MEDICAL
HEART AND PERICARDIUM
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What represents the P wave?
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rapid ventricular depolarization
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ventricular repolarization
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atrial depolarization
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arterial repolarization
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Explanation:
Detailed explanation-1: -The P wave represents the electrical depolarization of the atria. In a healthy person, this originates at the sinoatrial node (SA node) and disperses into both left and right atria.
Detailed explanation-2: -Atrial depolarization is reflected by the P wave, and ventricular depolarization is reflected by the QRS complex, whereas the T wave reflects ventricular repolarization, see Figure 6.10.
Detailed explanation-3: -âPâ wave is the first wave in an ECG and is a positive wave. It indicates the activation of the SA nodes. âTâ wave too is a positive wave and is the final wave in an ECG though sometimes an additional U wave may be seen. It represents ventricular relaxation.
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