Background:
Recrudescence
of old stroke deficits (ROSD) is a reported cause of transient
neurological symptoms, but it is not well characterized.
Objective:
We
sought to determine the prevalence, potential triggers, and clinical
outcome of ROSD in a cohort of patients presenting with acute transient
neurological attack (TNA) and absent acute pathology on brain imaging.
Methods:
We
retrospectively analyzed 340 consecutive patients who presented with
TNA and no acute pathology on brain imaging that were included in an
institutional stroke registry between February 2013 and April 2015. The
presumed TNA cause was categorized as transient ischemic attack (TIA),
ROSD, and other cause. Baseline characteristics, triggers,
cardiovascular complications within 90 days, and death were recorded.
Results:
The
prevalence of ROSD in the studied cohort was 10% (34/340). Infectious
stressors and acute metabolite derangements were more common in ROSD
compared to TIA (
P < .05, each). Compared to TIA and the other TNA, ROSD was more likely to have more than 1 acute stressor (
P < .001). Patients with ROSD had similar vascular risk factors compared to TIA (
P
>> .05), including hypertension, diabetes mellitus, peripheral
vascular disease, hyperlipidemia, and similarly used HMG-CoA reductase
inhibitor, antihypertensive, and antiplatelet medications. Among the
patients with an available 90-day follow-up (n = 233), cardiovascular
events were more frequent in the TIA group as compared to other TNA (
P < .05).
Conclusion:
ROSD
is common and distinct from TIA and is associated with a triggering
physiologic reaction leading to transient reemergence of prior
neurologic deficits. Further study of the mechanism of this phenomenon
is needed to help better identify these patients.
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