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 …

Prolongation of the electrocardiographic PR interval, known as first-degree atrioventricular block when the PR exceeds 200 milliseconds, is frequently encountered in clinical practice.

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

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 …

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 …

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 …

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 …

If a PR interval is prolonged, the impulse from the sinoatrial node took too long to reach the intra-atrial pathways and the AV node. A prolonged or widened QRS complex may indicate that the impulse …