Key result
Cryoablation for high-risk-located atrial tachycardia achieved an acute success rate of 96% and a long-term success rate of 92%, proving to be a safe and effective alternative to RF therapy.
Why the study?
Does cryoablation provide a safe and effective treatment in patients with high-risk-located atrial tachycardia?
Observational (n=26)
No
Does cryoablation provide a safe and effective treatment in patients with high-risk-located atrial tachycardia?
Cryoablation is a safe and effective alternative to radiofrequency ablation for high-risk-located atrial tachycardia, offering high success rates with reversible complications.
Answers are grounded in this paper and cite their sources.
Supports cryoablation consideration for high-risk atrial tachycardia; leaves open need for randomized comparisons to radiofrequency ablation.
AIMS: The purpose of this study was to evaluate the safety and efficacy of cryoablation as an alternative to radio frequency (RF) ablation in high-risk-located atrial tachycardia (AT). METHODS AND RESULTS: Between 2004 and 2007, 164 patients underwent catheter ablation due to AT at our institution. Twenty-six of these patients (22 women and 4 men), median age 58 years (range 14-76), were considered having high-risk-located AT and were treated by cryoablation. Seven patients had failed prior RF ablation due to high risk of complications. The AT foci distribution was: close to the AV node (n = 14), vicinity of the sinus node (n = 7), and crista terminalis adjacent to the phrenic nerve (n = 5). Cryomapping, using a 6 mm tip catheter, at -30 degrees C was performed before ablation with a goal temperature of -80 degrees C for 240 s. Acute success rate was achieved in 25/26 patients (96%). During a follow-up of 493 +/- 258 days, three patients had recurrences. Two of these underwent a second successful cryoablation procedure. Long-term success rate was 92%. Phrenic nerve palsy occurred in two patients with complete recovery after 1 day and 5 months, respectively. CONCLUSION: Cryoablation of high-risk-located AT foci is a safe and effective alternative to RF therapy.
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Bastani et al. (2009) conducted an observational in High-risk-located atrial tachycardia (n=26). Cryoablation was evaluated on Acute success rate. Cryoablation for high-risk-located atrial tachycardia achieved an acute success rate of 96% and a long-term success rate of 92%, proving to be a safe and effective alternative to RF therapy.
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