Key result
Radiofrequency ablation using dual thermocouple electrodes at the edges significantly reduced impedance rises (2.1% vs 44.6%; P<0.0001) compared to single centered thermistor electrodes.
Why the study?
Does monitoring temperature at the edges of long electrodes with dual thermocouples reduce impedance rises and coagulum adherence compared to a single centered thermistor during radiofrequency ablation in a canine model of atrial fibrillation?
Population
16 dogs with atrial fibrillation undergoing left and right atrial ablation, alongside a finite element model.
Comparison
Radiofrequency ablation using catheters with… vs Radiofrequency ablation using catheters with…
Design
Preclinical
Authors
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May inform long-electrode design for AF ablation; leaves open clinical validation in humans.
Does monitoring temperature at the edges of long electrodes with dual thermocouples reduce impedance rises and coagulum adherence compared to a single centered thermistor during radiofrequency ablation in a canine model of atrial fibrillation?
Absolute Event Rate: 2.1% vs 44.6%
p-value: p=<.0001
In a canine model of atrial fibrillation ablation, monitoring temperatures at the edges of long electrodes with dual thermocouples significantly reduced impedance rises and coagulum adherence compared to a single centered thermistor.
McRury et al. (1997) studied Atrial fibrillation (n=16). Dual thermocouple electrodes vs. Single centered thermistor electrodes was evaluated on Impedance rises per lesion (p=<.0001). Radiofrequency ablation using dual thermocouple electrodes at the edges significantly reduced impedance rises (2.1% vs 44.6%; P<0.0001) compared to single centered thermistor electrodes.