What does the P-P interval measure?

The P-P interval specifically measures the time between successive atrial depolarization cycles. This interval is critical in assessing the rhythm of the heart, particularly how often the atria are contracting. It begins at one P wave and ends at the next P wave. A consistent P-P interval suggests a regular atrial rhythm, providing valuable information for diagnosing arrhythmias and other cardiac conditions.

Understanding the P-P interval is essential for healthcare professionals monitoring heart activity, as it helps evaluate the frequency of atrial contractions and can indicate whether the atrial rate is normal or if there are disturbances in the heart's electrical conduction.