Comparison of transseptal puncture using a dedicated RF wire versus a mechanical needle with and without electrification in an animal model.

The AcQCross needle frequently required higher energy of 30 W to achieve RF TSP and was associated with tissue coring and charring, which have been, previously, reported when electrifying a standard open-ended mechanical needle or guidewire. These findings may limit safety and effectiveness compared to the VersaCross system.