Limitations
We admit some potential limitations in the current study. The first
limitation was that the period of patient enrollment was long, and it
was a single center study. The second limitation was the relatively
small population. The third limitation was inconsistencies in the
detection of RR-NSVT as heterogeneous brands of ICD/CRT-D were used.
Nonetheless, in our study, RR-NSVT documentation in ICD/CRT-D was
important for the prediction of future sustained VTA occurrence in DCM
patients. This finding calls for a large registry to detect patients
with cluster or frequent RR-NSVTs and analyze treatment and preventive
strategies for future VTAs in a similar population.