What is the normal range for a PR Interval?

The normal range for a PR interval is 0.12 to 0.20 seconds. This interval represents the time it takes for electrical impulses to travel from the atria to the ventricles through the AV node. A PR interval within this range indicates normal conduction and reflects a healthy heart rhythm.

An interval shorter than 0.12 seconds can suggest pre-excitation syndromes, while a PR interval longer than 0.20 seconds may indicate a first-degree AV block or other types of delayed conduction. Understanding the normal ranges for the PR interval is essential in diagnosing various dysrhythmias and managing patient care effectively. This range provides healthcare professionals with crucial information about the electrical activity of the heart.