A prolonged or shortened PR interval can indicate certain disease. When prolonged, a first degree AV block is present. When shortened, Wolff-Parkinson-White syndrome or Lown-Ganong-Levine syndrome ...
This short duration between the sinus node firing and the ventricles being depolarized results in a short PR interval on the ECG. The main distinguishing feature between LGL and WPW syndromes is ...
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