Multiple Choice
Which portion of the ECG corresponds to the repolarization of the atria?
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18. The Heart
Electrocardiogram (ECG)
Multiple Choice
Which of the following is the part of the ECG wave that represents ventricular contraction?
A
U wave
B
T wave
C
QRS complex
D
P wave
Verified step by step guidance1
Understand the components of an ECG wave: An ECG (Electrocardiogram) records the electrical activity of the heart and consists of several waves, each representing different phases of the cardiac cycle.
Identify the P wave: The P wave represents atrial depolarization, which is the electrical activity associated with the contraction of the atria.
Identify the QRS complex: The QRS complex represents ventricular depolarization, which is the electrical activity associated with the contraction of the ventricles.
Identify the T wave: The T wave represents ventricular repolarization, which is the process of the ventricles returning to their resting state after contraction.
Recognize the correct answer: The QRS complex is the part of the ECG wave that represents ventricular contraction, as it corresponds to the depolarization of the ventricles.
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