1 MCQs in Medicine for NEET PG
A 22-year-old male presents to the emergency department with palpitations and syncope. His ECG shows a short PR interval, a slurred initial upstroke of the QRS complex (marked **B** in the diagram), and a wide QRS duration. He is haemodynamically stable. Which of the following best explains the pathophysiology of the finding marked **B**?
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