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 ...
The most common ECG finding of an acute pulmonary embolism ... Alternatively, if the PR interval is normal and the QRS duration is prolonged, then it is most likely second-degree type II Carotid ...
Upon review of this body and the described ECG findings, certain common patterns ... cocaine use and AV conduction as assessed by PR interval length appears to be somewhat contradictory.
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