This trial is active, not recruiting.

Condition aneurysm
Sponsor Mayo Clinic
Start date August 2011
End date February 2014
Trial size 81 participants
Trial identifier NCT01420991, 11-003509


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.

United States No locations recruiting
Other countries No locations recruiting

Study Design

Observational model case-only
Time perspective prospective

Primary Outcomes

time frame: day 1

Secondary Outcomes

Assessment of functional outcomes at 30 days
time frame: 30days

Eligibility Criteria

Male or female participants at least 18 years old.

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

Additional Information

Official title Brain and Abdominal Aneurysm Study (BAAS)
Principal investigator James Meschia, MD
Trial information was received from ClinicalTrials.gov and was last updated in December 2015.
Information provided to ClinicalTrials.gov by Mayo Clinic.