Stroke Research Today is a free monthly online journal that collates and summarizes the latest research about Stroke, including details on treatment, recovery, rehabilitation, signs, symptoms.

Aortic arch atheroma progression and recurrent vascular events in patients with stroke or transient ischemic attack.

Sen S, Hinderliter A, Sen PK, Simmons J, Beck J, Offenbacher S, Ohman EM, Oppenheimer SM

Department of Neurology, University of North Carolina, Chapel Hill, USA. SenS@neurology.unc.edu

BACKGROUND: It is not known whether progression of aortic arch (AA) atheroma is associated with vascular events in patients with stroke or transient ischemic attack (TIA). METHODS AND RESULTS: AA atheroma was detected on baseline transesophageal echocardiogram in 167 consecutive patients who had prevalent stroke or TIA. Of these, 125 consented to a follow-up transesophageal echocardiogram at 12 months. Adequate paired AA images were obtained in 117 (78 with strokes, 39 with TIAs), which allowed detailed measurements of plaques. On admission for their index stroke or TIA, patients were assessed for stroke risk factors, stroke subtypes, baseline AA plaque characteristics, and laboratory parameters. Progression of AA atheroma was observed in 33 patients (28%) on 12-month follow-up transesophageal echocardiogram. It was determined that the progression group had significantly higher adjusted homocysteine levels (P<0.0001) and neutrophil counts (P<0.0001) than the no-progression group. These patients were followed up for a median of 1.7 years from the index stroke/TIA (range 0.5 to 4.5 years) for vascular events including stroke, TIA, myocardial infarction, and death due to vascular causes. Kaplan-Meier curves showed fewer patients with AA atheroma progression remained free of the composite vascular end point (49% compared with 89% in the no-progression group; P<0.0001). AA atheroma progression was associated with composite vascular events (hazard ratio 5.8, 95% confidence interval 2.3 to 14.5, P=0.0002) after adjustment for a propensity score based on confounders. CONCLUSIONS: In this preliminary study of stroke/TIA patients with AA atheroma on transesophageal echocardiogram, AA atheroma progression was associated with recurrent vascular events.

Published 21 August 2007 in Circulation, 116(8): 928-35.
Full-text of this article is available online (may require subscription).

© 2004-2008 Stroke Research Today. All Rights Reserved.