventricular repolarization
#15
In which lead would you typically observe the QRS complex with a predominantly negative deflection?
Lead I
Lead II
Lead III
Lead aVR
#16
What is the significance of a peaked T wave on an EKG?
Normal finding
Indicates myocardial infarction
Suggests hyperkalemia
Sign of ventricular depolarization
#17
Which lead is commonly used for detecting an inferior myocardial infarction?
Lead I
Lead II
Lead III
Lead aVR