The normal PR interval is 0.12 to 0.20 seconds, or 120 to 200 milliseconds. Note that the PR interval can be altered by changing sympathetic and parasympathetic tone. Because of this, medications ...

A normal ECG contains waves ... The intervals commonly measured on an ECG include the PR interval, QRS interval (also called QRS duration), QT interval and RR interval. Segment: The length ...

The ability to identify an abnormality on the 12-lead ECG, suggestive of underlying cardiac disease associated with sudden ... In Mobitz type I second-degree AV block, the PR interval progressively ...

Compared with individuals in whom PR interval was normal, participants with PR prolongation of more than 200 ms had a twofold higher risk of developing atrial fibrillation, a threefold higher risk ...