![]() The prognosis for these patients is often unfavorable. The chance of a subsequent stroke after an acute transient ischemic attack (TIA) or minor stroke is high 1–7 with a 90-day risk between 10% and 20%. A low risk of recurrence was found in patients with classical TIA and those with no neurological deficits on initial assessment. All clinical categories of patient (TIA, stroke, NIHSS=0) accumulated silent lesions on MRI.Ĭonclusions- Most events were classified as stroke progression or infarct growth rather than a recurrent stroke. Patients with an NIHSS=0 in the ED, had an intermediate event rate (6.6%) between TIA (classical – 1.1%) and NIHSS >0 (14.4% χ 2 test for trend, P=0.02). We found a low risk of recurrent stroke among classical definition TIA patients (1.1%). 18/20 (90%) symptomatic events were associated with progression of presenting symptoms, compared to 2/20 (10%) with a clear recurrent stroke distinct from the original event. ![]() Results- Overall there were 38 events in 36 patients (20% event rate) 20 were symptomatic and 18 were silent (only evident because of the follow up MRI). ![]() Subgroups of patients analyzed included classical TIA, patients with NIHSS=0, and patients with NIHSS >0 in ED. Any neurological deterioration was recorded, and a combination of clinical and MRI factors were used to create a combined event classification. Methods- One hundred and eighty patients with TIA or minor stroke were examined within 12 hours and underwent brain MRI within 24 hours. We sought to evaluate the type of recurrent events and to identify which subsets of patients are at risk for recurrent events. Clinical trials are needed to assess acute treatment options in these patients.
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