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.

Jul 31, 2025 · For adults, a normal PR interval typically falls within the range of 0.12 to 0.20 seconds (120 to 200 milliseconds). This range corresponds to approximately three to five …

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 17, 2025 · Normal PR Interval: The normal PR measure is greater than 0.12 s and less than 0.20 s (120 to 200 ms). Short PR interval: If the PR is less than 0.12 s indicates accelerated …

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 …

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 …

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.

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 …

ECG paper commonly moves at 25 mm/second; thus, each small box (1 mm) is equivalent to 0.04 seconds (40 milliseconds), and each large box (5 mm) is equivalent to 0.2 seconds (200 …

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, PR interval …