APPLIED RADIOLOGICAL ANATOMY

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: -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.

Detailed explanation-3: -The P wave represents atrial contraction. P waves are normally evenly rounded and either positive or negative in all leads except V1, where a biphasic wave is sometimes seen. Its duration should be less than 0.12 seconds and its amplitude less than 0.25 mV.

Detailed explanation-4: -Answer and Explanation: Atrial depolarization causes the a. P wave. Atrial depolarization is the step that will initiate the contraction of the atria that will push blood into the ventricles.