May 1, 1991Circulation
Catheter ablation of atrioventricular junction using radiofrequency current in 17 patients. Comparison of standard and large-tip catheter electrodes.
Why the study?
Does a large-tip electrode improve the efficiency of producing complete atrioventricular block compared to standard electrodes in patients with drug-resistant supraventricular tachyarrhythmias?
Population
17 patients with drug-resistant supraventricular tachyarrhythmias
Comparison
Radiofrequency catheter ablation of the… vs Radiofrequency catheter ablation using a 6F or…
Design
Cohort
Follow-up
mean 8.7 months
Authors
Discussion
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Implication
Large-tip electrodes may expedite AV junction ablation; hypothesis-generating and should not yet change practice.
Structured PICO
Does a large-tip electrode improve the efficiency of producing complete atrioventricular block compared to standard electrodes in patients with drug-resistant supraventricular tachyarrhythmias?
P
Population
17 patients with drug-resistant supraventricular tachyarrhythmias
I
Intervention
Radiofrequency catheter ablation of the atrioventricular junction using a 7F quadripolar catheter with a large-tip electrode (4 mm long; surface area, 27 mm2) at 50-60 V (n=10)
C
Comparator
Radiofrequency catheter ablation using a 6F or 7F catheter with six or eight standard electrodes (1.25 mm wide, 2.5-mm spacing) at 40 V (n=7)
O
Outcome
Complete atrioventricular block
The use of a large-tip electrode for radiofrequency ablation of the AV junction allows for higher power delivery, markedly decreasing the number of pulses and time required to achieve complete AV block compared to standard electrodes.
Cite This Study
Jackman et al. (1991) studied this question.