Key result
Omnipolar mapping for SVC isolation matches conventional success with ~31% fewer RF applications.
Why the study?
Functional conduction block isolation of the SVC had not been compared with conventional circumferential ablation based on angiography.
Does omnipolar mapping technology improve procedural efficacy and safety compared to conventional methods in patients undergoing superior vena cava isolation?
RCT (n=62)
1:1
Does omnipolar mapping technology improve procedural efficacy and safety compared to conventional methods in patients undergoing superior vena cava isolation?
Omnipolar mapping technology for SVC isolation reduces radiofrequency applications, procedure time, and radiation dose compared to conventional angiography-guided ablation, while maintaining high acute success rates.
Omnipolar mapping reduces RF applications for SVC isolation with comparable success; extends RCT evidence for its procedural efficiency.
Background Successful isolation of the superior vena cava (SVC) using a functional conduction block between the right atrium (RA) and SVC has been documented. However, a comparison of this approach with the conventional method (CM) of circumferential ablation of the RA‐SVC junction, based on angiography, remains unexplored. Objective In this study, we employed the innovative omnipolar mapping technology (OT) to discern the RA‐SVC connection and compared clinical outcomes with those from CM. Methods Sixty‐two patients undergoing SVC isolation were randomly assigned in a 1:1 ratio to either the OT or CM group. No significant differences in the baseline characteristics were observed between the two groups. We assessed the efficacy and safety of both groups. Results Both groups showed comparable acute success rates (96%) in SVC isolation, but the procedure in the OT group required fewer radiofrequency (RF) applications (13.6 ± 6.0 vs. 19.8 ± 10.9, p = .046) and shorter procedure time (9.6 ± 6.8 min vs. 14.3 ± 6.8 min, p = .007). The overall absorbed dose was notably lower in the OT group (69.6 ± 47.6 mGy vs. 90.3 ± 30.3 mGy, p = .023). Conclusions The OT enhances the efficacy of SVC isolation, requiring fewer RF applications and reducing procedure time compared to conventional treatment methods.
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Oguri et al. (2025) conducted an RCT in superior vena cava (SVC) isolation (n=62). omnipolar mapping technology (OT) vs. conventional method (CM) of circumferential ablation was evaluated on acute success rates in SVC isolation. Omnipolar mapping technology for superior vena cava isolation achieved similar acute success (96%) to the conventional method but required fewer radiofrequency applications (13.6 vs 19.8, p=0.046).
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