Comparing surgery and monitoring for ascending aortic aneurysms
Official title: Treatment in Thoracic Aortic Aneurysm: Surgery vs Surveillance (TITAN:SvS)
Run by Ottawa Heart Institute Research Corporation · NCT03536312 · Data updated 2026-11-12
This study tests whether early surgery or careful monitoring is better for people aged 18 to 79 with asymptomatic ascending aortic aneurysms that are between 5.0 cm and 5.4 cm.
Quick facts
| Study type | Interventional |
|---|---|
| Ages | 18 Years to 79 Years |
| Sex | All |
| Enrollment | 610 (estimated) |
| Sponsor | Ottawa Heart Institute Research Corporation Academic / other |
| Locations | 31 sites (San Francisco, California and 30 other locations) |
| Status | Recruiting |
| Started | September 1, 2018 |
| Main results expected | May 31, 2035 |
| Study ends | May 31, 2035 |
| Registry record updated | November 2, 2026 |
| Trial ID | NCT03536312 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates are asymptomatic patients aged 18 to 79 with an ascending aortic aneurysm measuring between 5.0 cm and 5.4 cm.
✕Probably not a fit
Patients with symptomatic ascending aortic aneurysms or those unable to comply with follow-up may not benefit from this study.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This trial evaluates the effectiveness of early surgical intervention versus surveillance in patients with asymptomatic ascending aortic aneurysms measuring between 5.0 cm and 5.4 cm. Patients aged 18 to 79 will be randomly assigned to either undergo surgery or be closely monitored. The study aims to gather data on patient outcomes, including the risk of aneurysm rupture and overall survival rates. Comprehensive baseline assessments will be conducted, including imaging and quality of life evaluations, to ensure appropriate patient selection and monitoring.
Why it matters
Potential benefit: If successful, this study could provide clearer guidelines for managing ascending aortic aneurysms, potentially reducing unnecessary surgeries and improving patient outcomes.
How similar studies have gone: While there have been studies on surgical intervention for aortic aneurysms, this specific randomized approach comparing surgery to surveillance in this size range is relatively novel.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria:
1. Patients between the age of 18 and 79 inclusive.
2. Ascending aortic aneurysm between 5.0cm and 5.4cm in maximal diameter as measured by CT with contrast.
3. Patients with ascending aortic aneurysm with a diameter of 4.5 cm - 4.9 cm will be observed with serial CT, and will be considered for enrollment into the trial once the aneurysm reaches 5.0 cm.
Exclusion Criteria:
1. Patients who refused to be randomized
2. Patients with symptomatic attributable to ascending aortic aneurysms
3. Patients who are unable to provide informed consents
4. Patients who are unable to attend for regular follow-up/ remain compliant with protocol
5. Previous cardiac surgery
6. Patients whose primary indication for cardiac surgery is non-AsAA related
7. Known AsAA expansion rate exceeding 0.5 cm/year during the past 5 years
8. Arch aneurysms with no ascending aorta involvement (no aneurysmal segments before the innominate artery)
9. Ascending aortic and arch aneurysm with descending thoracic aorta involvement
10. Patients with known connective tissue disease (E.g. Marfan syndrome, Loey-Dietz syndrome, Turner syndrome etc) syndrome, etc.)
11. Patients with possible genetic aortopathies (eg known family history of aortic aneurysms/premature aortic dissections/ruptures)
12. Patients with inflammatory arteritis (e.g. takayasu's arteritis, syphilitic arteritis, etc.)
13. Female patients who are pregnant or planning to become pregnant
14. Patients who have a history or presence of a medical condition or disease or psychiatric condition that in the investigator's assessment would render the subject ineligible for study participation.
15. Patients who, in the opinion of the investigator, are deemed unfit for surgery for reasons that may include:
* Severe pulmonary disease
* Cr = 250umol/L
* Child Pugh Class B or C
* NYHA III or IV
* MI within the last 6 months
* Major surgical procedure or angioplasty within 3 months
* Expected survival less than 5 years because of other disease (e.g. invasive cancer)
Where it's running
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University of California at San Francisco Medical Center
San Francisco, California, United States Recruiting -
University of Iowa
Iowa City, Iowa, United States Recruiting -
Massachusetts General Hospital
Boston, Massachusetts, United States Recruiting -
Beth Israel Deaconess Medical Center
Boston, Massachusetts, United States Recruiting -
University of Michigan
Ann Arbor, Michigan, United States Recruiting -
Mayo Clinic
Rochester, Minnesota, United States Recruiting
Show 25 more locations
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Washington University School of Medicine
St Louis, Missouri, United States Recruiting -
The Valley Hospital, Inc
Ridgewood, New Jersey, United States Recruiting -
Icahn School of Medicine at Mount Sinai
New York, New York, United States Recruiting -
Duke University
Durham, North Carolina, United States Recruiting -
University Hospitals Cleveland
Cleveland, Ohio, United States Recruiting -
Ohio State University Medical Center
Columbus, Ohio, United States Recruiting -
The Trustees of the University of Pennsylvania
Philadelphia, Pennsylvania, United States Recruiting -
MUSC Health University Medical Center
Charleston, South Carolina, United States Recruiting -
University of Texas Health Science Centre
Houston, Texas, United States Recruiting -
Baylor Scott & White Research Institute
Plano, Texas, United States Recruiting -
Mazankowski Alberta Heart Institute
Edmonton, Alberta, Canada Recruiting -
Horizon Health Network
Saint John, New Brunswick, Canada Recruiting -
Newfoundland Health Services
St. John's, Newfoundland and Labrador, Canada Recruiting -
Nova Scotia Health Authority
Halifax, Nova Scotia, Canada Recruiting -
Health Sciences North
Greater Sudbury, Ontario, Canada Recruiting -
London Health Sciences Centre
London, Ontario, Canada Recruiting -
University of Ottawa Heart Institute
Ottawa, Ontario, Canada Recruiting -
Toronto General Hospital
Toronto, Ontario, Canada Recruiting -
Montreal Heart Institute
Montreal, Quebec, Canada Recruiting -
McGill University Health Centre
Montreal, Quebec, Canada Recruiting -
Institut universitaire de cardiologie et de pneumologie de Québec
Québec, Quebec, Canada Recruiting -
Skåne University Hospital
Malmö, Skåne County, Sweden Recruiting -
University of Calgary
Calgary, Alberta, Canada Active not recruiting -
Hamilton General Hospital
Hamilton, Ontario, Canada Active not recruiting -
St. Michael's Hospital
Toronto, Ontario, Canada Not yet recruiting
Study contacts
- Principal investigator: Munir Boodhwani, MD — Ottawa Heart Institute Research Corporation
- Study coordinator: Khatira Mehdiyeva
- Email: kmehdiyeva@ottawaheart.ca
- Phone: 613-696-7000
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
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Treatment for Thoracic Aortic Aneurysms and Valve Conditions
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This compares outcomes of full sternotomy and J-shaped mini-sternotomy in adults having hemiarch repair for an ascending aortic aneurysm to see which approach leads to better early and late recovery.
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Using lung ultrasound to improve outcomes in cardiac surgery patients
This study is testing if using lung ultrasound can help doctors find lung problems earlier in patients after heart surgery compared to regular X-rays and CT scans.
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Evaluating the properties of the thoracic aorta in patients with ascending aortic aneurysm
This study is testing how the thoracic aorta behaves in patients with an ascending aortic aneurysm who are about to have surgery, to see if it can help improve treatment and monitoring.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.