Key result
Preoperative LAA velocity ≥40 cm/s predicts a 100% rate of long-term sinus rhythm maintenance.
Why the study?
Does preoperative left atrial appendage outflow velocity predict the long-term maintenance of sinus rhythm in patients with chronic atrial fibrillation undergoing pulmonary vein cryoablation during cardiac surgery?
Population
101 patients with a history of chronic atrial fibrillation undergoing simple cryoablation of pulmonary vein…
Design
Cohort
Follow-up
average 2.3 years
Authors
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May identify patients likely to maintain sinus rhythm post-cryoablation; leaves open prospective validation before guiding decisions.
Cohort (n=101)
No
Does preoperative left atrial appendage outflow velocity predict the long-term maintenance of sinus rhythm in patients with chronic atrial fibrillation undergoing pulmonary vein cryoablation during cardiac surgery?
Absolute Event Rate: 100% vs 80%
p-value: p=<0.05
Preoperative left atrial appendage outflow velocity is a strong predictor of long-term sinus rhythm maintenance after pulmonary vein cryoablation during cardiac surgery.
Isobe et al. (2005) conducted a cohort in Chronic atrial fibrillation (n=101). Preoperative left atrial appendage outflow velocity (LAA-V) ≥ 40 cm/s vs. LAA-V < 40 cm/s was evaluated on Maintenance of sinus rhythm long-term after hospital discharge (p=<0.05). Preoperative left atrial appendage outflow velocity of at least 40 cm/s was associated with a 100% rate of long-term sinus rhythm maintenance compared to 80% in those with lower velocities.
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