#1
Which component of the heart initiates the electrical impulse for each heartbeat?
Sinoatrial node
ExplanationSinoatrial node initiates the heartbeat's electrical impulse.
#2
What does the 'P' wave represent in an ECG?
Atrial depolarization
Explanation'P' wave represents atrial depolarization in an ECG.
#3
What does the 'QRS complex' represent in an ECG?
Ventricular depolarization
Explanation'QRS complex' represents ventricular depolarization in an ECG.
#4
Which of the following is a common artifact seen in ECG recordings caused by patient movement?
Wandering baseline
ExplanationWandering baseline is a common artifact in ECG recordings caused by patient movement.
#5
Which wave represents ventricular repolarization in an ECG?
T wave
ExplanationT wave represents ventricular repolarization in an ECG.
#6
Which lead placement is commonly used to monitor the heart's electrical activity from a frontal plane view?
Lead II
ExplanationLead II is commonly used for monitoring heart's electrical activity from a frontal plane view.
#7
What is the standard paper speed used in most ECG machines for recording?
100 mm/s
ExplanationStandard paper speed for ECG recording is 100 mm/s.
#8
What does the term 'ST segment elevation' indicate in an ECG?
Myocardial infarction
ExplanationST segment elevation in an ECG indicates myocardial infarction.
#9
Which electrolyte imbalance is commonly associated with a prolonged QT interval on an ECG?
Hypokalemia
ExplanationProlonged QT interval on an ECG is commonly associated with hypokalemia.
#10
Which lead placement is used to view the heart's electrical activity from an inferior perspective?
Lead aVF
ExplanationLead aVF is used to view the heart's electrical activity from an inferior perspective.
#11
In which ECG lead would you typically see the tallest R wave in a healthy heart?
Lead II
ExplanationTallest R wave in a healthy heart is typically seen in Lead II.
#12
What is the standard placement for the V1 electrode in a 12-lead ECG?
Fourth intercostal space, right sternal border
ExplanationStandard placement for the V1 electrode in a 12-lead ECG is the fourth intercostal space, right sternal border.
#13
What is the approximate duration of a normal PR interval on an ECG?
0.04-0.10 seconds
ExplanationApproximate duration of a normal PR interval on an ECG is 0.04-0.10 seconds.
#14
Which ECG lead placement provides a view of the heart's electrical activity from the right shoulder to the left leg?
Lead aVR
ExplanationLead aVR provides a view of the heart's electrical activity from the right shoulder to the left leg.
#15
Which lead placement in a 12-lead ECG is used to monitor the electrical activity of the septal wall of the left ventricle?
Lead I
ExplanationLead I is used to monitor the electrical activity of the septal wall of the left ventricle in a 12-lead ECG.