What does the term "interval" refer to on an EKG?

The term "interval" in the context of an EKG specifically refers to the duration between two specific points within the cardiac cycle, typically measured in time. An example of this would be the PR interval, which represents the time taken for electrical impulses to travel from the atria to the ventricles, measured from the onset of the P wave to the start of the QRS complex. This measurement is crucial for assessing and diagnosing various heart conditions.

Intervals on an EKG are important because they provide insight into different phases of cardiac electrical conduction. Understanding these intervals helps healthcare providers evaluate the timing of heartbeats and the conduction system's effectiveness, which is critical for recognizing arrhythmias or other underlying heart issues.