Ignite Creation Date:
2024-05-05 @ 11:44 AM
Last Modification Date:
2024-10-26 @ 9:12 AM
Study NCT ID:
NCT00115856
Status:
COMPLETED
Last Update Posted:
2015-08-03
First Post:
2005-06-26
Brief Title:
Imaging of Plaque With Magnetic Resonance Imaging MRI
Sponsor:
Brigham and Womens Hospital
Organization:
Brigham and Womens Hospital
Study Overview
Official Title:
Imaging of Plaque in Atherosclerosis With Intravascular MRI
Status:
COMPLETED
Status Verified Date:
2015-07
Last Known Status:
None
Delayed Posting:
No
If Stopped, Why?:
Not Stopped
Has Expanded Access:
False
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
None
Brief Summary:
This study aims to develop and refine the use of an intravascular wire to image plaque in the aorta iliac and femoral artery using MRI This project aims to use this increased resolution to identify the features within the plaque that is known to be associated with increased risk of plaque and vessel occlusion
The hypothesis is Intravascular MRI can detect and measure changes in response to therapy over time in the critical features in plaques in peripheral arteries of patients with atherosclerosis
The hypothesis is Intravascular MRI can detect and measure changes in response to therapy over time in the critical features in plaques in peripheral arteries of patients with atherosclerosis
Detailed Description:
For those patients undergoing cardiac catheterization an 8French sheath will be introduced via a femoral artery approach This size sheath allows us to visualize the distal aorta while performing the intra vascular ultrasound IVUS For these patients if a femoral venous sheath is also positioned for clinical purposes then this access will also be utilized to introduce the MRI coil This imaging approach will allow us to compare the feasibility of intravascular MRI imaging from a the artery b the vein c a combination of both
For those patients not scheduled to undergo a clinically indicated cardiac catheterization only a 6French sheath will be introduced via a femoral artery approach In these patients no femoral venous sheath will be introduced and the arterial access will not be upsized to a 8French sheath
Two tablespoons of blood will be drawn from each patient to assess inflammatory markers such as C-Reactive Protein CRP as well as to confirm a negative pregnancy test for female patients of childbearing age
Using 20cc of non-ionic contrast an angiogram of the distal aorta and the ilio-femoral region will be performed and recorded on disc 5mins Thereafter an approved guidewire and intravascular ultrasound catheter will be positioned in the same arteries via the same access route and ultrasound images of the arterial segment will be recorded 10mins The guidewire and the ultrasound coil will then be removed Finally an intravascular MRI wire will be advanced through the same arterial access andor the previously indicated venous access under X-ray control and positioned in the desired atherosclerotic segment in the region of the distal aorta or at the ilio-femoral area The MRI wires will be secured in place by Tegaderm and the femoral sheaths will be sutured in stable position The patient will then be transported to the MRI scanner positioned in the scanner and images recorded over a period not exceeding 60 minutes During the transport and throughout the MRI scanning the patient will be monitored via an MRI-compatible cardiac monitor During the time that the intravascular MRI coil is within the femoral sheath it will be continuously perfused with heparinized saline and the patient will receive weight- adjusted 12 Ukg intravenous heparin for systemic anticoagulation to prevent thrombosis To obtain the MRI images the patients will receive gadolinium contrast as per routine radiology protocols 01-02 mmolkg After recording the MRI images the MRI coils and the femoral sheaths will be removed from the artery andor the vein as per usual care
For those patients not scheduled to undergo a clinically indicated cardiac catheterization only a 6French sheath will be introduced via a femoral artery approach In these patients no femoral venous sheath will be introduced and the arterial access will not be upsized to a 8French sheath
Two tablespoons of blood will be drawn from each patient to assess inflammatory markers such as C-Reactive Protein CRP as well as to confirm a negative pregnancy test for female patients of childbearing age
Using 20cc of non-ionic contrast an angiogram of the distal aorta and the ilio-femoral region will be performed and recorded on disc 5mins Thereafter an approved guidewire and intravascular ultrasound catheter will be positioned in the same arteries via the same access route and ultrasound images of the arterial segment will be recorded 10mins The guidewire and the ultrasound coil will then be removed Finally an intravascular MRI wire will be advanced through the same arterial access andor the previously indicated venous access under X-ray control and positioned in the desired atherosclerotic segment in the region of the distal aorta or at the ilio-femoral area The MRI wires will be secured in place by Tegaderm and the femoral sheaths will be sutured in stable position The patient will then be transported to the MRI scanner positioned in the scanner and images recorded over a period not exceeding 60 minutes During the transport and throughout the MRI scanning the patient will be monitored via an MRI-compatible cardiac monitor During the time that the intravascular MRI coil is within the femoral sheath it will be continuously perfused with heparinized saline and the patient will receive weight- adjusted 12 Ukg intravenous heparin for systemic anticoagulation to prevent thrombosis To obtain the MRI images the patients will receive gadolinium contrast as per routine radiology protocols 01-02 mmolkg After recording the MRI images the MRI coils and the femoral sheaths will be removed from the artery andor the vein as per usual care
Study Oversight
Has Oversight DMC:
None
Is a FDA Regulated Drug?:
None
Is a FDA Regulated Device?:
None
Is an Unapproved Device?:
None
Is a PPSD?:
None
Is a US Export?:
None
Is an FDA AA801 Violation?:
None