1 MCQs in Medicine for NEET PG
A 42-year-old man presents with palpitations and a sense of "extra beats" in his chest. His ECG shows an early P wave with abnormal morphology followed by a narrow QRS complex. The interval between the ectopic beat and the next sinus beat is shorter than the normal RR interval. The feature marked **C** in the diagram represents this shortened interval. What is the mechanism responsible for this finding?
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