24. The p wave of a normal Electrocardiogram indicates A.Atrial depolarization B.Ventricular repolarization C.Atrial repolarization D.Ventricular depolarization
Option A Solution: 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.
