Multiple Choice
Which wave on the ECG represents the depolarization of the atria?
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18. The Heart
Electrocardiogram (ECG)
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Which of the following electrocardiogram (ECG) waves represents atrial depolarization?
A
Q wave
B
R wave
C
P wave
D
T wave
Verified step by step guidance1
Understand the basic components of an electrocardiogram (ECG), which records the electrical activity of the heart over time.
Recognize that the ECG consists of several waves: P wave, QRS complex (which includes Q, R, and S waves), and T wave.
Learn that the P wave represents the electrical activity associated with the depolarization of the atria, which is the initial phase of the cardiac cycle.
Identify that the QRS complex represents ventricular depolarization, and the T wave represents ventricular repolarization.
Conclude that the P wave is the correct answer as it specifically corresponds to atrial depolarization.
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