
ECG Leads and Basic Interpretation Quiz
Quiz
•
Other
•
University
•
Hard
Simerjit Singh
FREE Resource
8 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of an Electrocardiogram (ECG)?
Assess lung function
Monitor oxygen levels
Record cardiac conduction
Measure blood pressure
Answer explanation
The purpose of an Electrocardiogram (ECG) is to record cardiac conduction, not to assess lung function, monitor oxygen levels, or measure blood pressure.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How is the Q-T interval defined in an ECG recording?
From start of atrial depolarization to start of QRS
Time required for ventricles to undergo a single cycle of depolarization and repolarization
Measured from end of P-R to end of T
From the end of one wave to the start of another
Answer explanation
Measured from end of P-R to end of T
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the (5 x 5) mm square on ECG graph paper represent?
0.04 seconds
0.1 mV
0.2 seconds
0.5 mV
Answer explanation
The (5 x 5) mm square on ECG graph paper represents 0.2 seconds.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How can heart rate be calculated using Method 1 in ECG analysis?
Count the number of small (0.04-second) time boxes between two successive R waves and divide by 300
Count the number of cardiac cycles that occur every 6 seconds and multiply by 10
Count the number of large (0.2-second) time boxes between two successive R waves and divide by 1500
Count the number of large (0.2-second) time boxes between two successive R waves and divide by 300
Answer explanation
Count the number of small (0.04-second) time boxes between two successive R waves and divide by 300
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What defines a sinus rhythm in ECG analysis?
QRS up in I and down in aVF
Variable PR interval
P wave is negative in lead I, II
Each P wave is followed by QRS
Answer explanation
Each P wave is followed by QRS, which defines a sinus rhythm in ECG analysis.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the significance of the P wave in an ECG recording?
Represents atrial depolarization
Indicates ventricular repolarization
Reflects ventricular depolarization
Measures atrial repolarization
Answer explanation
The P wave in an ECG recording represents atrial depolarization, making it the correct choice.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How is the ST segment interpreted in ECG analysis?
Represents ventricular depolarization
Indicates atrial repolarization
Reflects ventricular repolarization
Measures atrial depolarization
Answer explanation
The ST segment in ECG analysis reflects ventricular repolarization, not atrial depolarization or other cardiac events.
8.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the T wave signify in an ECG reading?
Represents atrial repolarization
Indicates ventricular depolarization
Reflects atrial depolarization
Measures ventricular repolarization
Answer explanation
The T wave in an ECG reading measures ventricular repolarization, indicating the recovery phase of the ventricles.
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