The intracardiac electrograms are shown during scanned single premature ventricular extrastimuli with a decreasing coupling interval in a very short RP tachycardia. What is the diagnosis and is the fast pathway essential for sustaining the tachycardia?

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10848596PMC
http://dx.doi.org/10.1002/joa3.12955DOI Listing

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