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Transient Ischemic Attack (TIA) Triage and Evaluation of Stroke Risk

This study is ongoing, but not recruiting participants.
Diadexus, Inc.
University of California, Davis
Information provided by (Responsible Party):
Gregory W Albers, Stanford University Identifier:
First received: August 16, 2011
Last updated: April 26, 2017
Last verified: April 2017

Transient ischemic attack (TIA) is a transient neurological deficit (speech disturbance, weakness…), caused by temporary occlusion of a brain vessel by a blood clot that leaves no lasting effect.

TIA diagnosis can be challenging and an expert stroke evaluation combined with magnetic resonance imaging (MRI) could improve the diagnosis accuracy.

The risk of a debilitating stroke can be as high as 5% during the first 72 hrs after TIA.

TIA characteristics (duration, type of symptoms, age of the patient), the presence of a significant narrowing of the neck vessels responsible for the patient's symptoms (symptomatic stenosis), and an abnormal MRI are associated with an increased risk of stroke.

An emergent evaluation and treatment of TIA patients by a stroke specialist could reduce the risk of stroke to 2%.

Stanford has implemented an expedited triage pathway for TIA patients combining a clinical evaluation by a stroke neurologist, an acute MRI of the brain and the vessels and a sampling of biomarkers (Lp-PLA2). The investigators are investigating the yield of this unique approach to improve TIA diagnosis, prognosis and secondary stroke prevention. The objective of this prospective cohort study is to determine which factors will help the physician to confirm the diagnosis of TIA and to define the risk of stroke after a TIA.

Cerebrovascular Accident

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Prospective
Official Title: TIA Triage Trial and Evaluation of Vascular-Specific Inflammatory BiomarkerLp-PLA2 as a Stratification Tool for TIA Triage and Stroke Risk

Resource links provided by NLM:

Further study details as provided by Stanford University:

Primary Outcome Measures:
  • vascular events [ Time Frame: 90 days ]

Secondary Outcome Measures:
  • Vascular Events [ Time Frame: 7 days ]
  • Vascular Events [ Time Frame: 1 year ]

Biospecimen Retention:   Samples Without DNA

First 100 cases:

2 tiger top or gold top tubes 2 lavender top tubes

  • Blood specimens should be inverted 10 times before processing.
  • Centrifuge and separate within four hours of venipuncture.
  • Transfer 1.0 ml into 2 transfer tubes

Freeze at -70 C

Additional 80 cases:

3 PAXgene tubes (total 16cc) - containing 7.5 cc preservative to stabilize RNA immediately.

Invert 20 times then sit at room temperature overnight Place into a -70C freezer until processed

2 tiger top or gold top tubes 2 lavender top tubes

  • Blood specimens should be inverted 10 times before processing.
  • Centrifuge and separate within four hours of venipuncture.
  • Transfer 1.0 ml into 2 transfer tubes

Freeze at -70 C

Enrollment: 262
Study Start Date: September 2010
Estimated Study Completion Date: January 2018
Estimated Primary Completion Date: December 31, 2017 (Final data collection date for primary outcome measure)
  Show Detailed Description


Ages Eligible for Study:   Child, Adult, Senior
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Probability Sample
Study Population
Patients admitted to the ED with symptoms of acute TIA

Inclusion Criteria:

  • Men and Women age greater than 18 year old
  • Symptoms suggestive of an acute TIA

Exclusion Criteria:

  • Patients with contraindication to brain imaging: MRI and CT.
  • Patient with persistent major deficit (NIHSS> or = 4)
  • Informed consent could not be obtained either directly from the patient or from legally authorized representative.
  • Severe coexisting or terminal systemic disease with like expectancy below 90 days or that may interfere with the conduct of the study.
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01423201

United States, California
UC Davis Medical Center
Davis, California, United States
Stanford University School of Medicine
Stanford, California, United States, 94305
United States, Michigan
Michigan State University
Grand Rapids, Michigan, United States, 49503
Sponsors and Collaborators
Stanford University
Diadexus, Inc.
University of California, Davis
Principal Investigator: Gregory W Albers Stanford University
  More Information

Responsible Party: Gregory W Albers, MD, Professor of Neurology, Stanford University Identifier: NCT01423201     History of Changes
Other Study ID Numbers: SU-08012011-8167
Study First Received: August 16, 2011
Last Updated: April 26, 2017

Keywords provided by Stanford University:

Additional relevant MeSH terms:
Ischemic Attack, Transient
Cerebrovascular Disorders
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Vascular Diseases
Cardiovascular Diseases
Brain Ischemia processed this record on May 24, 2017