Abstract
Aims
Cryoballoon technology is a promising technique in paroxysmal atrial fibrillation (AF) ablation. However, success rates in patients with persistent AF have not been convincing. There is a trend toward performing more extensive procedures that are referred to as ‘pulmonary vein isolation plus.’ To combine pulmonary vein isolation (PVI) and antral substrate modification, we used both the 23-mm and 28-mm cryoballoon in a single approach in patients with persistent AF.
Methods and results
33 consecutive patients (26 men, age 60 ± 10 years, LA size 44 ± 5 mm) with persistent AF were prospectively included. All patients underwent the “double balloon strategy:” at least two applications at each pulmonary vein (PV) using the smaller 23-mm balloon to isolate the PV at the ostial level plus at least one additional freeze by the 28-mm balloon at the wide PV antral level. 7-day Holter monitors were performed during follow-up at 1, 3, 6, 9, 12, 18 and 24 months post-ablation. 131 of 133 PVs were targeted and isolated (98.4 %). A mean of 14 ± 2 cryoballoon applications per patient or 3.5 ± 1.5 applications per vein were performed. After a single procedure and mean follow-up of 15 ± 3 months, 69.7 % of patients remained in sinus rhythm (3-month blanking period). There were no major complications.
Conclusions
In persistent AF, the “double balloon strategy;” combining the small and large cryoballoon allowed ostial PV isolation followed by antral cryoablation is feasible, safe and associated with a favorable outcome.
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Abbreviations
- AF:
-
Atrial fibrillation
- PV:
-
Pulmonary vein
- PVI:
-
Pulmonary vein isolation
- LA:
-
Left atrium
- LSPV:
-
Left superior pulmonary vein
- LIPV:
-
Left inferior pulmonary vein
- RSPV:
-
Right superior pulmonary vein
- RIPV:
-
Right inferior pulmonary vein
- SD:
-
Standard deviation
- ICE:
-
Intracardiac echocardiography
- PNP:
-
Phrenic nerve palsy
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Schmidt, M., Dorwarth, U., Straube, F. et al. A novel double cryoballoon strategy in persistent atrial fibrillation: a pilot study. Clin Res Cardiol 101, 777–785 (2012). https://doi.org/10.1007/s00392-012-0456-y
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DOI: https://doi.org/10.1007/s00392-012-0456-y