COMPARATIVE STUDY
JOURNAL ARTICLE

Efficacy of pulmonary vein isolation by cryoballoon ablation in patients with paroxysmal atrial fibrillation

Gunnar Klein, Hanno Oswald, Ajmal Gardiwal, Ulrich Lüsebrink, Christoph Lissel, Hong Yu, Helmut Drexler
Heart Rhythm: the Official Journal of the Heart Rhythm Society 2008, 5 (6): 802-6
18534363

BACKGROUND: Radiofrequency ablation of pulmonary veins (PVs) has emerged as an effective treatment for patients with paroxysmal atrial fibrillation (AF). However, serious complications raise concern about an even wider application. In terms of safety, cryoenergy has advantages compared with radiofrequency. A new cryoenergy balloon catheter has been recently developed to make AF ablation shorter and safer.

OBJECTIVE: The purpose of this study was to test the 6-month efficacy of this new device for ablation of paroxysmal AF.

METHODS: Twenty-one patients with highly symptomatic paroxysmal AF, normal left atrial size, and frequent episodes of AF were included. All PVs were targeted during cryoballoon ablation. Patients received 24-hour Holter electrocardiograms (ECGs) and event recorder during follow-up after 1, 3, and 6 months.

RESULTS: A total of 81 (95%) of 85 PVs could be completely isolated with a single-balloon technique. Procedure time was 165 +/- 35 minutes, and fluoroscopy time was 39 +/- 9 minutes. After 6 months, 86% of the patients were free of symptomatic AF. In two of three patients with recurrence of AF, complete PV isolation has not been achieved initially. After a second procedure (1.04 procedures per patient), 90% of the patients were free of symptomatic AF. Three phrenic nerve palsies occurred during ablation of the right superior PV; two completely resolved after 6 and 9 months, and one is still persisting after 2 months.

CONCLUSION: This is the first study that reports the results of the new cryoballoon AF ablation approach showing 86% freedom from AF recurrence after 6 months. Cryoballoon PV ablation promises to be effective for patients with paroxysmal AF and normally sized left atria.

Full Text Links

Find Full Text Links for this Article

Discussion

You are not logged in. Sign Up or Log In to join the discussion.

Related Papers

Remove bar
Read by QxMD icon Read
18534363
×

Save your favorite articles in one place with a free QxMD account.

×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"