This systematic review and meta-analysis combined data from randomized trials involving 1,149 adults undergoing their first-time atrial fibrillation ablation. The researchers compared adding adjunctive superior vena cava isolation to standard pulmonary vein isolation against pulmonary vein isolation alone.
The analysis showed that adding the extra isolation step reduced the risk of atrial tachyarrhythmia recurrence. This benefit was seen in the overall group and in specific subgroups, including those with paroxysmal atrial fibrillation and those treated with radiofrequency ablation.
However, the added procedure time and fluoroscopy time were associated with higher rates of minor complications. The rate of major complications remained comparable between the two approaches. Some patients experienced transient phrenic nerve injury or sinus node injury more often with the added step.
Readers should understand that while recurrence rates drop, the trade-off involves more frequent minor issues. This evidence comes from a meta-analysis of randomized trials, which provides a higher level of certainty than observational data, but individual results may vary.
