What is the p wave?

The P wave is the first wave on an electrocardiogram (ECG) that represents the electrical activity associated with atrial depolarization, or the contraction of the atria. It signifies the initiation of the cardiac cycle and is typically a small deflection that occurs before the QRS complex.

The P wave is generated as an electrical impulse travels through the atria, causing the muscle fibers to contract and push blood into the ventricles. It is important for coordinating the timing of atrial and ventricular contractions to ensure efficient pumping of blood through the heart.

The duration, amplitude, and morphology of the P wave can provide important information about the health of the heart and the underlying electrical conduction system. Abnormalities in the P wave can indicate conditions such as atrial enlargement, atrial fibrillation, or other heart rhythm disorders.

Overall, the P wave is a key component of the ECG that helps healthcare providers monitor and diagnose various heart conditions.