Coincidence of idiopathic ventricular outflow tract tachycardia and atrioventricular nodal reentrant tachycardia
Key result
Among patients with idiopathic outflow tract VT, 15% (7 of 46) had coincident AVNRT, and catheter ablation of one arrhythmia substrate did not prevent inducibility or recurrence of the other.
Why the study?
Does catheter ablation of one arrhythmia substrate prevent the occurrence of another in patients with coincident idiopathic outflow tract VT and AVNRT?
Population
7 patients with clinically documented idiopathic outflow tract VT and reproducibly inducible AVNRT, mean age…
Design
Case_series
Authors
Discussion
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Implication
Case-level data suggest targeting both substrates; hypothesis-generating for dual ablation in coincident outflow tract VT and AVNRT.
Study Design
Type
Observational (n=46)
Multicenter
No
Structured PICO
Does catheter ablation of one arrhythmia substrate prevent the occurrence of another in patients with coincident idiopathic outflow tract VT and AVNRT?
P
Population
7 patients with clinically documented idiopathic outflow tract VT and reproducibly inducible AVNRT (out of 46 patients with idiopathic outflow tract VT), mean age 35+/-9 years, 2 men and 5 women, without structural heart disease.
I
Intervention
Radiofrequency catheter ablation of one arrhythmia substrate (slow pathway or VT)
O
Outcome
Inducibility or clinical recurrence of the other arrhythmia
In patients with coincident idiopathic outflow tract VT and AVNRT, ablation of one substrate does not prevent recurrence of the other, suggesting both should be ablated in a single session.
Cite This Study
Josef Kautzner (2003) conducted an observational in Idiopathic ventricular outflow tract tachycardia and atrioventricular nodal reentrant tachycardia (n=46). Radiofrequency catheter ablation was evaluated on Coincidence of idiopathic outflow tract VT and AVNRT. Among patients with idiopathic outflow tract VT, 15% (7 of 46) had coincident AVNRT, and catheter ablation of one arrhythmia substrate did not prevent inducibility or recurrence of the other.