PR Interval • LITFL • ECG Library Basics
Feb 4, 2021 · The normal PR interval is between 120 – 200 ms (0.12-0.20s) in duration (three to five small squares). If the PR interval is > 200 ms, first degree heart block is said to be present.
What is a normal PR (P-R) interval?
Oct 23, 2025 · The PR interval is measured from the beginning of the P wave to the beginning of the QRS complex on a standard 12-lead ECG 1 A PR interval greater than 200 milliseconds is …
PR Interval on ECG: Normal, Short, Prolonged, Depression
Aug 16, 2025 · Learn how to interpret the PR interval on ECG — including normal physiology, how to measure it, causes of short and prolonged PR intervals, PR depression in pericarditis …
PR Interval on Your Watch ECG - Short, Normal, and Prolonged
Your ECG's PR Interval is measured in seconds, or milliseconds, because that's how "long" or "short" it takes for your heart to beat. The normal PR Interval range is from 120 milliseconds to …
What Is a Normal PR Interval on an ECG? - Biology Insights
Nov 27, 2025 · For a typical adult, the normal PR interval measurement ranges from 0.12 to 0.20 seconds. This duration corresponds to three to five small squares on the standard ECG paper …
PR Interval - My EKG
Mar 17, 2025 · Normal PR interval (0.14 s). It is generally shorter in children (see pediatric EKG) and in pregnant women, and it is longer in older persons. Prolongation of the PR interval …
PR interval - Wikipedia
In electrocardiography, the PR interval is the period, measured in milliseconds, that extends from the beginning of the P wave (the onset of atrial depolarization) until the beginning of the QRS …
ECG interpretation: Characteristics of the normal ECG (P-wave, …
The PR interval is the distance between the onset of the P-wave to the onset of the QRS complex. The PR interval is assessed in order to determine whether impulse conduction from the atria to …
What is the normal range for the PR (P-R) interval?
Mar 9, 2025 · A normal PR interval on an electrocardiogram (ECG) ranges from 120 to 200 milliseconds (0.12 to 0.20 seconds). This interval represents the time it takes for an electrical …
Understanding Normal PR Interval: A Comprehensive Guide
Jan 26, 2025 · The normal PR interval ranges from 120 to 200 milliseconds and is crucial for assessing cardiac health, with variations potentially indicating underlying heart conditions.