Both panels illustrate entrainment of an accessory pathway-mediated tachycardia ... pacing from a different site, the tachycardia will be entrained, but no fusion outside the circuit will occur.

Atrioventricular nodal re-entrant tachycardia ... slow-pathway modification. After a mean follow-up of 21.4 months, 21 (87.5%) of the 24 patients initially identified with AVNRT had no recurrent ...