Clinical trial NCT00722904: Evaluation of Vascular Pathology With 3D, Time-Resolved Phase Contrast Magnetic Resonance Imaging (MRI)
Official title: Evaluation of Vascular Pathology With 3D, Time-Resolved Phase Contrast MRI
Study type: OBSERVATIONAL
Overall status: COMPLETED
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
Lead sponsor: University of California, San Francisco
Sponsor class: OTHER
First posted: 2008-07-28
Enrollment: 40
Sex: ALL
Minimum age (years): 1
Standard ages: CHILD
ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Observational model: CASE_CONTROL
Time perspective: CROSS_SECTIONAL
Sampling method: NON_PROBABILITY_SAMPLE
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.

Brief 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. 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.


Eligibility criteria: Inclusion Criteria:

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.

Exclusion Criteria:

Anyone else.

Primary outcomes:
measure: predicting late complications in patients status post coarctation repair so that preemptive intervention may be taken
timeFrame: For at least three years following the completion of the study, the database of patients will be updated for clinically relevant information
Secondary outcomes:
Other outcomes:
Locations:
city: San Francisco
country: United States
facility: UCSF Medical Center
state: California
Study officials:
affiliation: UCSF Department of Radiology
name: Charles B Higgins, MD
role: PRINCIPAL_INVESTIGATOR
References:
citation: 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.
citation: 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.
citation: 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
citation: 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.
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