Feb 4, 2021 · Note how the baseline PR interval is prolonged, and then further prolongs with each successive beat, until a QRS complex is dropped. The PR interval before the dropped beat is the …

A PR interval exceeding 200 milliseconds is considered prolonged. Healthcare professionals interpret these tracings to assess heart function and identify conduction abnormalities.

PR prolongation is associated with increased risks of AF, pacemaker implantation, and death.

Nov 25, 2025 · The PR interval is a fundamental measurement on an electrocardiogram (ECG) that reflects the heart’s electrical communication system. When this measurement is prolonged, it …

May 22, 2025 · A prolonged PR interval can indicate first-degree atrioventricular block, which may lead to symptoms such as fatigue, exertional intolerance, or dizziness, particularly if the PR interval is …

A long PR interval (of over 200 ms) indicates a slowing of conduction between the atria and ventricles, usually due to slow conduction through the atrioventricular node (AV node). [1]

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 and atrial …

However, there is emerging evidence that prolonged PR interval may be associated with adverse outcomes. This study aims to determine if prolonged PR interval is associated with adverse …

Despite the complexity of the components of the PR interval, simple prolongation of the PR interval is almost invariably due to a block in the AV node and is, of course, accompanied by no symptoms.

Your ECG's PR interval shows how long it takes for your heart's electrical signal to get from the top of your heart, to the bottom of your heart. A prolonged PR interval is 200 milliseconds or longer, which …