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.

In this article, I am going to show you a simple way on how to measure the PR interval. At the end of the article, you can test your knowledge on how to measure PR intervals.

Mar 17, 2025 · The PR interval is measured from the beginning of the P wave to the beginning of the QRS complex. It comprises the P wave and the PR segment. The interval should be …

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 …

Mar 11, 2025 · The PR interval is measured using an electrocardiogram, also called ECG or EKG. This is a painless test performed on cardiac patients in order to measure the electrical …

This video explains how to measure the PR interval on an EKG strip. In order to do this you must know how the normal measurement of a PR interval and how to count the small blocks...

PR Interval In this lesson, we will cover how to measure the PR interval. Remember that the PR interval starts at the start of the P wave and ends at the start of the QRS: There are 2 …

Nov 8, 2021 · Measurement of the PR interval reflects the amount of time from the beginning of atrial depolarization to the beginning of ventricular depolarization. Plainly stated, this …

Mar 2, 2025 · Discover the secrets of calculating the PR interval, a vital ECG measurement. Learn how to interpret this critical indicator accurately, gaining insights into heart health and rhythm.

Jul 9, 2020 · There are three ways to calculate a heart rate using an EKG. If the rhythm is regular, the small box method and big block method can be used. If the rhythm is irregular, the six …