Effects of Partial and Complete Ablation of the Slow Pathway on Fast Pathway Properties in Patients with Atrioventricular Nodal Reentrant Tachycardia
Why the study?
Does complete ablation of the slow pathway compared to partial ablation affect the fast pathway effective refractory period in patients with AVNRT?
Population
20 patients with atrioventricular nodal reentrant tachycardia, no structural heart disease, and easily…
Comparison
Complete ablation of slow pathway function vs Partial ablation of slow pathway function
Design
Cohort
Authors
Discussion
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Member takes
Implication
Complete slow pathway ablation may differentially affect fast pathway properties versus partial ablation in AVNRT; leaves open effects on recurrence and optimal endpoints.
Structured PICO
Does complete ablation of the slow pathway compared to partial ablation affect the fast pathway effective refractory period in patients with AVNRT?
P
Population
20 patients with atrioventricular nodal reentrant tachycardia (AVNRT), no structural heart disease, and easily inducible AVNRT, mean age 43 +/- 13 years.
I
Intervention
Complete ablation of slow pathway function (complete loss of slow pathway function)
C
Comparator
Partial ablation of slow pathway function (residual slow pathway function)
O
Outcome
Change in fast pathway effective refractory period (ERP)surrogate
Complete, but not partial, ablation of the slow pathway in AVNRT results in shortening of the fast pathway effective refractory period, suggesting electrotonic inhibition of the fast pathway by the slow pathway.
Cite This Study
Strickberger et al. (1994) studied this question.