Multiple Choice
Ventricular depolarization and repolarization are represented by which measure on an electrocardiogram (ECG)?
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18. The Heart
Electrocardiogram (ECG)
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What does the T wave of the electrocardiogram (ECG) represent?
A
Atrial repolarization
B
Atrial depolarization
C
Ventricular depolarization
D
Ventricular repolarization
Verified step by step guidance1
Understand the components of an electrocardiogram (ECG): An ECG is a graphical representation of the electrical activity of the heart. It consists of several waves, each representing a specific phase of the cardiac cycle.
Identify the key waves in an ECG: The main waves are the P wave, QRS complex, and T wave. Each wave corresponds to different electrical events in the heart.
Recognize the P wave: The P wave represents atrial depolarization, which is the electrical activity that triggers the contraction of the atria.
Understand the QRS complex: The QRS complex represents ventricular depolarization, which is the electrical activity that triggers 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.
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