Real-time MRI Right Heart Catheterization Using Passive Catheters
|First Received Date ICMJE||January 25, 2011|
|Last Updated Date||January 31, 2015|
|Start Date ICMJE||January 2011|
|Primary Completion Date||Not Provided|
|Current Primary Outcome Measures ICMJE
||To test the initial safety and feasibility of diagnostic right heart catheterization in human subjects using MRI-guidance and "passive" catheters|
|Original Primary Outcome Measures ICMJE||Same as current|
|Change History||Complete list of historical versions of study NCT01287026 on ClinicalTrials.gov Archive Site|
|Current Secondary Outcome Measures ICMJE
|Original Secondary Outcome Measures ICMJE||Same as current|
|Current Other Outcome Measures ICMJE||Not Provided|
|Original Other Outcome Measures ICMJE||Not Provided|
|Brief Title ICMJE||Real-time MRI Right Heart Catheterization Using Passive Catheters|
|Official Title ICMJE||Real-Time MRI Right Heart Catheterization Using Passive Catheters|
- Currently, heart catheterization procedures are guided by X-rays. Researchers are developing new techniques to perform heart catheterization without the use of X-rays by investigating possible uses of magnetic resonance imaging (MRI) scans. To study these uses, researchers are interested in performing a part of the standard X-ray catheterization procedure using MRI on individuals who are scheduled to have heart catheterization.
- To examine the safety and feasibility of right-heart catheterization using MRI-guided catheters.
- Individuals at least 21 years of age who are undergoing a medically necessary heart catheterization procedure.
Heart catheterization is a minimally invasive procedure to measure pressure and inject dye into specific heart cavities. Heart catheterization usually uses X-ray guidance, which involves radiation exposure and which fails to visualize soft tissue.
We have developed real-time magnetic resonance imaging (MRI) to guide heart catheterization with tissue visualization but without X-ray radiation. In the first phase of this protocol we showed that comprehensive right-sided heart catheterization is feasible in adult patients, using commercially available MRI-compatible ( passive ) catheters.
In the second phase of the protocol, we began performing systematic right-sided heart catheterization without X-ray whenever possible. We will assess the hearts response to hemodynamic provocation during MRI catheterization tailored to the patient s problem. We will use this protocol to further refine the technique
If successful, this will enable future testing of devices for adult and pediatric MRI-guided catheterization, such as special active wire guides, which may lead to new non-surgical treatments of cardiovascular disease.
|Study Type ICMJE||Interventional|
|Study Phase||Phase 1|
|Study Design ICMJE||Allocation: Non-Randomized
Endpoint Classification: Safety Study
Intervention Model: Single Group Assignment
Masking: Open Label
|Study Arm (s)||Not Provided|
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
|Recruitment Status ICMJE||Recruiting|
|Estimated Enrollment ICMJE||150|
|Estimated Completion Date||January 2017|
|Primary Completion Date||Not Provided|
|Eligibility Criteria ICMJE||
Age greater than or equal to 2 years old
Undergoing medically necessary diagnostic or interventional right and/or left cardiovascular catheterization
EXCLUSION CRITERIA :
Cardiovascular instability including ongoing acute myocardial infarction, refractory angina or ischemia, and decompensated congestive heart failure.
Women who are pregnant or nursing
Unable to undergo magnetic resonance imaging:
EXCLUSION CRITERIA FOR GADOLINIUM-BASED CONTRAST AGENTS FOR ADULTS:
Renal excretory dysfunction, estimated glomerular filtration rate < 30 mL/min/1.73m(2) body surface area according to the Modification of Diet in Renal Disease criteria
Glomerular filtration rate will be estimated using the CKD-EPI equation (33):
eGFR equal 141 x (minimum of (Scr/K, 1)(a) x (maximum of (Scr/K, 1)) (-1.209) x 0.993(Ag x 1.018 (if female) x 1.159 (if black)
Where< TAB> Scr equal serum creatinine
a = -0.329 for females and -0.411 for males
k = 0.7 for females and 0.9 for males
Subjects meeting this exclusion criterion may still be included in the study but may not be exposed to gadolinium-based contrast agents.
EXCLUSION CRITERIA FOR GADOLINIUM-BASED CONTRAST AGENTS FOR CHILDREN
Renal excretory dysfunction, estimated glomerular filtration rate < 30 mL/min/1.73m(2) body surface area according to the Schwartz equation for estimation of GFR in children as recommended by the National Kidney Disease Education Program. The Schwartz equation is commonly used for GFR determination in children at Children s National Medical Center, Washington, DC.
GFR (mL/min/1.73 m2) = (k (SqrRoot) height) / serum creatinine concentration where K = constant defined as
k = 0.33 in premature infants [Excluded from this protocol]
k = 0.45 in term infants to 1 year of age [Excluded from this protocol]
k = 0.55 in children to 13 years of age
k = 0.70 in adolescent males (not females because of the presumed increase in male muscle mass,
the constant remains 0.55 for females)
|Ages||2 Years and older|
|Accepts Healthy Volunteers||No|
|Listed Location Countries ICMJE||United States|
|Removed Location Countries|
|NCT Number ICMJE||NCT01287026|
|Other Study ID Numbers ICMJE||110091, 11-H-0091|
|Has Data Monitoring Committee||Not Provided|
|Responsible Party||Not Provided|
|Study Sponsor ICMJE||National Heart, Lung, and Blood Institute (NHLBI)|
|Collaborators ICMJE||Not Provided|
|Information Provided By||National Institutes of Health Clinical Center (CC)|
|Verification Date||October 2014|
ICMJE Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP