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  1. The p wave of a normal Electrocardiogram indicates

  2. A.

     Atrial depolarization

    B.

     Ventricular repolarization

    C.

     Atrial repolarization

    D.

     Ventricular depolarization

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    Answer : Option A

    Explanation :

    The P wave indicates atrial depolarization. The P wave occurs when the sinus node, also known as the sinoatrial node, creates an action potential that depolarizes the atria. The P wave should be upright in lead II if the action potential is originating from the SA node.


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