What is the triad commonly associated with Wolff-Parkinson-White (WPW) syndrome?

What is the triad commonly associated with Wolff-Parkinson-White (WPW) syndrome?

• A. Short PR, narrow QRS, delta wave
• B. Short PR, wide QRS, delta wave
• C. Long PR, wide QRS, delta wave
• D. Normal PR, narrow QRS, delta wave

Answer: (B)

Wolff-Parkinson-White (WPW) syndrome is characterized by a specific set of findings on an electrocardiogram (ECG), commonly known as the triad. The correct option highlights the presence of a short PR interval, a wide QRS complex, and the characteristic delta wave. The short PR interval in WPW occurs because the accessory pathway allows for earlier depolarization of the ventricles compared to the normal conduction system. This leads to a more immediate activation of the ventricles after atrial depolarization, reducing the time between atrial and ventricular contraction. The delta wave is a distinctive feature of WPW. It represents the initial phase of ventricular depolarization that is conducted through the accessory pathway, producing a slurred upstroke on the QRS complex. This feature contributes to the wide QRS complex observed in WPW, as the conduction through the accessory pathway takes longer than normal conduction through the His-Purkinje system. In summary, the combination of a short PR interval, delta wave, and wide QRS complex defines the typical ECG findings associated with WPW syndrome, making the highlighted choice the correct one. This triad is crucial for identifying the condition and differentiating it from other forms

Wolff-Parkinson-White (WPW) syndrome is characterized by a specific set of findings on an electrocardiogram (ECG), commonly known as the triad. The correct option highlights the presence of a short PR interval, a wide QRS complex, and the characteristic delta wave.

The short PR interval in WPW occurs because the accessory pathway allows for earlier depolarization of the ventricles compared to the normal conduction system. This leads to a more immediate activation of the ventricles after atrial depolarization, reducing the time between atrial and ventricular contraction.

The delta wave is a distinctive feature of WPW. It represents the initial phase of ventricular depolarization that is conducted through the accessory pathway, producing a slurred upstroke on the QRS complex. This feature contributes to the wide QRS complex observed in WPW, as the conduction through the accessory pathway takes longer than normal conduction through the His-Purkinje system.

In summary, the combination of a short PR interval, delta wave, and wide QRS complex defines the typical ECG findings associated with WPW syndrome, making the highlighted choice the correct one. This triad is crucial for identifying the condition and differentiating it from other forms