Key result
Unipolar voltages were significantly greater than bipolar voltages (P<0.001), but only bipolar recordings allowed voltage-based scar tissue delineation using a 0.1 mV cutoff.
Why the study?
Does the recording technique (unipolar vs bipolar) impact voltage distribution and the ability to delineate scar tissue in patients undergoing RFCA?
Observational (n=44)
Does the recording technique (unipolar vs bipolar) impact voltage distribution and the ability to delineate scar tissue in patients undergoing RFCA?
p-value: p=<0.001
Bipolar recordings, but not unipolar recordings, allow for voltage-based scar tissue delineation (using a ≤0.1 mV cutoff) in patients undergoing radiofrequency catheter ablation.
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Bipolar voltage mapping may guide scar delineation in RFCA; cohort data leaves open unipolar thresholds for clinical protocols.
Groot et al. (2003) conducted an observational in Atrial flutter, focal atrial tachycardia, AV nodal reentrant tachycardia, or scar-related atrial reentrant tachycardia (n=44). Unipolar and bipolar voltage and activation mapping was evaluated on Voltage differences between unipolar and bipolar recordings (p=<0.001). Unipolar voltages were significantly greater than bipolar voltages (P<0.001), but only bipolar recordings allowed voltage-based scar tissue delineation using a 0.1 mV cutoff.
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