Symptomatic intracerebral hemorrhage among eligible warfarin-treated patients receiving intravenous tissue plasminogen activator for acute ischemic stroke

Shyam Prabhakaran*, Juan Rivolta, Julio R. Vieira, Fred Rincon, Joshua Stillman, Randolph S. Marshall, Ji Y. Chong

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

68 Scopus citations

Abstract

Objective: To determine whether warfarin-treated patients with an international normalized ratio less than 1.7 who receive intravenous tissue plasminogen activator for acute ischemic stroke are at increased risk for symptomatic intracerebral hemorrhage. Design: Retrospective study. Setting: Academic hospital. Patients: Consecutive patients with acute ischemic stroke who are treated with intravenous tissue plasminogen activator. Main Outcome Measure: Symptomatic intracerebral hemorrhage. Results: One hundred seven patients were included (mean age, 69.2 years; 43.9% men; median National Institutes of Health Stroke Scale score, 14; median onsetto-treatment time, 140 minutes; baseline warfarin use, 12.1%). The median international normalized ratio was 1.04 (range, 0.82-1.61). The overall rate of symptomatic intracerebral hemorrhage was 6.5%, but it was nearly 10-fold higher among patients taking warfarin compared with those not taking warfarin at baseline (30.8% vs 3.2%, respectively; P=.004). Baseline warfarin use remained strongly associated with symptomatic intracerebral hemorrhage (P=.004) after adjusting for relevant covariates, including age, atrial fibrillation, National Institutes of Health Stroke Scale score, and international normalized ratio. Conclusions: Despite an international normalized ratio less than 1.7, warfarin-treated patients are more likely than those not taking warfarin to experience symptomatic intracerebral hemorrhage following treatment with intravenous tissue plasminogen activator. Larger studies in this subgroup are warranted.

Original languageEnglish (US)
Pages (from-to)559-563
Number of pages5
JournalArchives of Neurology
Volume67
Issue number5
DOIs
StatePublished - May 2010

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Clinical Neurology

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