What does a segment on an ECG tracing indicate?

A segment on an ECG tracing represents a specific period of electrical activity in the heart, typically reflecting the time between different phases of the heart's electrical cycle. For example, the PR segment indicates the time it takes for electrical impulses to travel from the atria to the ventricles, while the ST segment represents the period between ventricular depolarization and repolarization. Analyzing these segments helps diagnose various cardiac conditions and assess overall heart health.