Abstract
Background and Purpose:
With
the spread of coronavirus disease 2019 (COVID-19) during the current
worldwide pandemic, there is mounting evidence that patients affected by
the illness may develop clinically significant coagulopathy with
thromboembolic complications including ischemic stroke. However, there
is limited data on the clinical characteristics, stroke mechanism, and
outcomes of patients who have a stroke and COVID-19.
Methods:
We
conducted a retrospective cohort study of consecutive patients with
ischemic stroke who were hospitalized between March 15, 2020, and April
19, 2020, within a major health system in New York, the current global
epicenter of the pandemic. We compared the clinical characteristics of
stroke patients with a concurrent diagnosis of COVID-19 to stroke
patients without COVID-19 (contemporary controls). In addition, we
compared patients to a historical cohort of patients with ischemic
stroke discharged from our hospital system between March 15, 2019, and
April 15, 2019 (historical controls).
Results:
During
the study period in 2020, out of 3556 hospitalized patients with
diagnosis of COVID-19 infection, 32 patients (0.9%) had imaging proven
ischemic stroke. Cryptogenic stroke was more common in patients with
COVID-19 (65.6%) as compared to contemporary controls (30.4%, P=0.003) and historical controls (25.0%, P<0.001).
When compared with contemporary controls, COVID-19 positive patients
had higher admission National Institutes of Health Stroke Scale score
and higher peak D-dimer levels. When compared with historical controls,
COVID-19 positive patients were more likely to be younger men with
elevated troponin, higher admission National Institutes of Health Stroke
Scale score, and higher erythrocyte sedimentation rate. Patients with
COVID-19 and stroke had significantly higher mortality than historical
and contemporary controls.
Conclusions:
We
observed a low rate of imaging-confirmed ischemic stroke in
hospitalized patients with COVID-19. Most strokes were cryptogenic,
possibly related to an acquired hypercoagulability, and mortality was
increased. Studies are needed to determine the utility of therapeutic
anticoagulation for stroke and other thrombotic event prevention in
patients with COVID-19.
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