- Normal P Wave: Typically, a normal P wave is smooth and round, with a duration of less than 0.12 seconds and an amplitude of less than 2.5 mm. It is positive in leads I, II, and aVF. - Abnormal P Wave: Abnormalities in the P wave can indicate various cardiac conditions. For instance, a tall, peaked P wave may suggest right atrial enlargement, while a broad, notched P wave may indicate left atrial enlargement.
