This tracing shows normal sinus rhythm at a rate of 67 beats/min. The third through the seventh beats, as well as the last 2 beats, have a short PR interval and a slurred up-stroke to the QRS ...

Regularly occurring P waves can be appreciated. Some of the P waves either at the beginning or end of the QRS complexes are barely visible. QRS complexes occur in pairs, which rules out complete AV ...

A RECENT review of experience with the syndrome of short PR interval and abnormal ventricular complex occurring in otherwise healthy persons prone to paroxysmal tachycardia disclosed that a third of ...

2. Short PR interval and delta waves consistent with Wolff-Parkinson-White (WPW) syndrome Explanation: Wolff-Parkinson-White syndrome occurs when a person is born with an "accessory pathway" that can ...