Limitations
Several limitations of our study warrant mention. First, although ECG
monitoring was performed for at least two days after the procedure, we
could not observe heart rate after discharge. Second, we were unable to
assess for mild DHF that did not require re-hospitalization, and the
indication for re-hospitalization due to DHF depended on the chief
doctor’s judgment. Third, the infusion volume in the peri-procedural
period and ablation procedure might have varied, even though we
attempted to standardize as far as possible. Fourth, we could not fully
eliminate confounding factors because this study was retrospective, and
there were therefore some differences in patient characteristics between
patients with DHF and those without. Finally, the number of cases of DHF
was small, weakening the statistical analysis.