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Brain and Abdominal Aneurysm Study (BAAS)

This study is ongoing, but not recruiting participants.
Information provided by (Responsible Party):
James F. Meschia, Mayo Clinic Identifier:
First received: August 15, 2011
Last updated: December 31, 2015
Last verified: December 2015

Aneurysmal subarachnoid hemorrhage (aSAH) is the most deadly kind of stroke. Each year, 40,000 Americans have SAH. Case-fatality approaches 60% and more than half of those who die do so before reaching the hospital. Most commonly, SAH results from rupture of an intracranial aneurysm. Screening high-risk individuals could identify those at greatest risk and decrease the devastating effect of SAH. Aortic Aneurysm also constitutes a major public health problem with high lethality. Current estimates are that ruptured aortic aneurysm kills 13,000 Americans each year. Screening efforts have effectively lowered mortality from aortic aneurysm rupture but a high proportion of those who die did not have a diagnosis of aortic aneurysm prior to rupture.

The relationship between intracranial and aortic aneurysm has long been recognized, but poorly quantified. Recent genome-wide association studies (GWAS) provide a molecular biological evidence for a shared pathophysiology. The chromosome 9p21 locus confers increased risk for both intracranial aneurysms and aortic aneurysms. These GWAS data, along with linkage data for other susceptibility loci, indicate that individuals and families harboring one type of aneurysm may be at especially increased risk of the other.

The rationale for this project is that opportunistic screening for abdominal aortic aneurysms (AAA) may be warranted in patients who present with aneurysmal subarachnoid hemorrhage. This study is meant to see if the yield of screening in this population is too low to justify its routine use. The investigators plan to systematically screen for AAA in all cases of aSAH presenting to MCH for treatment. If no individual out of 81 consecutively screened cases of aSAH has evidence of AAA, then the investigators can have strong confidence that there is a less than 5% chance of finding an AAA in the patient population.


Study Type: Observational
Study Design: Observational Model: Case-Only
Time Perspective: Prospective
Official Title: Brain and Abdominal Aneurysm Study (BAAS)

Resource links provided by NLM:

Further study details as provided by Mayo Clinic:

Primary Outcome Measures:
  • Prevalence [ Time Frame: day 1 ]
    The primary aim is to determine the proportion of patients who are found to have an AAA at the time of enrollment.

Secondary Outcome Measures:
  • Assessment of functional outcomes at 30 days [ Time Frame: 30days ]
    Functional outcomes will be assessed via telephone at one month post hospital discharge

Estimated Enrollment: 81
Study Start Date: August 2011
Estimated Study Completion Date: December 2024
Primary Completion Date: February 2014 (Final data collection date for primary outcome measure)

Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
We will enroll 81 patients who present to MCH with aSAH.
  1. Men and women age ≥ 18 years.
  2. Diagnosis of intracranial aneurysm secured by magnetic resonance angiography (MRA), computed tomographic angiography (CTA), or catheter-based cerebral angiography.
  3. Diagnosis of subarachnoid hemorrhage diagnosed by head CT, brain MRI or lumbar puncture.
  4. Provides written informed consent.
  5. No know diagnosis of aortic aneurysm
  6. No history of prior screening for aortic aneurysm
  7. No condition like recent abdominal surgical scar that would preclude abdominal ultrasonography
  8. No therapy like abdominal hypothermia pads that would preclude abdominal ultrasonography
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Please refer to this study by its identifier: NCT01420991

United States, Florida
Mayo Clinic in Florida
Jacksonville, Florida, United States, 32224
Sponsors and Collaborators
Mayo Clinic
Principal Investigator: James Meschia, MD Mayo Clinic
  More Information

Responsible Party: James F. Meschia, MD, Mayo Clinic Identifier: NCT01420991     History of Changes
Other Study ID Numbers: 11-003509
Study First Received: August 15, 2011
Last Updated: December 31, 2015

Additional relevant MeSH terms:
Aortic Aneurysm, Abdominal
Vascular Diseases
Cardiovascular Diseases
Aortic Aneurysm
Aortic Diseases processed this record on April 26, 2017