POLARx™

Cryoablation System

Clinical evidence

Numerous studies have demonstrated the safety and efficacy of the POLARx™ Cryoablation System in the treatment of paroxysmal atrial fibrillation. It has been studied and is in use in multiple countries across the globe.

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FROzEN-AF US IDE Clinical Trial

In a global, prospective, single-arm study, researchers evaluated the safety and effectiveness of the POLARx™ Cryoablation System for treatment of symptomatic, drug refractory, recurrent, paroxysmal atrial fibrillation (PAF). At 12 months, data revealed a 96.0%^† freedom from primary safety events (100% for the POLARx™ FIT 6-month extension arm study) and a 79.9% freedom from atrial arrhythmias (88% in the FIT extension study). The findings also point to an increase in Grade 4 occlusions and in successful single-shot therapy with POLARx FIT at 31 mm cryoballoon expansion.¹

Mean ± SD
*Only ablations with duration >60S included in ablation counts

Six-month data on POLARx™ FIT showed low arrhythmia recurrence and freedom from primary safety events, with a high rate of Grade 3 or 4 occlusions achieved.¹

Freedom from atrial arrhythmias

at follow-up (6 months) after using POLARx FIT

Major adverse events

including esophageal fistulas, persistent phrenic nerve palsy and PV stenosis

High-grade occlusion rate

resulting in either Grade 3 or Grade 4 occlusion level

POLAR ICE multicenter study

In a prospective, nonrandomized study conducted from 2020–2023 in multiple experienced European centers, researchers using the POLARx™ Cryoablation System for pulmonary vein isolation found the device to be effective, safe and efficient.²

Safety

Procedural characteristics

Performance and biophysical characteristics

ANTARCTICA observational study

In a multicenter prospective assessment of the POLARx™ system's efficacy and safety for PVI in an early-adopter setting of acute efficacy and safety, researchers found that use of POLARx™ resulted in a high rate of real-time pulmonary vein isolation (PVI) visualization and durable lesion creation. Following a short 25-patient learning curve, experienced operators also incurred significantly fewer adverse safety events.³

Acute PV isolation

Real-time PVI visualization

Freedom from recurrence

at 226 ± 150 days

Performance vs. existing cyroablation systems

In a propensity score-matched comparison (covarying in age, gender, CHA₂DS₂VASc and left atrial dilation) between POLARx™ and Arctic Front Advance™ Pro, POLARx™ demonstrated significantly lower procedure time and greater visualization of time-to-isolation.⁴

Faster procedure time

vs. Arctic Front Advance
(61 min. vs 73 min.)

Faster to -40˚C

vs. Arctic Front Advance
(30 min. vs 48 min.)

Greater real-time isolation rate

vs. Arctic Front Advance
(70% vs 84%)

Procedural characteristics

Studies comparing POLARx™ and other cryoablation systems

Multi-center	Single-center
Imnadze et al. (2022) >	Creta et al. (2021) >
Guckel et al. (2022) >	Kochi et al. (2021) >
Yap et al. (2021) >	Tilz et al. (2021) >
	Mojica et al. (2021) >

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Continue exploring POLARx technology on EDUCARE, Boston Scientific’s online medical education platform.

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References:

1. Ellenbogen, et al. One-year outcomes of pulmonary vein isolation with a novel cryoballoon in 325 patients: primary results of the FROzEN-AF trial. Presented at: Heart Rhythm Society 2023; May 19-21, 2023; New Orleans, LA, USA.
2. Tilz R et al. Acute procedural characteristics, efficacy and safety of a novel cryoballoon for the tratement of aparoxysmal atrial fibrillation: Results from the POLAR-ICE study. EP Europace. 24:1, May 2022. doi.org/10.1093/europace/euac053.079
3. Heeger CH, Pott A, Sohns C, et al. Novel cryoballoon ablation system for pulmonary vein isolation: multicenter assessment of efficacy and safety-ANTARCTICA study. Europace. 2022 Dec 9;24(12):1917-25
4. Mojica J, Lipartiti F, Al Housari M, et al. Procedural safety and efficacy for pulmonary vein isolation with the novel POLARx™ Cryoablation System: A propensity score matched comparison with the Arctic Front™ Cryoballoon in the setting of paroxysmal atrial fibrillation. J Atr Fibrillation. 2021 Jun 30;14(1):20200455.

† Updated analysis with corrected data.

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