Procedural Safety
There was no significant difference in the number of observed
complications between the SDD and ONS cohorts within 30 days after
hospital discharge following the cryoballoon ablation (Table
3). Patients who followed a SDD protocol suffered a total of 15
(1.26%) complications while patients who were observed during an ONS
had a total of 24 (2.03%) complications observed during the 30 day
follow-up (p=0.13) (Figure 1). Hematoma within the immediate
post-op period was the most common complication in both groups, which
accounted for almost half of the complications in both the SDD and ONS
cohorts (0.67% versus 0.93%, respectively). None of the complications
in the SDD group occurred during the first 24 hours after discharge from
the hospital; therefore, these events would not have been prevented by
monitoring during an overnight hospital stay.