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AzTrials

HealthyNCT00722904

Evaluation of Vascular Pathology With 3D, Time-Resolved Phase Contrast Magnetic Resonance Imaging (MRI)

An observational study of Healthy, run by University of California, San Francisco at 1 site in United States.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

Aortic coarctation is a relatively common cardiovascular condition with high associated mortality if not treated. Even with successful repair, however, close follow up is needed as late complications can result in significant cardiovascular morbidity. Read more about this study

Who is it for?
Ages 1 year and olderHealthy volunteers can take part
Conditions the study is for
Healthy
How many people
40 participants
Where
1 siteUnited States
Study dates
Jun 2007to Sep 2010
Phase
Observational
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 1 year and older
  • All sexes
  • Healthy volunteers accepted
  • Child, Adult, Older adult

Study population: Patients: primarily status post intervention for repair of aortic coarctation and undergoing routine MRI follow up, but also adult patients with other vascular pathologies undergoing routine MRI evaluation, who may be good candidates for 4D Flow blood flow analysis. Healthy subjects: healthy members of the radiology residency program and staff at UCSF.

Who may be able to join

  • Patients: primarily status post intervention for repair of aortic coarctation and undergoing routine MRI follow up, but also adult patients with other vascular pathologies undergoing routine MRI evaluation, who may be good candidates for 4D Flow blood flow analysis.
  • Healthy subjects: healthy members of the radiology residency program and staff at UCSF.

Who cannot join

  • Anyone else.

Trial locations and contacts

1 site in 1 country.

United States1 site

  • UCSF Medical Center

    San Francisco, California, 94143

Other trials in United States

About this study

Official title: Evaluation of Vascular Pathology With 3D, Time-Resolved Phase Contrast MRI

Aortic coarctation is a relatively common cardiovascular condition with high associated mortality if not treated. Even with successful repair, however, close follow up is needed as late complications can result in significant cardiovascular morbidity. MRI, with is ability to provide both anatomic and hemodynamic information, is becoming the imaging option of choice for post-intervention surveillance. Time-resolved, three-dimensional phase contrast magnetic resonance velocity (4D Flow) profiling enables the acquisition of multidirectional blood velocity data. The technique is well suited for evaluation of blood flow patterns in the thoracic aorta. By comparing aortic flow patterns in patients status post coarctation repair with those of healthy volunteers using 4D Flow, this study intends to characterize abnormal flow patterns in these patients with the eventual goal of better understanding and predicting late complications so that preemptive intervention may be taken.

Given the potential use of 4D Flow for evaluation of other types of vascular pathology in the aorta and other vascular regions, we hope to investigate the use of the technique on a limited basis for a broader population of adult patients. Other research groups have had success evaluating peripheral stenoses, as well as intracardiac and intracranial blood flow patterns with 4D Flow.

Conditions
Healthy
Keywords
post-intervention surveillance of aortic coarctation, MRA and 2D phase contrast imaging, 4D Flow velocity mapping, Patients undergoing routine post-intervention surveillance of aortic coarctation, Healthy volunteers

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

Study groups in NCT00722904
Study groupRoleWhat they receive
1patients undergoing routine post-intervention surveillance of aortic coarctation
2Healthy volunteers

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. predicting late complications in patients status post coarctation repair so that preemptive intervention may be taken

    Measured: For at least three years following the completion of the study, the database of patients will be updated for clinically relevant information

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted28 Jul 2008 (estimated)
  2. Study startJun 2007
  3. Primary completionJul 2009
  4. Study completionSep 2010

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Observational
Observational model
Case-control
Time perspective
Cross-sectional
Enrolment
40 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT00722904
Sponsor's protocol ID
H627-30777
Other IDs
H627-30777-01A
Status last verified
Oct 2013
First submitted
24 Jul 2008
Last updated
8 Oct 2013
Results posted
No
Data monitoring committee
Yes

Publications

  • Markl M, Draney MT, Hope MD, Levin JM, Chan FP, Alley MT, Pelc NJ, Herfkens RJ. Time-resolved 3-dimensional velocity mapping in the thoracic aorta: visualization of 3-directional blood flow patterns in healthy volunteers and patients. J Comput Assist Tomogr. 2004 Jul-Aug;28(4):459-68. doi: 10.1097/00004728-200407000-00005.

    PubMed 15232376

  • Hope MD, Levin JM, Markl M, Draney MT, Alley M, Herfkens RJ. Images in cardiovascular medicine. Four-dimensional magnetic resonance velocity mapping in a healthy volunteer with pseudocoarctation of the thoracic aorta. Circulation. 2004 Jun 29;109(25):3221-2. doi: 10.1161/01.CIR.0000134277.42512.D5. No abstract available.

    PubMed 15226232

  • Hope MD, Levin JM, Markl M, Draney MT, Wilson N, Herfkens RJ. 4D Magnetic Resonance Velocity Mapping: Velocity Profile of Blood-Flow Through the Thoracic Aorta in 10 Healthy Volunteers. Abstract. ISMRM 12th Scientific Meeting, 2004

  • Hope MD, Levin JM, Markl M, Draney MT, Alley MT, Dunn WN, Pelc NJ, Herfkens RJ. Four-Dimensional Magnetic Resonance Velocity Mapping: Velocity Profile of Blood Flow Through the Thoracic Aorta in 10 Healthy Volunteers. Lauterbur Award. Young Investigator Research Abstract Awards, SCBT/MR, 2004.

  • Shih MC, Tholpady A, Kramer CM, Sydnor MK, Hagspiel KD. Surgical and endovascular repair of aortic coarctation: normal findings and appearance of complications on CT angiography and MR angiography. AJR Am J Roentgenol. 2006 Sep;187(3):W302-12. doi: 10.2214/AJR.05.0424.

    PubMed 16928909

  • Celermajer DS, Greaves K. Survivors of coarctation repair: fixed but not cured. Heart. 2002 Aug;88(2):113-4. doi: 10.1136/heart.88.2.113.

    PubMed 12117824

  • Toro-Salazar OH, Steinberger J, Thomas W, Rocchini AP, Carpenter B, Moller JH. Long-term follow-up of patients after coarctation of the aorta repair. Am J Cardiol. 2002 Mar 1;89(5):541-7. doi: 10.1016/s0002-9149(01)02293-7.

    PubMed 11867038

  • Klipstein RH, Firmin DN, Underwood SR, Rees RS, Longmore DB. Blood flow patterns in the human aorta studied by magnetic resonance. Br Heart J. 1987 Oct;58(4):316-23. doi: 10.1136/hrt.58.4.316.

    PubMed 3676019

  • Bogren HG, Klipstein RH, Firmin DN, Mohiaddin RH, Underwood SR, Rees RS, Longmore DB. Quantitation of antegrade and retrograde blood flow in the human aorta by magnetic resonance velocity mapping. Am Heart J. 1989 Jun;117(6):1214-22. doi: 10.1016/0002-8703(89)90399-2.

    PubMed 2729051

  • Kilner PJ, Yang GZ, Mohiaddin RH, Firmin DN, Longmore DB. Helical and retrograde secondary flow patterns in the aortic arch studied by three-directional magnetic resonance velocity mapping. Circulation. 1993 Nov;88(5 Pt 1):2235-47. doi: 10.1161/01.cir.88.5.2235.

    PubMed 8222118

  • Hope TA, Markl M, Wigstrom L, Alley MT, Miller DC, Herfkens RJ. Comparison of flow patterns in ascending aortic aneurysms and volunteers using four-dimensional magnetic resonance velocity mapping. J Magn Reson Imaging. 2007 Dec;26(6):1471-9. doi: 10.1002/jmri.21082.

    PubMed 17968892

  • Saeed M, Henk CB, Weber O, Martin A, Wilson M, Shunk K, Saloner D, Higgins CB. Delivery and assessment of endovascular stents to repair aortic coarctation using MR and X-ray imaging. J Magn Reson Imaging. 2006 Aug;24(2):371-8. doi: 10.1002/jmri.20631.

    PubMed 16786568

  • Pujadas S, Reddy GP, Weber O, Tan C, Moore P, Higgins CB. Phase contrast MR imaging to measure changes in collateral blood flow after stenting of recurrent aortic coarctation: initial experience. J Magn Reson Imaging. 2006 Jul;24(1):72-6. doi: 10.1002/jmri.20613.

    PubMed 16755530

  • Frydrychowicz A, Winterer JT, Zaitsev M, Jung B, Hennig J, Langer M, Markl M. Visualization of iliac and proximal femoral artery hemodynamics using time-resolved 3D phase contrast MRI at 3T. jMRI 2007 vol. 25 pp. 1085-92. 15. Bammer R, Hope TA, Aksoy M, Alley MT. Time-resolved 3D quantitative flow MRI of the major intracranial vessels: initial experience and comparative evaluation at 1.5T and 3.0T in combination with parallel imaging. MRM 2007: 57:127-40.

  • Wigstrom L, Ebbers T, Fyrenius A, Karlsson M, Engvall J, Wranne B, Bolger AF. Particle trace visualization of intracardiac flow using time-resolved 3D phase contrast MRI. Magn Reson Med. 1999 Apr;41(4):793-9. doi: 10.1002/(sici)1522-2594(199904)41:43.0.co;2-2.

    PubMed 10332856

Questions about this trial

What is this clinical trial studying?

An observational study of Healthy, run by University of California, San Francisco at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 2 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 8 Oct 2013. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

predicting late complications in patients status post coarctation repair so that preemptive intervention may be taken (time frame: For at least three years following the completion of the study, the database of patients will be updated for clinically relevant information). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT00722904, which also lists 15 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 8 Oct 2013.

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