#1
Which of the following components of the heart generates the electrical impulses?
Atria
Ventricles
SA Node
AV Node
#2
What is the standard paper speed used in most electrocardiogram recordings?
25 mm/s
50 mm/s
75 mm/s
100 mm/s
#3
Which wave represents ventricular depolarization in an EKG?
P wave
QRS complex
T wave
ST segment
#4
What is the normal duration of the PR interval in an EKG?
0.04 to 0.10 seconds
0.10 to 0.20 seconds
0.20 to 0.40 seconds
0.40 to 0.60 seconds
#5
In a normal sinus rhythm, what is the rate of the electrical impulses originating from the SA node per minute?
60 to 100 beats per minute
40 to 60 beats per minute
100 to 140 beats per minute
Below 40 beats per minute
#6
Which component of the EKG waveform corresponds to ventricular repolarization?
P wave
QRS complex
T wave
ST segment
#7
Which of the following leads is commonly referred to as the 'Augmented Vector Right' lead?
Lead I
Lead II
Lead III
Lead aVR
#8
What does the 'P' wave represent in an electrocardiogram?
Atrial repolarization
Atrial depolarization
Ventricular repolarization
Ventricular depolarization
#9
Which electrode placement is typically used as the ground electrode in a standard 12-lead EKG?
Right arm
Left arm
Right leg
Left leg
#10
What does a prolonged QT interval on an EKG indicate?
Supraventricular tachycardia
Ventricular fibrillation
Bradycardia
Increased risk of arrhythmias
#11
Which electrode placement is used to record the V1 lead in a standard 12-lead EKG?
Right sternal border, 4th intercostal space
Left sternal border, 4th intercostal space
Midclavicular line, 5th intercostal space
Midaxillary line, 5th intercostal space
#12
Which of the following leads represents the electrical activity between the left arm and the right leg in a standard 12-lead EKG?
Lead I
Lead II
Lead III
Lead aVR
#13
What does the presence of U waves on an EKG typically indicate?
Atrial enlargement
Hypokalemia
Myocardial infarction
Ventricular hypertrophy
#14
What does a 'ST segment elevation' indicate in an electrocardiogram?
Atrial enlargement
Ventricular hypertrophy
Myocardial infarction
Bundle branch block
#15
Which of the following conditions can cause a 'sawtooth' pattern on an EKG?
Atrial fibrillation
Ventricular tachycardia
Supraventricular tachycardia
Atrial flutter
#16
What is the significance of the J point in an EKG?
Represents the end of atrial depolarization
Marks the beginning of ventricular repolarization
Indicates the onset of ventricular depolarization
Marks the end of ventricular depolarization
#17
What does the presence of a delta wave in an EKG suggest?
Atrioventricular block
Ventricular fibrillation
Wolff-Parkinson-White syndrome
Atrial flutter
#18
What does a 'bundle branch block' pattern indicate in an EKG?
Atrial fibrillation
Ventricular hypertrophy
Ventricular conduction delay
Myocardial infarction
#19
What is the expected axis deviation in a normal EKG?
Between -30° and +90°
Between -90° and +180°
Between -90° and +90°
Between -180° and +180°
#20
What does the presence of 'Osborn waves' on an EKG suggest?
Hyperkalemia
Hypokalemia
Hypocalcemia
Hypercalcemia