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CT Based Definition of a Tissue Window for Acute Stroke Thrombolysis (CT-DEFINE)

This study has been completed.
ClinicalTrials.gov Identifier:
First Posted: April 20, 2007
Last Update Posted: May 14, 2009
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Information provided by:
Technische Universität Dresden

Aim of this study is to define a CT-based "tissue window" for stroke thrombolysis. Our primary hypothesis is that

  1. patients with a "tissue window" (favourable non-contrast CT (NCCT) scan and an intracranial occlusion on CT angiography (CTA) or perfusion-CT-mismatch" (area of reduced cerebral blood flow (CBF) > area of reduced cerebral blood volume (CBV)) represent a significant proportion (> 20%)of acute stroke patients and therefore are an important target group for future interventional studies
  2. patients with a "tissue window" suffer an unfavourable outcome (> 50 % mRS =>4 at 3 months)if the occluded artery was not recanalized.


Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Prospective
Official Title: Observational Study of Multimodal CT in Acute Ischemic Stroke to Define a Tissue Window for Thrombolysis

Further study details as provided by Technische Universität Dresden:

Primary Outcome Measures:
  • modified Rankin Scale scores 0-2 [ Time Frame: 90 days ]

Estimated Enrollment: 100
Study Start Date: January 2007
Study Completion Date: January 2009
Primary Completion Date: January 2008 (Final data collection date for primary outcome measure)

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Probability Sample
Study Population
Ischemic stroke patients presenting within 12 hrs from symptom onset

Inclusion Criteria:

  • ischemic anterior circulation stroke
  • last seen normal < 12 hours
  • stroke severity => 3 on the National Institute of Health Stroke Scale
  • multimodal CT stroke protocol performed
  • informed consent obtained

Exclusion Criteria:

  • premorbid modified Rankin Scale score > 3
  • contraindications to contrast media application
  • pregnancy or breast feeding
  • subacute stroke > 50 % of MCA territory
  • CT evidence of non-vascular cause of stroke symptoms
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00463281

University of Dresden, Dept of Neurology
Dresden, Germany, 01307
Sponsors and Collaborators
Technische Universität Dresden
Principal Investigator: Imanuel Dzialowski, MD University of Dresden, Dept of Neurology
  More Information

Responsible Party: Imanuel Dzialowski, MD, University of Dresden
ClinicalTrials.gov Identifier: NCT00463281     History of Changes
Other Study ID Numbers: 23211204
First Submitted: April 19, 2007
First Posted: April 20, 2007
Last Update Posted: May 14, 2009
Last Verified: January 2009

Keywords provided by Technische Universität Dresden:
stroke, ischemic
computed tomography

Additional relevant MeSH terms:
Cerebrovascular Disorders
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Vascular Diseases
Cardiovascular Diseases