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Branched Aortic Arch Study

Official Title:

Branched Stent-Graft Repair for Endo Repair of Aneurysms Involving the Proximal Aortic Arch

Basic Trial Information

Phase Type Age Sponsor Protocol IDs Status
Phase 1/Phase 2 Interventional 18 Years and older University of California, San Francisco 10-03930
Enrolling patients

Study Design:

Principal Investigator

Professor of Surgery
Division of Vascular & Endovascular Surgery
Director, General Surgery Residency Program

Clinical Research Coordinator

UCSF Medical Center at Parnassus
415.353.4379 Phone
415.353.4370 Fax

Trial Summary

This is a study to assess the safety and effectiveness of endovascular treatment of aortic aneurysms involving the proximal aortic arch. The investigational operation involves placing a stent-graft over the aortic aneurysm.


Inclusion Criteria:
  • Aneurysm of the aortic arch larger than 6cm in diameter, or symptomatic aneurysm of
    the aortic arch, of any diameter, or any arch aneurysm with a 2-year rupture rate
    estimated to be more than 20%.
  • Anticipated mortality rate with open repair estimated to be more than 20%.
  • Suitable arterial anatomy for stent-graft
  • Life expectancy more than 2 years
  • Ability to give informed consent and willingness to comply with follow-up schedule
Exclusion Criteria:
  • Free rupture of the aneurysm
  • Pregnancy
  • Anaphylactic reaction to contrast material
  • Allergy to stainless steel or polyester
  • Unwillingness or inability to comply with the follow-up schedule
  • Serious systemic or groin infection
  • Uncorrectable coagulopathy
  • Significant presence of carotid artery atherosclerosis
  • Arrhythmia define as 2nd- and 3rd-degree atrioventricular block or sinus node disease,
    such as sick sinus syndrome and symptomatic bradycardia, unless the patient already
    has a pacemaker in place and cardiology consultation confirms that it is safe to

Detailed Description

An aneurysm is a localized bulge in the wall of an artery. Aneurysms of the aorta are prone
to progressive dilatation, which if left untreated ultimately results in rupture, internal
bleeding and death. Traditional open surgery involves aortic exposure through a long
incision, aortic clamping to interrupt blood flow, and replacement or repair of the dilated
aortic segment using a fabric conduit (graft), which is sutured (anastomosis) to the
nondilated arteries above and below the aneurysm. Some subjects are able to withstand such a
large operation better than others, but many suffer complications, and all suffer pain,
debility, and a lengthy stay in hospital.
Endovascular aneurysm repair is a less invasive alternative that substitutes a trans-arterial
route to the aneurysm for direct exposure, and stent-mediated attachment for sutured
anastomosis. Compared to open surgical repair, endovascular repair is associated with less
physiological derangement, less pain, less blood loss, lower complication rates and shorter
hospital stay. Consequently, endovascular repair has become standard therapy for aneurysms of
the abdominal aorta and descending thoracic aorta, where there are no vital branches and
endovascular exclusion rarely causes ischemic complications.
Open surgical repair of the proximal aortic arch requires hypothermic circulatory arrest,
because it deprives the heart of its outflow and the brain of its inflow. Endovascular repair
also obstructs outflow from the heart, but only for a few seconds, while the graft is
released from its delivery sheath. The greater problem is inflow to the brain. In
anticipation of aortic arch exclusion, the brachiocephalic circulation requires an
alternative source of blood. One alternative is bypass from the ascending aorta. However,
this requires median sternotomy and partial aortic clamping, both of with are potential
sources of morbidity.


Final eligibility is determined by the health professionals conducting the trial and the protocol approved by the Committee on Human Resources (CHR) at the University of California, San Francisco (UCSF). The Patient Consent Form for this trial is available upon request. For more information about this trial, please see the full posting at

Information about this trial was obtained from the NIH Clinical Trials website, on 7/6/2018. UCSF specific information including the PI (Principal Investigator), trial enrollment status, and UCSF Study ID, supplement the study posting.
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