TO THOSE with extensive electrocardiographic experience, especially if it includes a large proportion of young adults, the finding of the pattern of a short PR interval and a prolonged QRS complex ...

The diagnosis is sinus tachycardia, short PR interval (enhanced AV conduction), and Duchenne muscular dystrophy. The rhythm is regular at a rate of 100 beats/min. A P wave occurs before each QRS ...

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 ...

The correct diagnosis is sinus rhythm with intermittent Wolff-Parkinson-White pattern (Figure 2). Figure 2. Courtesy of Philip J. Podrid, MD. There is a regular rhythm at a rate of 62 beats/min. A P ...

THE electrocardiographic picture of prolonged QRS-complex duration with short PR interval was the subject of isolated reports 1,2 until Wolff, Parkinson and White 3 described the clinical syndrome of ...

What increases or decreases the intensity of the first heart sound? Four factors affect the intensity of the first heart sound. Since the M1 portion of S1 is much louder than T1, it is only important ...