Difference Between WPW and AVRT

[monsoon338]

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What exactly is the difference here? They both use an accessory pathway. They both can be anterograde or retrograde. I have always been confused by this. Any help differentiating the two?

 

[Stellar Clouds]

WPW is a specific type of AVRT

Just like Lown-Ganong-Levine syndrome is a type of AVRT