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Study identifier: NCT02098252 Synced from ClinicalTrials.gov · July 28, 2026
● Recruiting

Treatment of Brain AVMs (TOBAS) Study

Condition: Unruptured Brain Arteriovenous Malformation · Ruptured Brain Arteriovenous Malformation · Arteriovenous Malformations  ·  Sponsor: Centre hospitalier de l'Université de Montréal (CHUM)

PhaseNA
Planned participants1000
Who can joinAll sexes, 5 Years to no upper limit
Healthy volunteersNo

About this study

The objectives of this study and registry are to offer the best management possible for patients with brain arteriovenous malformations (AVMs) (ruptured or unruptured) in terms of long-term outcomes, despite the presence of uncertainty. Management may include interventional therapy (with endovascular procedures, neurosurgery, or radiotherapy, alone or in combination) or conservative management. The trial has been designed to test a) whether medical management or interventional therapy will reduce the risk of death or debilitating stroke (due to hemorrhage or infarction) by an absolute magnitude of about 15% (over 10 years) for unruptured AVMs (from 30% to 15%); and, b) to test if endovascular treatment can improve the safety and efficacy of surgery or radiation therapy by at least 10% (80% to 90%). As for the nested trial on the role of embolization in the treatment of Brain AVMs by other means: the pre-surgical or pre-radiosurgery embolization of cerebral AVMs can decrease the number of treatment failures from 20% to 10%. In addition,embolization of cerebral AVMs can be accomplished with an acceptable risk, defined as permanent disabling neurological complications of 8%.

This description comes directly from the study's public registry record.

Talk to the study team

Daniel Roy, MD  ·  514-890-8000  ·  daniel.roy.chum@ssss.gouv.qc.ca

Tim Darsaut, MD  ·  780-407-1440  ·  tdarsaut@ualberta.ca

Always discuss trial participation with your own doctor first.

Locations (30)

Mayo Clinic in Jacksonville FLJacksonville, Florida, United StatesRecruiting
Boston Medical CenterBoston, Massachusetts, United StatesRecruiting
University of New Mexico Health Sciences CenterAlbuquerque, New Mexico, United StatesRecruiting
Hospital Geral de FortalezaFortaleza, BrazilRecruiting
Universidade Federal de Sǎo PauloSão Paulo, BrazilRecruiting
University of Alberta HospitalEdmonton, Alberta, CanadaRecruiting
Klink, RubyMontreal, Quebec, CanadaRecruiting
Instituto de Neurocirugia Dr. A. AsenjoSantiago, ChileRecruiting
Universidad Autonoma de BucaramangaBucaramanga, ColombiaRecruiting
CHRU de Brest (Brest University Hospital)Brest, Brittany Region, FranceRecruiting
Centre Hospit Régional Universitaire de BesançonBesançon, FranceRecruiting
Centre Hospitalier Universitaire de BordeauxBordeaux, FranceRecruiting

+ 18 more locations — full list on the registry record.

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Source record: clinicaltrials.gov/study/NCT02098252