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Caution: The Affera™ ablation system and Sphere-9™ catheter are not approved by the FDA and not for sale in the U.S. The Sphere-360™ catheter is investigational and not for sale in any geography.
SPHERE Per-AF was a randomized controlled trial (RCT) comparing the Affera™ mapping and ablation system with Sphere-9™ catheter to the CARTO®* navigation and mapping system with THERMOCOOL SMARTTOUCH®* SF (STSF) catheter for the treatment of drug-refractory patients with
. All 420 primary analysis patients received PVI and additional linear lesions were permitted in order to treat documented macro reentrant tachycardias.1.4% primary safety events†
vs. 1% primary safety events
in STSF procedures
73.8% primary effectiveness‡
vs. 65.8% primary effectiveness
with STSF
† For a full list of safety events, review the SPHERE-AF manuscript.
‡ Primary effectiveness endpoint definition: The primary effectiveness endpoint was acute procedure failure, repeat ablation at any time, or after three months: recurrence of AF/AFL/AT, cardioversion, or new/re-initiated/increased AAD usage.
Patients treated with the Sphere-9™ catheter observed less recurrence of AF, AT, and AFL throughout the 12-month follow-up period as seen in the Kaplan-Meier curve.
This was a prospective, single-arm, multicenter clinical series of the Sphere-360™ conformable single-shot pulsed field ablation catheter for pulmonary vein isolation to treat AF. The study included symptomatic drug refractory PAF patients (n = 85) and evaluated safety, efficacy, and durability.
Lesion durability demonstrated by invasive remapping 75 days post-ablation
35 patients were treated with the PULSE3 optimized and most recent pulse configuration; 26 subjects completed the optional remapping procedure.
0
primary adverse events
§ See manuscript for full listing of safety events and procedural characteristics.
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• Expandable lattice electrode ablation catheter; Barkagan, et al. 2019.
• Novel irrigated temperature-controlled lattice ablation catheter for ventricular ablation; Shapira-Daniels, et al. 2019.
• Feasibility, safety, and durability of porcine atrial ablation using a lattice-tip temperature-controlled radiofrequency ablation catheter; Koruth, et al. 2020.
• Focal pulsed field ablation for pulmonary vein isolation and linear atrial lesions; Koruth, et al. 2020.
• Pulsed-field ablation in ventricular myocardium using a focal catheter; Yavin, et al. 2021.
®* Third-party brands are trademarks of their respective owners. All other brands are trademarks of a Medtronic company.
1. Anter E, Mansour M, Nair DG, et al. Dual-energy lattice-tip ablation system for persistent atrial fibrillation: a randomized trial. Nat Med. 2024. doi: 10.1038/s41591-024-03022-6.
2. Reddy V, Anter E, Peichl P, et al. First-in-human clinical series of a novel conformable large-lattice pulsed field ablation catheter for pulmonary vein isolation. EP Europace. 2024;26(4):euae090. doi: 10.1093/europace/euae090.