Limitations
The non-randomized, single-center nature of the present study may limit
the generalizability of our findings. The consecutive nature of the
patients analyzed helps limit bias in the absence of randomization. All
cases were performed by one of 5 high-volume operators, and by the end
of the study period, all operators were routinely utilizing ICFS
catheters for all AVNRT ablation procedures. At our medical center,
increased utilization of a steerable sheath has paralleled increased
adoption of ICFS, thus some of the differences observed with ICFS may be
attributable the use of the steerable sheath. As AVNRT ablation
procedures tend to carry low complication rates, the study may not have
been sufficiently powered to evaluate risk of AV block.