STretch and Myocardial Characterization in Arrythmogenic Mitral Valve Prolapse-2 (STAMP-2)

Central Hospital, Nancy, France

Status

Enrolling

Conditions

Mitral Valve Prolapse

Treatments

Procedure: Prolongation of the MRI examination

Procedure: Cardiac MRI

Other: Blood collection

Study type

Interventional

Funder types

Other

Identifiers

NCT04852731

2020-A02680-39

Details and patient eligibility

About

Mitral valve prolapse (MVP) is a frequent affection of the mitral valve with a prevalence of 2-3% in the general population. This valvular disease is generally considered as benign, but may at term evolve toward mitral valve regurgitation of various severity and/or arrhythmia.

Mitral valve prolapse is routinely diagnosed using transthoracic echocardiography. Subsequent examinations (24-hour external loop recording, exercise electrocardiogram, cardiac Magnetic Resonance Imaging) and a close follow-up can be proposed to the patient depending on its condition.

More recently, detection of myocardial fibrosis and a mitral ring disjunction among patients with MVP were associated with the occurrence of severe ventricular arrhythmia.

The investigators hypothesize that ventricular remodeling over time is mediated by the progression of mitral insufficiency severity from myocardial fibrosis secondary to MVP and possibly promoted by other mitral valve abnormalities. This remodeling, characterized by circulating biomarkers and imaging (MRI and echocardiography), could allow the identification of patients with a higher risk of severe ventricular arrhythmia.

The main objective of this study is to identify prognostic factors for unfavorable evolution (ventricular remodeling or a rhythm disorder event) at 3 years from initial assessments in MVP patients.

Enrollment

280 estimated patients

Sex

All

Ages

18+ years old

Volunteers

No Healthy Volunteers

Inclusion criteria

Patient over 18 years old,
Patient with mitral valve prolapse,
Patient who has received full information about the organization of the research and has signed an informed consent,
Patient affiliated to or beneficiary of a social security insurance,
Patient who has completed a prior clinical examination adapted to the research and who does not show any contraindication to the planned examinations

Exclusion criteria

Stage of the disease: Patients with MVP with severe mitral regurgitation with a surgical indication as defined by current recommendations will not be included in the study,
Presence of severe rhythm disorders requiring the implantation of a defibrillator (cardiorespiratory arrest recovered, sudden death recovered, etc.),
Performance of an injected MRI in the month preceding the MRI scheduled during visit n°1,
Previously diagnosed cardiopathy that may be responsible for myocardial damage (ventricular remodeling, alteration of left ventricular systolic function, fibrosis, etc.) and that may disrupt the interpretation of results (infarction, amyloidosis, systemic scleroderma, significant aortic valvulopathy, etc.).
Contraindication to MRI examination, particularly in the presence of an implantable pacemaker or defibrillator, implanted pump, cochlear implants, neurosurgical clips, intraorbital or encephalic metallic foreign bodies,
Claustrophobia or morphotype that does not allow MRI to be performed,
Motor or mental disability,
Renal impairment that does not allow the injection of Gadolinium-based contrast media (DOTAREM® or equivalent in the study). If there is any doubt as to the patient's renal function, a plasma creatinine determination will be performed for MRI to ensure the absence of renal failure,
Hypersensitivity to gadoteric acid, meglumine, or any gadolinium-containing drug.
Women of childbearing age who do not have effective contraception,
Persons referred to in Articles L. 1121-5 to L1121-8 of the Public Health Code.

Trial design

Primary purpose

Diagnostic

Allocation

Non-Randomized

Interventional model

Parallel Assignment

Masking

None (Open label)

280 participants in 5 patient groups

Group A (a) : patients without mitral regurgitation without ventricular extrasystole (≤10/hour)

Experimental group

Description:

These patients will undergo at the inclusion and 36 months after the inclusion : * According to recommendations : echocardiography, 24-hour external loop recording and exercise ECG, * And specifically for research purposes : injected cardiac MRI and a blood collection.

Treatment:

Procedure: Cardiac MRI

Other: Blood collection

Group A (b) : patients without mitral regurgitation with ventricular extrasystole (>10/hour)

Experimental group

Description:

These patients will undergo at the inclusion and 36 months after the inclusion : * According to recommendations : echocardiography, 24-hour external loop recording, exercise ECG, injected cardiac MRI, * And specifically for research purposes : prolongation of the MRI examination (4D flow sequence) and a blood collection.

Treatment:

Procedure: Prolongation of the MRI examination

Other: Blood collection

Group B : patients with Mitral valve prolapse with trivial mitral regurgitation

Experimental group

Description:

Treatment:

Procedure: Prolongation of the MRI examination

Other: Blood collection

Group C : patients with Mitral valve prolapse with moderate or mild mitral regurgitation

Experimental group

Description: