Textbook Question
Explain what each of the following terms represents on an electrocardiogram (ECG).
a. P wave
b. QRS complex
c. T wave
d. P-R interval
e. S-T segment
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18. The Heart
Electrocardiogram (ECG)
Multiple Choice
Which ECG component corresponds to the depolarization of the atria?
A
QRS complex
B
P wave
C
T wave
D
ST segment
Verified step by step guidance1
Understand the basic components of an ECG (Electrocardiogram) trace: P wave, QRS complex, T wave, and ST segment.
Recall that the P wave represents the electrical activity associated with the depolarization of the atria.
Recognize that the QRS complex corresponds to the depolarization of the ventricles, not the atria.
Identify that the T wave represents the repolarization of the ventricles.
Note that the ST segment is the flat section of the ECG between the end of the S wave and the start of the T wave, indicating the period when the ventricles are depolarized.
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