Understanding the Metabolic and Functional Derangement of Primary Mitral Regurgitation: a Feasibility Study Using Carbon 11(C-11) Acetate Cardiac Positron Emission Tomography Magnetic Resonance Imaging (PET-MRI)

Mitral Valve Regurgitation Clinical Trial

Official title:

Understanding the Metabolic and Functional Derangement of Primary Mitral Regurgitation: a Feasibility Study Using C-11 Acetate Cardiac PET-MRI

Clinical Trial Details — Status: Not yet recruiting

Administrative data

• NCT number: NCT04795856
• Other study ID #: R20-178
• Status: Not yet recruiting
• Phase: Early Phase 1
• Start date: June 18, 2027
• Est. completion date: August 31, 2028

Study information

• Verified date: January 2024
• Source: University of Alabama at Birmingham
• Contact: Sebastian Eady
• Phone: 205-996-2636
• Email: smeady[@]uabmc.edu
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The aim of this pilot imaging study is to investigate the underlying changes in myocardial oxidative metabolism, myocardial inflammation and alterations in extracellular volume in patients with chronic compensated moderate-severe primary mitral regurgitation (PMR). The PET tracer [11C] acetate will be used to image and quantify myocardial oxygen consumption (MVO2) in hearts of the study participants. Cardiac magnetic resonance imaging (CMR) using a gadolinium-based contrast agent (GBCA) will be performed to assess for and quantify expansion of myocardial extracellular volume (ECV) and myocardial inflammation. We will enroll a total of 12 participants, nine of whom will be patients with chronic, compensated asymptomatic moderate-severe PMR evaluated at the UAB Cardiovascular Disease and Structural Valve Clinic and three normal control subjects.

Recruitment information / eligibility

• Status: Not yet recruiting
• Enrollment: 12
• Est. completion date: August 31, 2028
• Est. primary completion date: August 31, 2028
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• At least 18 years of age.

• Patients with chronic, asymptomatic, compensated PMR evaluated in the UAB Structural Valve Clinic OR Normal controls identified from a normal aged matched population.

• Negative urine or serum ß-human chorionic gonadotropin (hcg) test within 48 hours of [11C] acetate administration in women of childbearing potential. Women who are post-menopausal with at least 1 year since last menses or documented surgical sterilization will not require pregnancy testing.

Exclusion Criteria:

• Inability to provide informed consent

• Pregnancy

• Inability to lie still for the imaging study

• Weight exceeding the weight limit of the PET imaging table (500 pounds)

• Comorbidities including any of the following: history of coronary artery disease, prior coronary revascularization, prior myocardial infarction, prior open sternotomy, history of congestive heart failure, history of non-ischemic cardiomyopathy including dilated, restrictive, hypertrophic, amyloid heart disease, cardiac sarcoidosis, history of hypertension, diabetes mellitus, chronic kidney disease with a glomerular filtration rate (GFR) less than 60 ml/min/1.73 m2 , history of other valvular heart disease defined as mitral stenosis, aortic stenosis, more than mild aortic regurgitation, more than mild tricuspid regurgitation, history of more than mild pulmonary hypertension and history of cancer with exposure to chemotherapy or radiotherapy.

• Contraindication for gadolinium-based contrast agent, ProHance (gadoteridol)

• Contraindication for MRI study (e.g. non-removable metal implants or certain tattoos)

Related Conditions & MeSH terms

• Mitral Valve Insufficiency
• Mitral Valve Regurgitation

Intervention

Drug:
• [11C] acetate
PET Tracer

Locations

Country	Name	City	State
United States	University of Alabama at Birmingham	Birmingham	Alabama

Sponsors (1)

Lead Sponsor	Collaborator
University of Alabama at Birmingham

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Quantitatively correlate metabolic findings from the PET component with quantitative T1 and T2 parametric mapping from the cardiac MR component of the hybrid PET-MR study.	Parametric analysis of T1 and T2 mapping will be performed using dedicated software (Qmap, Medis).	0-48 hours