2.3 Definitions
Procedure-related ischemic complication was defined as any ischemic
stroke or transient ischemic attack (TIA) which occurred within 30 days
post-RFCA. Immediate procedure-related ischemic complication was defined
as ischemic stroke or TIA within 3 days post-RFCA.
Ischemic stroke was defined as any neurologic symptom that persisted for
more than 24 hours which could not be explained by other medical
conditions. Transient ischemic attack was defined as any neurologic
symptom that was not attributable to other medical cause, but resolved
completely within 24 hours. If acute infarction was observed on brain CT
or MRI, the event was classified as ischemic stroke despite complete
restoration of neurologic symptoms. Neurologists confirmed the final
diagnosis of ischemic stroke and TIA. Neurologic consequence of
procedure-related stroke was classified into three stages: (i) None: no
neurologic symptoms; (ii) Minimal: permanent neurologic symptoms which
does not limit normal daily life; (ii) Significant: permanent neurologic
symptoms which have significant limitation on normal daily life or
occupation.