1 MCQs in Medicine for NEET PG
A 22-year-old male presents to the emergency department with palpitations and dizziness. His ECG shows a short PR interval (<120 ms), a slurred initial upstroke of the QRS complex (delta wave), and a wide QRS (>120 ms). The structure marked **A** in the diagram represents the electrocardiographic findings of Wolff-Parkinson-White syndrome. Which of the following best explains the mechanism by which the delta wave and short PR interval are produced in this condition?
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