Key result
A 0.6-W test pulse prior to radiofrequency ablation predicted lesion size, with a high temperature rise indicating a small lesion in temperature-controlled mode (P<0.0001).
Why the study?
Does a low power test pulse prior to radiofrequency ablation predict lesion size in an in vitro porcine myocardium model?
Population
In vitro strips of left ventricular porcine myocardium
Design
Preclinical
Authors
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Hypothesis-generating for contact assessment in ablation; leaves open clinical translation pending in vivo validation.
Does a low power test pulse prior to radiofrequency ablation predict lesion size in an in vitro porcine myocardium model?
p-value: p=<0.001
A low power test pulse can predict radiofrequency ablation lesion size, though the interpretation of the temperature rise depends on whether temperature-controlled or power-controlled ablation is used.
Petersen et al. (2003) studied Radiofrequency ablation (in vitro). Low power test pulse prior to radiofrequency ablation was evaluated on Increase in tip temperature (DeltaT) and lesion size (p=<0.001). A 0.6-W test pulse prior to radiofrequency ablation predicted lesion size, with a high temperature rise indicating a small lesion in temperature-controlled mode (P<0.0001).
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