CT/CT Angiography and MRI Findings Predict Recurrent Stroke After Transient Ischemic Attack and Minor Stroke

Therapies Friday, February 10th, 2012

Results of the Prospective CATCH Study

  1. Shelagh B. Coutts, MD;
  2. Jayesh Modi, MD;
  3. Shiel K. Patel, BSc;
  4. Andrew M. Demchuk, MD;
  5. Mayank Goyal, MD;
  6. Michael D. Hill, MD
  7. for the Calgary Stroke Program
Correspondence to Shelagh B. Coutts, MD, Foothills Hospital, C1261, 1403 29th Street NW, Calgary, Alberta, T2N 2T9, Canada. E-mail scoutts@ucalgary.ca

Abstract

Background and Purpose—Transient ischemic attack and minor stroke portend a substantial risk of recurrent stroke. MRI can identify patients at high risk for a recurrent stroke. However, MRI is not commonly available as an emergency. If similarly clinically predictive, a CT/CT angiographic (CTA) imaging strategy would be more widely applicable.

Methods—Five hundred ten patients with consecutive transient ischemic attack and minor stroke underwent CT/CTA and subsequent MRI. We assessed the risk of recurrent stroke within 90 days using standard clinical variables and predefined abnormalities on the CT/CTA (acute ischemia on CT and/or intracranial or extracranial occlusion or stenosis ≥50%) and MRI (diffusion-weighted imaging-positive). Read Full Article

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