Cryothermal slow pathway modification for atrioventricular nodal reentrant tachycardia
Key result
Persistent dual AV nodal physiology after cryoablation for AVNRT is not associated with higher recurrence rates than complete elimination if AVNRT remains non-inducible.
Why the study?
Does complete elimination of slow pathway conduction compared to persistent dual AV nodal physiology reduce recurrence in patients undergoing cryoablation for AVNRT?
Population
185 consecutive patients undergoing a first cryoablation procedure for atrioventricular nodal reentrant…
Comparison
Transcatheter cryoablation for AVNRT achieving… vs Transcatheter cryoablation for AVNRT achieving…
Design
Cohort
Follow-up
24 months
Authors
Discussion
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Member takes
Implication
May support accepting persistent dual physiology if AVNRT non-inducible after cryoablation; leaves open optimal endpoint in prospective trials.
Study Design
Type
Cohort (n=185)
Multicenter
No
Structured PICO
Does complete elimination of slow pathway conduction compared to persistent dual AV nodal physiology reduce recurrence in patients undergoing cryoablation for AVNRT?
P
Population
185 consecutive patients undergoing a first cryoablation procedure for atrioventricular nodal reentrant tachycardia (AVNRT) between May 1999 and December 2004, mean age 43.1 +/- 15.2 years, 79.2% female.
I
Intervention
Transcatheter cryoablation for AVNRT achieving complete elimination of slow pathway conduction
C
Comparator
Transcatheter cryoablation for AVNRT achieving persistent dual AV nodal physiology with or without echo beats
O
Outcome
Recurrence of AVNRT post-cryoablation
In patients undergoing cryoablation for AVNRT, leaving persistent dual AV nodal physiology does not increase recurrence risk as long as the tachycardia is non-inducible.
Cite This Study
Khairy et al. (2007) conducted a cohort in Atrioventricular nodal reentrant tachycardia (AVNRT) (n=185). Transcatheter cryoablation vs. Complete elimination of slow pathway conduction vs. persistent dual AV nodal physiology was evaluated on Recurrence of AVNRT. Persistent dual AV nodal physiology after cryoablation for AVNRT is not associated with higher recurrence rates than complete elimination if AVNRT remains non-inducible.